User Manual 4 - Total Marine Technology
Contents
1. The measurement tool is a virtual ruler with a graduated scale 0 300 and a set of adjustable calipers This allows the user to measure distances and angles with a high degree of accuracy The ruler can be scaled from 0 3 to 3000 meters The resolution can be adjusted from 0 001 meters increment to 100 meters increment The angle resolution can also be scaled from 0 001 degree increment to 10 degrees increment The ruler is easily moved around the field using the hotkey mouse combinations The visibility of the four components that make up the ruler can be toggled on and off individually All the ruler attributes are saved with each scene file Graduated scale Sliding Nose Tv Reference axis alignment widget Fixed Nose Measurement Tool control chart 3 Moves the tool at 4 right angles to it s Ut long axis if you iai 3 are facing the 4 graduated scale Moves the tool 4 along its long axis if you are 4 facing the 3 graduated scale Move X Cal Move Y A Shift Move Z Moves the tool Rotate Rotates the tool Down Up 4 up and down in Dec _Inc around its reference 5 gt the Z depth aN axis point Ctrl J axis Cul ey Mouse 4 Exit Movement Resolution Rotation Resolution Press the esc key deactivate the tool and regain the mouse pointer Increment or decrement the rotation resolution Increment or decrement the movement resolution for the adjus2. es Enter a value between 0 1 Arch Bias settings Vessel Heading 340 Vessel Position vell l Swell z a Simulate the effects of swell heave on the vessel and associated field 0 MWA will not respond to any elements tension differential 1 MWA will move to exactly balance any tension differential MWA rotation index The MWA saddle section will always rotate to face the turret area 0 MWA will not rotate ey a 1 MWA will rotate to exactly look at the turret area i gt r MWA height Turret Draught Vessel Draught Vessel Heading User set the MWA heights Set the Turret distance below Set the vessel bottom M the vessel base or bottom distance below the water line a Vessel image rotates to line The datum is the mooring line connection to reflect the vessel heading the chain guide j ag Arch Rotation Bias edit pra Hit enter key Event Left mouse pointer click in the edit box Hi hax Enter after data Result Edit box turns green HENS OPE entry Action Type in a new bias value for the MWA tilt or rotate then press enter Tilt Bias 1 Tilt Bias 0 5 aa High tilt factor Small tilt factor Small Buoyancy vector py AA E Large Buoyancy vector we J 1 a n m a ue f a1 oe D oo gt J i x Jute y L SAn A f gt Fi i i j 7 baide 7
3. aa _ re a sor ee Upper riser sag w Y u Sct T pa gt a height is lowered Nd a aR Ts te wo Ss i The images above illustrate the effects of the vessel moving off location by 30 meters in the Y plane and 35 meters in the X plane which results in a total excursion of 46 1 meters from the origin The vessel movement is the result of an external force 1e wind and not the result of mooring line adjustments so the mooring line lengths are constant The mooring alarm box appears when the vessel excursion exceeds approx 20 25 meters in any direction alerting the user that the anchors are about to be dragged in the vessels direction due to the extreme tension on that mooring line group The vessel movement effects all the dynamic parameters because everything is tied to the vessel turret Stated in another way vessel position effects the mooring and riser line catenary profiles which effect sag heights and line tensions The riser catenaries tension imbalance effect the MWA lean angles which effect the lower riser touchdown points The extreme MWA lean angle that is seen in the above image results in critical tensions on the lower riser catenary TD points close to the intermediate connectors which may part the lower riser lines The example above raised a This image shows the turret marker Limits Mooring fine mooring line alarm which position on the higher resolution radial indicates the anchors will be map 2
4. The only other models visible in dragged if the vessel this image are the low res MWA s The Limits Rear Arch Cat excursion continues It is also possible that any of the other catenary alarms might be raised under the right conditions radial maps give a quick distance indication from the field centre The distance readout gives a precise value of vessel excursion from the centre Vessel Position i Dynamics PtA PtB Run Frames PiA PIRES I es 50 I Event Left mouse pointer click on Pt A Pt B buttons Result Stores the two vessel positions Event Left mouse pointer click on Run button Result Vessel moves between PtA and PtB with full dynamics Event Left mouse pointer click in the Frames edit box Panada Edit box turns green y a Hila after data Edit box Action Type in the number of frames for the A B simulation turns green entry The user must ensure the scene complexity is not too high as to result in a slow frame rate for the simulation The frame rate will already be slow due to the large number of calculations required to determine the MWA behaviors and catenary profiles Event Left mouse pointer click in the Frames or Ap p edit box Hit enter key Edit box turns green en _ ati ee after data Action Type in the number of frames for swell simulation entry or the value of the swell peak peak amplitude
5. asje a pa i the scenes above show the effects of tilt bias on the MWA lean angles The tilt bias is be a measure of buoyancy which is the upward vector The two horizontal vectors are the opposing catenary tensions If the upward buoyancy vector is large compared to the horizontal vectors the arch structure will tend to float straight up with less tilt Rotation Bias See Rotation Bias 0 5 Straight line profile r with Rot bias 1 EA S 09 pIE E P F E E 5 MWA Z MWA If the rotation bias value is reduced the MWA pitch angle will be reduced and the MWA saddle section and catenary profile will not conform to the straight line between turret and Intermediate connectors The virtual ruler is used in the scene to illustrate the deviation from the straight tangent between turret and intermediate connections The image on the left shows the MWA profile as seen from the top with the vessel off location With a bias value set to 1 the MWA will pitch to establish a straight line between the turret connection and the intermediate connector when viewed from above This effect is demonstrated clearly with the center riser The virtual ruler has been used in the scene as a straight edge reference along side the center riser line Set water depth Set Vessel draught Set Turret draught Set MWA height Hit enter key Event Left mouse pointer click in the edit box
6. gt mra Enter after data Result Edit box turns green turns green entry Type in new values for the water depth vessel draught turret draught or MWA height then press enter Water depth Vessel draught _Y 5m 4 Water Depth gt Sea bed MWA Height Turret Draught Adjusting MWA height will effect the lean of the structure due to the catenary tension imbalance The MWA height datu actual height of the MWA may not be that specified in Centre of 4 the edit box eg the MWA on the left is upright for the saddle Turret draught datum is i height 57m The height of 50m is entered in the edit the exit point on the i y l box The MWA now exhibits considerable lean and chan euidesnouth j its actual height becomes 49 84m because of the l x y influence of the catenary tensions For this reason any change in MWA height will require catenary length adjustments Vessel heading D gt oa 2 OR Edit box Scene active Action Left mouse pointer click inside edit box turns red Edit box turns red Type in a new value for the vessel heading then press enter OR Press ctrl key and rotate mouse wheel to inc dec vessel heading by 1 Hit enter key Rotate mouse after data entry wheel to inc dec vessel heading Vessel heading 240 Vessel heading o i Dynamics Vessel Position PiA PiB Run Vessel A B Position Result Edit box s turns red Dec Gx Inc pm
7. of the keyboard Rotating the mouse wheel will adjust the camera s move response Consult the chart on the right for more information Esc exits the camera control routine and re enables the mouse pointer Exit Left Back Vessel Position B Vessel AB Frames 9 001 KB Bitmap Image 9KB FI File 9 001 KB Bitmap Image 9KB YFI File Camera settings slider panel opens _ Scene active Processing loop begins which results in a scene update rate of approx 20 frames sec The frame rate will drop as the calculations simulation complexity increase The FPS frames per second indicator begins flashing to indicate scene active The user can use this flash rate as well as the FPS readout to gauge the processor load presented by the scene Camera control chart Camera Move POV Move POV Point of view Fwd Dwn Left D Zoom hw 3 bs POV Move Rate Dec M Rght Ctrl Cam Move Rate Visible File visible Catenaries Dynamics Tools MwA Trees Maps Hoong Lines Flow Lines Visibility n Top ies TUI 2H L TLI 2H Inner Field Centre Centre a l Side ap I H TLI 3H J Mid Field ude Cutsides soa Body SMOKIAA 2H L AMOKURA 2F Large Fielc Tati T MEIR PATEKE 3H L PATEKE 3H Tree Maps Ww aber Radial Map 1 urre Lauran adal Map Turret Full L Radial Map 2 Turret Single See Set Vis Res esignator Toggle Set z
8. of the toggle the measuring tool from 0 3M to 3000M measurement tool orientation between Tool Rotation Adjust the vernier rotation by holding down the Alt key while rotating the mouse Resolution Increment or decrement the rotation resolution by pressing the 3 key dec or 4 key inc Location Readouts The X Y and Z readouts display the coordinate location of the measurement tool The World Co ordinates convention is used Tool Movements Move the tool in the X Y amp Z axis using the hotkey mouse combinations If you are looking at the graduated face of the ruler the movement conventions are Visible Slide Ruler a Base Ret Track Sliding Nose Fixed Nose Visible Show or hide the various components of the measuring tool wheel Readout in degrees This res setting applies j only to the tool rotation Shift Mouse Fwd Back Move ruler along its long axis Cntrl Mouse Left Right Move ruler at right angles to its long axis Cntrl Mouse L or R button Move ruler up and down Movement resolutions are determined by keys 1 inc and 2 dec flat and upright Measurement Tool Activate Event Left mouse pointer click on the Activate button Result Measurement tool becomes active Action Use the Hot Key Mouse combinations to move and adjust the ruler for field measurements Ruler components
9. 9 40 oS i tension h s t ba eS Moor Grp 1 Moor Grp 2 Average catenary 536 M Ear or Wig 25 32 Gas angle se Average tangent angle of all three catenary segments on both sides of the MWA indicates total tension difference Moor Grp 3 Ground Distance Catenary Distance MWA bias angle Sag height Catenary Ground Riser Mooring Length of the segment that Distance between the MWA Shows the MWA bias angle Height of the lowest jruns along the ground eee saddle attachment pt and that results from any catenary pt of the riser catenary Distance Distance Directory Directory Ee aa vets Gara ip catenary touch down pt tension imbalance Distance between Distance between Click on an item in Click on an item in and intermediate connector j mooring line high pt mooring line touch the directory to the directory to and touch down pt down pt and anchor select a catenary select a catenary i for display data for display data Dec fine cee Ee OR Gal cst Lower Riser Upper Riser Mooring o EE eeo f Event Left mouse pointer click in the edit box Result Edit box turns red scene active mi J pe Hit enter Rotate mouse Action Type in a new line length and hit the Enter key or after data entry wheel to inc dec selected line length Press the ctrl key and rotate the mouse
10. Enter E ey m OR Ctrl Se o Edit box Scene active Event Left mouse pointer click in X or Y box s turns red Hit enter key otate mouse after data entry wheel to inc dec vessel position Type in new values for the vessel x or y position then press enter OR P Press ctrl key and rotate mouse wheel to inc dec vessel x or y position by 1 Default vessel position Front view Critical vessel position Top View X 0 Y 0 X 35 Y 30 Force pushing on vessel Mooring touchdowns wey close to aN r vessel A Di S 165 Vy se l mB 4 i H ae 4 l l Extreme excursion eee a e Ai Straight line profile of MWA saddles i of Turret Saddle I k connector and centre riser Critical vessel position Front view A 3 5 ne 5 0 aes Mooring lines on this side become very slack and the Touchdown points move close to the MWA base radius Extreme tension on fj i a Unes f i MWA s lean away from Lower risers become slack and i the turret the touchdown points move away MWA s lean into f j i from the intermediate connectors the turret i j ig because of the MWA lean angle B Pa ii Bend radius may be a factor Extreme tension on aN F ff Si KN lower riser catenaries P ai W gt WW The TD s move toward the 140 Sam Ol j PON j intermediate connectors i P Ye A WY WAY because of the MWA tean i NY Ly A N _ ai A Upper riser sag he X I k paar oe i height is raised a rt
11. Event Left mouse pointer click on the Run button f Result Swell simulation begins Level displays the swell level water depth Depth displays the swell level water depth Level Depth The swell simulation is based on the trigonometric SIN function A p p Swell amplitude i peak peak Water Depth Tools Activate Click on this button to activate the virtual measurement tool effect Cartesian and angle measurements and movements Resolution ie from zero is displayed in the readout in meters Slider Nose Adjust Move the vernier nose by rotating the mouse wheel The offset value Increment or decrement the movement resolution by pressing the 1 key dec or 2 key inc This res setting applies to the nose movements and the tool Location Movements Offset Button Click this button to show the Offset Panel and enter X and Y values to add to the location readouts The Offset panel values on the right represent the FPSO turret centre eee Loc 0 reset the tool Click this button to location to the 0 0 0 Rot 0 Click this button to reset the tool rotation to 0 cs Visible Catenaries Dynamics Tels a S Vernier Tool Activate Seale MT Offset Loc Scale Meters Orientation Press the S key to Press the O key to increase the scale
12. Lines Centre Outsides Centre Mooring Line Tools page File Visible Catenaties Dynamics Tools Vernier Tool Scale M S Orientation 4 Value Meters Shder Nose Rotate rz Vernier Degrees s 0000 Al 0001 0 Resolution a Flow Lines Outsides Moor Grp 1 Moor Grp 2 Moor Grp 3 Location M Offset are 0 Be O ooo a x__o____ x wi Control the visibility and resolution of all models in the scene to reveal a field of high complexity or one of specific focus Use this page to dynamically adjust the lengths of riser and mooring line catenaries The large amounts of data generated from the variables is displayed graphical format including the MWA lean angles that result from any catenary tension imbalances Set buoyancy values for the MWA Set water depth Vessel draught turret draught and MWA height Adjust vessel heading and position Store A B points and enact dynamic movements between the points Simulate swell All adjustments interact with all other field elements for full simulations and dynamics The Tools page allows basic measurements of distances and angles in the field using a virtual slide ruler with adjustable calipers Visible Slide Ruler 203041 2 204 619 7516 500 Getting Started Input Device Many input device options were considered and tried including multi axis joystick and flight sim joystick however th
13. TUI Virtual Field AUSTRALI The TUI virtual field gives the user unprecedented insight and control over all aspects related to project planning design and visualization High level user interaction Provides a unique tool set for designers and planners Real time plotting and adjustment of riser and mooring line catenaries Touchdown and endpoints are mapped with critical data displayed in tabbed page format Mid Water Arch positions update as a function of tension balance which is effected by multiple vectors including vessel location line lengths MWA height and buoyancy all of which can be adjusted by the user Scenes can be stored and loaded and a full resolution screen print is saved with each file A dynamics page provides heave simulation and vessel movements can be recorded and played back 2D maps and 3D models are combined seamlessly as scene content Object visibility can be toggled to reveal a complex scene or one of specific focus Perform a virtual SIT complete with object and tether collision oe detections A Expand to incorporate external sensors such as GPS Pitch Roll gyro depth for real time updates on site or remote TUI Virtual Field TUI VF ver 1 Package Overview The TUI Virtual Field software has been developed in response to requests from the TUI project managers and the wider industry for a comprehensive application that en
14. capsulates catenary and dynamic simulations virtual camera control and navigation file save and open routines and field customization utilities This 1s the first release of that package which combines computer processing grunt with unique functionality and an elegant and intuitive user interface Great care has been taken to adhere to standard catenary equations and their derivatives so all profiles generated in the simulations are valid The application currently comprises 5 tabbed pages each providing specific functionality The following paragraphs provide a brief overview of each page s functionality followed by more detailed descriptions in subsequent pages File open and save buttons allow the user to store many virtual field configurations with bitmaps A notes sub page allows the user to record notes specific to the saved scene Complete control of the virtual camera is also accessed from this page SceneFilel Basic openinig scene Radial map 1 sin mooring lines lo Visible page File Visible Catenaries Dynamics Tools TUI 2H L UI 3H L AMOKJRA 2H L PATEKE 3H L urret Dummy Turret Full L l Turret Single Trees TLI 2H I TLI 3H AMOKUR 2 PATEKE 3H Catenaries page File Visible Catenaries Dynamics Tools Dynamics page File _ Visible Catenaries Dynamics Tools Maps Inner Field I Mid Field Large Fielc Tree Maps Radial Map 1 Radial Map 2 Moonng
15. cted Upper riser MWA angle MWA Lean angle Average Upper riser lean toward turret MWA angle lean away from turret Flow line selected No lines selected j Before Change After Change H Lower Upper Lower Upper 4 Lengths 159 4m 186 6m 205 6m 131 4m Single Angle 26 5 IED 9 6 37 6 Ave Angle 25 4 25 3 273 227 2 MWA Angle 0 67 8 1 The diagram on the left illustrates the dynamic response of the MWA to changing line lengths The default line lengths result in a MWA lean angle of 0 67 degrees which is essentially perpendicular to the ground or floating straight up The tension imbalance caused by shortening the upper riser and lengthening the lower riser causes the MWA to tilt towards the turret by an angle of 8 1 degrees The MWA will move to nullify the tension imbalance so the average angle on either side of the arch will be equal Dynamics AIB Vessel Vessel distanc Distance the vessel has position moved away from the e e z Swell Amplitude Edit box s Vessel Heading a a T oa 1 we A ee Set two positions between X 0 Y 0 location It is the ser set swell heave peak nter numeric data for nter a numeric value for which the vessel will move length of the hypotenuse to peak level Water Depth the user set values the vessel heading with full field dynamics of the XY triangle MWA Bouyancy A i Index Fie _ Visible Catenaries Dynamics Toos SAMMI ESS ia 4
16. e mouse and keyboard were used due to their pervasiveness and familiarity The mouse must have a scroll wheel which has been used extensively for data input The keyboard has also been used for hot keys ie input triggers beyond alpha numerics Launching the application Most developers of simulation software will use a 3rd party graphics engine which is controlled by their front end software This frees up the developer to focus on the specific application would I design an operating system to write a database application probably not Truespace 6 6 has been chosen as the 3D engine behind this application The virtual field scene is loaded automatically when truespace 1s launched The scene takes approx 10 secs to load due to its large file size A black screen appears after the scene has loaded Click on the small icon that appears on the bottom right of the screen This will launch the TUI Virtual Field Interface TUI VFI which will appear at the top Left of the screen When the TUI VFI has loaded a basic scene will appear which is a perspective of the FPSO with low res MWA s radial ground map and central risers There are other ways to launch the scene An obvious one is to click on the scene icon in windows explorer which tells Truespace to load with this scene Launch the 3D graphics engine by clicking this icon on the desktop screen TUI Field VR Click on the icon at the bottom right of the opening screen to
17. e the 285 471 meters of 243 11 degrees display the turret center as the ground level so the ruler The ruler scale has ruler base location can be sen above the map been set to 300 meters Fis Visbie Caena Dmae oo ERENT ST Vernier Tool N Value Meters Degrees Resolution Nocation M Offset Orientation icon Scale OM Slider 01 x 2 530 412 204 shows the ruler is in 800 0 me No EXE e 1 6 197 516 500 the flat position 4 gt B maral 74 243 110 A Lo g 7300 Height ground referenced of turret umbilical connector base The ruler has been positioned in an upright orientation to measure the height of the turret umbilical connector base The measurement was facilitated by clicking the loc 0 button which instantly snaps the ruler base to the turret center on the ground The ruler X and Y position and slider nose offset was then adjusted until the nose edge intersected with the target object The caliber offset No rotation data is The X and Y world The ruler height Z is on has been set to displayed when the referenced co ordinates the ground plane 0 113 19 meters ruler is upright display the turret center as the height The ruler scale has ruler base location been set to 300 _ meters fie ate Lea Owo Toe Pee CU Value Meters Degrees Resolution Orientation icon Stes as REERLCAH E o1 x 2 530 41 8 204 shows the ruler is in y 6 197 511 900 the upright position Conclusion The field pa
18. esolution designator a small resolution menu appears A left click on either the H or L label will set the object s resolution to high or low Only objects with a high number of polygons have this option ie the turret and MWA structures It will be essential to set the MWA structures to low resolution during all camera and simulation operations otherwise the frame rate will be too low Likewise only the dummy turret should be visible during dynamic operations When the camera is in position and dynamics switched off the objects can be switched to high resolutions for presentation or screen shots These pictures show the contrast between High and Low resolutions MWA High Res MWA Low Res Turret High Res Turret Low Res Catenaries i _ Catenary Limits p lt a Total Riser length f Catenary lengths lt 9 An Riser hi ch Pt Mooring high Pt P E Total length of line inc rear and Enter a value or inc dec lengths length n hes been d Highest pt of the riser Highest pt of the Pente turret side of MWA with ctrl and mouse wheel exceeded catenary connection ee connection to chain S guide Selected catenary a a angle File Visible Catenaries LEgnamics Loc mts Mooinooi B o Full Riser Mooring Line Tangent angle of the first m Aw n a g g Riser LT 346 00 Upper Riser im Mooring catenary segment on both sides of the MWA is a measure of i 15
19. launch the TUI field interface S Further clicks on this icon will toggle the visibility of the TUI VFI Diaries The default scene appears FPSO Low res MWA central risers as well as the TUI VFI If at any stage you wish to hide the VFI click again on the orange icon at the bottom RHS of screen The VFI application will disappear Click again on the orange icon on the bottom right of the screen and the application will re appear This may be useful if you wish to capture the screen although there is a better way to do this from the file page or show the full image without the interface f File Tabbed pages Filename Active indicator Open fie visible Catenaries Dynamics Tools Moi function readout File T aceneFilel Save esata se Basic openinig scene Camera settings File Radial map 1 single risers no Sliders mooring lines lo res My ATs Displays Zoom eye Point of view POV response Camera and camera movement t l response contro Displays the bitmap image l Displays notes entered and associated with each file p ay saved with each file Image thumbnail Note pad Opening scene When the VFI application loads a basic scene is displayed similar to the one shown The camera angle is very wide low zoom with a perspective view of the TUI field centre The FPSO top map and body are sh
20. n which contains all the 3D models maps lights and camera This file is never changed or saved to and the user will probably never encounter this file under normal use A VFI file on the other hand is created for each TUI field The VFI file contains all the functions procedures and saved properties for scene customization and simulations The VFI application requires that both files VFI amp bmp be in the same directory when opening TULSCN Truespace 6 6 VFI i File 1 VFI Truespace file 3D Graphics Engine A Virtual Field Interface File 2 VFI pie dl as File 3 VFI File 1 BMP Helas a gt File E Save file Event Left mouse pointer click on the button The VFI files are small approx 10kb The bmp files are approx 9 Mb for a screen res 1920 x 1200 The user will probably have many saved files in Xesult familiar windows Save file dialog box appears RE rae a file name and save a VFI file with it s associated bitmap bmp of your configured scene or cancel AJ SceneFile1 E SceneFilet FI multiple directories the largest files being the screen images The image on the S SceneFile2 right shows the pairing of VFI files and BMP files in the same directory E SceneFile2 vFI Everything in the scene is saved including camera location and zoom The scene file record is shown in the table below VFI file The table below is the record of parameters saved wi
21. own but only the dummy turret is visible Center riser lines are visible The mooring lines are not shown The turret has a center marker bright green placed directly beneath it on the ground This helps to identify the turret X amp Y position when the vessel moves The MWA structures are low resolution ie only a small number of polygons have been used for their models All the high resolution models are also in the scene and its entirely up to the user to determine scene complexity Scenes can be customized by altering many properties such as model visibility catenary lengths vessel position draughts heights and buoyancy Adjust the camera position using the mouse hotkey combinations and become familiar with the camera control concepts Open file f Event Left mouse pointer click on the button Result familiar windows open file dialog box appears Action Select a VFI file Virtual field Interface to open or cancel The VFI thumbnail viewer displays the bitmap bmp that is stored with each VFI file The bitmpap is full screen resolution and having it as a separate file allows you to use it in any graphics application or presentation The file name is displayed above the note pad Saved notes are displayed in the notepad The distinction should now be drawn between the VFI file and the single Truespace 6 6 base file specific to this application The base file is a native Truespace 6 6 read only format sc
22. point for the full riser is the intermediate connector and the anchor for the mooring line Notice the touchdown blue marker moving closer to the end point red marker as the catenary length decreases Catenaries Full Riser Mooring Line Riser directory Mooring line directory Left mouse pointer click on a directory sub item Selects a riser or mooring line for display data and adjustment The selected catenary is identified by it s increased radius The riser tree view presents 4 groups of 3 risers one group for each XMAS tree Click on a specific riser to select it as the data focus All the numeric data displayed in the catenary page will pertain to this selection Any changes in line length will be particular to this selection The mooring line tree view has 3 groups of 3 mooring lines Click on a specific mooring line to select it as the mooring data focus When a riser or mooring line 1s selected in the directory the radius of the selected line will increase for identification Click again on the same selection in the directory and the radius will toggle back to its default size The MWA is balanced when the lower riser angle is the reciprocal of the upper riser angle WA Upper MWA Lower rier angle riser angle Upper Riser catenary length decreased Lower Riser catenary length f l increased f Selected lower riser KSE MWA angle Average lower riser MWA angle Sele
23. rameters that have been provided for this simulation have resulted in reasonably balanced MWA profiles If the MWA heights vessel offset or catenary lengths had been different the MWA would not have reflected such an upright demeanor as has been illustrated in this document Whoever tuned the field has done a good job There are some minor discrepancies with the touchdown points of the lower risers Refer to the image below for further analysis Note the slight discrepancies between the projected lower riser catenary touchdown points on the field map and the actual catenary touchdowns at the blue markers There is a slight lean in all the MWA s in towards the turret This can be seen in the image on the left when compared to the upright measurement marker This indicates a slight imbalance in the catenary lengths Intermediate Turret connector side side The user of this software should keep in mind that this application has been developed primarily as a visualisation tool There are many parameters that have not been provided and or factored into the simulations that may account for the slight discrepancies outlined above We welcome and encourage any feedback about the package so please keep the dialog open and provide us with all your thoughts and comments pertaining to the package and it s delivery
24. table nose and tool location Esc 1 2 Dec Inc 3 4 Dec Inc Measurement Examples MWA Buoyancy tank height and diameter The ruler has been positioned in an upright orientation to measure the height of the MWA buoyancy tank base and the diameter of this tank The caliber offset No rotation data is An X and Y offsethas The Z panel displays has been set to 2 000 displayed when the been added which is the the height of the ruler meters ruler is upright turret center in WORLD base reference The ruler scale has Co ordinates been set to 30 meters Vernier Tool Activate Value YMVieters Degrees Resolution RTS o Bus 0 Visible z P EaR In P lide Ruler Orientation icon e Slider 001 SB 2 530 438 315 Shit 45 iy Ben Pe n a Nose shows the ruler isin Skad Orientation Y 6 197 435 271 4i Ctrl i Lo a 54 1 318 L _ i EJ Fined Nose the upright position Center mooring line touchdown distance and angle from the turret center The ruler has been positioned in a flat orientation to measure the distance between the turret center and the center mooring line touchdown point The measurement was facilitated by clicking the loc 0 button which instantly snaps the ruler base to the turret center on the ground The caliber offset The ruler has been The X and Y world The ruler height Z is has been set to rotated to an angle of referenced co ordinates raised slightly abov
25. th each file Extra parameters may be added as the application is expanded Doc s File Name Notes Camera Camera Location Camera Rotation Canera Zoom Camera Movement Response Camera POV Point of view response Camera Control Catenary lengths Visibility Upper Riser Catenary Lengths an Lower Riser Catenary Lengths Model Visible Resolution Records Mooring Line Lengths MWA Vessel Vessel Heading MWA Tilt Bias Vessel Draught MWA Rotation Bias Turret Draught MWAHeight Water Depth Vessel Location Vessel Position A Swell Swell Frames Swell Amplitude p p Event Left mouse pointer click on the button 1 gt a ne active m o gt a _ Result Camera becomes active mouse pointer inactive The camera settings slider panel opens Scene active Use the Hot key s mouse combinations for camera placement and operation All aspects of camera movement and placement are controlled by the mouse and hot keys Ctrl L or R mouse buttons control camera zoom The mouse X amp Y position determine the camera POV point of view much like a pan and tilt camera Ctrl mouse wheel alters the POV response ie POV response should be set low with high zoom otherwise a small mouse X Y movement will result in a rapid sweep of the scene Moving the camera in the scene is achieved with the W A D Z key group on the left
26. visibility E Resolution TUI 2H CheckBox Mouse From Event Left mouse pointer click in the check box Result Clears or sets the checkbox tick and toggles the visibility of the specific object Action Set or clear the visibility of any scene elements specified in this page This is a very straightforward page The checkbox reflects the object s current state ie if the checkbox is ticked the object is visible Clicking inside a checkbox will toggle change the visibility of the object specified in it s accompanying text As more objects are shown more burden is placed on the computer s processor so the user may see a reduction in frames per sec as more complex objects are shown This may result in stuttered updates when moving the camera or running simulation routines such as vessel moves For these reasons the user should use discretion when showing objects The user should also exercise caution when showing large maps ie Mid Field amp Large Field when the camera is close to the ground as this may create some vertex distortions The user can toggle the visibility of these and other scene models l XMAS Tree Connectors Turret Caison Vessel MWA Saddle MWA Base Turret Full CheckBox Event Right mouse pointer click on the checkbox or label Result Opens the resolution menu Action Left click on H or L to set the object resolution If the user right clicks over a checkbox that has a blue r
27. wheel to adjust the selected line length by 1 The edit box will turn red when the user left mouse clicks inside the box Hold down the Ctrl key and rotate the to change the numeric value and the catenary length dynamically Alternatively enter a numeric value into the box and press enter to change the catenary length The return key must be hit if a number has been entered directly into the edit box Ifa number is entered and the user changes focus to another control without hitting the return key the value in the edit box will revert back to the last saved value and will not be entered into the VFI record ET Oye of these alarms will appear if the catenary length constraint is exceeded A left mouse click in the red alarm box will erase it The user should then type a valid length into the appropriate edit box and press the enter key The images below show the mooring and riser catenaries at default lengths and critically shortened lengths Limits Rear Arch Cat Riser Catenaries Default upper riser catenary length Critically short lower riser catenary Default lower riser length 7 catenary length Critically short upper riser catenary length End point markers red Touchdown markers blue Mooring line catenary with Default length i Mooring line catenary with Critically short length i The blue marker designates a catenary touchdown point The red marker designates the end point The end
Download Pdf Manuals
Related Search