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1

Virtual Test Calculating Module of Platform Motion in Limit Sea State

2

Virtual Experiment Computation Module for Mesoscale Oceanic Flow Field

3

Propeller Cavitation Excitation Force Viscous Flow Calculation Module

4

Virtual test calculation module for ship roll damping

5

Wave increasing block virtual experiment calculating module

6

Fast self - model flight virtual test calculation module

7

Platform for Virtual Reality Computation in Operating Sea States

8

Virtual Experiment Calculation Module of Ship Motion

9

VIM Virtual Experiment Calculation Module for Vortex Excitation

10

VIV VIV fin virtual test calculation module

11

VIV VIV fast virtual test calculation module

12

Platform wind and flow force virtual test calculation module

13

Free water attenuation virtual test calculation module

14

Potential viscous fluid coupling (rectangular grid) ocean environment flow field virtual test calculation module

15

Potential viscous fluid coupling (aptamer mesh) ocean environment flow field virtual test calculation module

16

Virtual Experiment Computation Module for Large Scale Ocean Environment Flow Field

17

Constraint module and autopilot virtual test calculation module

18

Computation Module of Virtual Test Based on

19

Calculation Module of Propeller Cavitation Excitation Force Surface Method

20

Ship model self - flight virtual test calculation module

21

Virtual Experiment and Calculation Module of Propeller Open Water

22

Virtual test calculation module of ship model resistance
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Test type

Virtual Experiment Calculation Module of Ship Motion

add date£º29/07/2017    hits£º


Test flow
According to the value of hull geometry modeling, such as modeling of bilge keel;
• establish flow models (air-water two-phase flow, turbulence models, etc.);
Creating watershed grids;
• determine initial values and boundary conditions for forced roll motion of the hull;
Setting dynamic mesh technology, determining pressure, speed, coupling algorithm, spatial discretization scheme, etc.;
Perform calculations to obtain forced roll hydrodynamic moments;
To obtain the damping coefficient of the rolling force, and obtain the viscous damping contribution after the potential flow and wave damping separation;


 
Functional and algorithm requirements
- contains the bilge keel, for wood, fixed fin viscous flow simulation function;
• has simulated zero speed and forced roll motion at speed;
• the forced rolling amplitude can reach 30-40 degrees for container ships, and the dynamic stability assessment is required to estimate the roll damping;
• turbulence models should include two equations k- epsilon (Standard, RNG, realizable) and k- omega (Standard, SST) models with near wall function processing functions;
• pressure velocity coupling should include the SIMPLE algorithm, and convection interpolation uses the two order upwind scheme;
In order to adapt to the roll motion of ships, the moving mesh technique is adopted, which includes slip, spring stretch and reconstruction, and the moving mesh technique of river basin;
After forced roll simulation, the rolling hydrodynamic moment is required, and the hydrostatic force is removed in the result.
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