OrcaFlex Manual - Orcina

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User Interface, Introduction 3.1.3 Model States 26 w OrcaFlex builds and analyses a mathematical model of the system being analysed, the model being built up from a series of interconnected objects, such as Lines, Vessels and Buoys. For more details see Modelling and Analysis. OrcaFlex works on the model by moving through a sequence of states, the current state being shown on the status bar. The following diagram shows the sequence of states used and the actions, results etc. available in each state. Reset SIMULATION UNSTABLE Figure: Model States The states used are as follows: Reset Calculate Static Position RESET Calculating Statics STATICS COMPLETE Run Simulating SIMULATION COMPLETE Pause Run Reset Edit or Reset SIMULATION PAUSED Extend Simulation Reset Reset The state in which OrcaFlex starts. In Reset state you can freely change the model and edit the data. No results are available. Calculating Statics OrcaFlex is calculating the statics position of the model. You can abort the calculation by CLICKING the Reset button. Statics Complete The statics calculation is complete and the static position results are available. You are allowed to make changes to the model when in this state but if you make any changes (except for very minor changes like colours used) then the model will be automatically reset and the statics results will be lost. Simulating The dynamic simulation is running. The results of the simulation so far are available and you can examine the model data, but only make minor changes (e.g. colours used). You cannot store the simulation to a file while simulating – you must pause the simulation first.
w Simulation Paused 27 User Interface, Introduction There is a simulation active, but it is paused. The results so far are available and you can examine the model data. You can also store the part-run simulation to a file. Simulation Complete The simulation is complete. The simulation results are available and you can store the results to a simulation file for later examination. You must reset the model, by CLICKING on the Reset button, before significant changes to the model can be made. You can use the Extend Dynamic Simulation facility if you wish to simulate for a further period of time. Simulation Unstable The simulation has become unstable. The simulation results are available and you can store the results to a simulation file for later examination. This allows you to try and understand why the simulation has become unstable. You may also want to examine the results up until the point at which the simulation became unstable. However, please treat these results with caution – because the simulation eventually went unstable this indicates that the dynamic simulation may not have converged at earlier simulation times. You must reset the model, by CLICKING on the Reset button, before significant changes to the model can be made. Typical model state flow To illustrate how model states work, here is an example of a typical working pattern: 1. In Reset state, open a new model from a data file or use the current model as the starting point for a new model. 2. In Reset state, add or remove objects and edit the model data as required for the new model. It is generally best to use a very simple model in the early stages of design and only add more features when the simple model is satisfactory. 3. Run a static analysis (to get to Statics Complete state) and examine the static position results. Make any corrections to the model that are needed – this will automatically reset the model. Steps (2) and (3) are repeated as required. 4. Run a simulation and monitor the results during the simulation (in Simulating state). 5. If further changes to the model are needed then Reset the model and edit the model accordingly. Steps (2) to (5) are repeated as required. 6. Finalise the model, perhaps improving the discretisation (for example by reducing the time step sizes or increasing the number of segments used for Lines). Run a final complete simulation (to reach Simulation Complete state) and generate reports using the results. 3.1.4 Toolbar The toolbar holds a variety of buttons that provide quick access to the most frequently used menu items. The selection of buttons available varies with the current Program State. Button Action Equivalent Menu Item Open File | Open Save File | Save Model Browser Model | Model Browser New Vessel Model | New Vessel New Line Model | New Line New 6D Buoy Model | New 6D Buoy New 3D Buoy Model | New 3D Buoy New Winch Model | New Winch New Link Model | New Link
Page 1: w Orcina Ltd. Daltongate Ulverston
Page 4 and 5: Contents 4 w 3.4 Libraries 40 3.4.1
Page 6 and 7: Contents 6 w 5.6 Dynamic Analysis 1
Page 8 and 9: Contents 8 w 6.5.23 Wave Scatter Co
Page 10 and 11: Contents 10 w 8.12 Results 444 8.13
Page 12 and 13: Introduction, Installing OrcaFlex
Page 14 and 15: Introduction, Parallel Processing M
Page 16 and 17: Introduction, References and Links
Page 18 and 19: Introduction, References and Links
Page 21 and 22: w 2 TUTORIAL 2.1 GETTING STARTED 21
Page 23 and 24: w 23 Tutorial, Dynamic Analysis sha
Page 25: w 3 USER INTERFACE 3.1 INTRODUCTION
Page 29 and 30: w Keys on Main Window New model Ope
Page 31 and 32: w Rotate viewpoint left (decrement
Page 33 and 34: w General: StaticsMethod: Whole Sys
Page 35 and 36: w A text data file saved by OrcaFle
Page 37 and 38: w 37 User Interface, Model Browser
Page 39 and 40: w Cut/Copy Cut or Copy the selected
Page 41 and 42: w 3.4.1 Using Libraries 41 User Int
Page 43 and 44: w 43 User Interface, Libraries Once
Page 45 and 46: w 3.5.1 File Menu New Deletes all o
Page 47 and 48: w New Vessel New Line New 6D Buoy N
Page 49 and 50: w 3.5.5 View Menu Change Graphics M
Page 51 and 52: w Preferences 51 User Interface, Me
Page 53 and 54: w 53 User Interface, 3D Views 3D Vi
Page 55 and 56: w 55 User Interface, 3D Views � D
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Page 61 and 62: w Replay Period 61 User Interface,
Page 63 and 64: w Frame interval in real time 63 Us
Page 65 and 66: w Numeric 65 User Interface, Data F
Page 67 and 68: w � For lines you must specify th
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Page 75 and 76: w Results 75 User Interface, Result
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w Replays 77 User Interface, Graphs
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w Axes 79 User Interface, Spreadshe
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w Command Line Parameters 81 User I
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w Wire Frame Graphics Codec 83 User
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Automation, Batch Processing Multi-
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Automation, Batch Processing 88 w N
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Automation, Text Data Files Data in
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Automation, Text Data Files SHEAR7L
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Automation, Text Data Files 4.3.2 A
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Automation, Post-processing 108 w F
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w 5 THEORY 5.1 COORDINATE SYSTEMS 1
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w 125 Theory, Object Connections Di
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w 127 Theory, Static Analysis Final
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w 129 Theory, Static Analysis metho
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w 131 Theory, Dynamic Analysis for
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w Static Starting Position Simulati
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w 135 Theory, Friction Theory The n
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w where μ = magnitude of the vecto
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w 139 Theory, Extreme Value Statist
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w where σ = GPD scale parameter ξ
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w 143 Theory, Environment Theory Th
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w where Pu(z) = Nc(z/D)su(z)D Pu-su
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w 147 Theory, Environment Theory
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w Repenetration Offset After Uplift
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w 151 Theory, Environment Theory sp
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w Extrapolation Stretching 153 Theo
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w 155 Theory, Environment Theory st
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w 157 Theory, Vessel Theory individ
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w 159 Theory, Vessel Theory RAOs ca
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w 161 Theory, Vessel Theory Notes:
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w 163 Theory, Vessel Theory ω is t
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w surge/sway/heave M M.L roll/pitch
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w 167 Theory, Vessel Theory that co
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w 169 Theory, Vessel Theory separat
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w 171 Theory, Vessel Theory At this
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w Segment 1 Segment 2 Segment 3 Act
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w 175 Theory, Line Theory � If to
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w where component of M2 in the Sx2
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w The hysteresis model is described
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w � (90,90,90) sets Ex along -GX,
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w = v1 + p' + ω×p Therefore its a
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w y End A Stress ID z Stress OD O S
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w 5.12.16 Hydrodynamic and Aerodyna
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w 189 Theory, Line Theory Another w
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w Drag Chain Seabed Interaction 191
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w 193 Theory, Line Theory OrcaFlex
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w 195 Theory, 6D Buoy Theory clashi
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w 197 Theory, 6D Buoy Theory For Lu
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w 199 Theory, 6D Buoy Theory (due t
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w 201 Theory, 6D Buoy Theory Note:
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w α is the angle between the relat
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w 5.13.6 Contact Forces Contact For
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w Dynamic Analysis 207 Theory, Winc
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w 209 Theory, Shape Theory Finally,
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System Modelling: Data and Results,
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