1. Software overview

Three Dimension Hydroelastic Analysis of Floating and Travelling Structures is a commercial CAE software for solid coupling performance analysis of Marine structure logistics, which is developed on the basis of technology accumulation and innovation in the field of three-dimensional hydroelasticity by China Ship Scientific Research Center. The core computing module of THAFTS software includes frequency-domain hydroelastic analysis, time-domain hydroelastic analysis, mooring performance analysis, net curtain floating body hydroelastic analysis, and wave environment simulation near islands and reefs. It covers frequency-domain and time-domain, linear and nonlinear analysis methods, and has functions such as motion and load prediction and fatigue life analysis. It provides a powerful computational tool and analytical means for the safety evaluation of structures. The software has a friendly interface and strong interaction, and has been widely commercialized and applied in engineering, and has achieved good application results.

THAFTS软件界面展示图

2. Software feature

3. R&D process

2011 THAFTS software version V1.0: with frequency domain hydroelastic and time domain hydroelastic calculation function.

2018 COMPASS THAFTS: A new open architecture with frequency domain hydroelastic and time domain hydroelastic computing modules.

2020 THAFTS software version V2.0: New floating system mooring analysis module.

2021 THAFTS software version V3.0: New wave environment simulation and curtain floating body hydroelastic calculation module.

4. Software architecture

The software builds the overall platform architecture, forming the overall software architecture of 1 platform (software integration platform) +5 core (frequency domain hydroelasticity, time domain hydroelasticity, wave environment simulation, mooring analysis, net curtain float) +3 directions (environmental load, structural safety, motion performance) +N application scenarios. It provides a powerful calculation tool and analysis means for the safety evaluation of ships and offshore structures.

THAFTS software architecture illustration

5. Software functions

5.1 Hydroelastic calculation in frequency domain
Based on the three-dimensional hydroelasticity theory in the frequency domain, using the pulsating source Green function and the moving pulsating source Green function, it can achieve:
1. Hydroelastic response analysis in frequency domain without speed
2. Low speed frequency domain hydroelastic response analysis
3. High speed frequency domain hydroelastic response analysis

5.2 Time domain hydroelastic calculation
Based on Rankine source method and Wangner bang theory, it can achieve:
1. Nonlinear wave force calculation
2. Floating body wave surface elevation calculation
3. Analysis of floating body slamming flutter response
4. Real-time simulation of floating body posture and load

5.3 Analysis of mooring performance of floating system
Based on three-dimensional hydroelasticity theory in frequency domain and second-order nonlinear hydroelasticity theory, time-domain motion equation and mooring catenary theory can be used to achieve:
1. Second order wave calculation of floating body
2. Calculation of the initial equilibrium position of the mooring float
3. Mooring cable pretension calculation
4. Real-time tension calculation of mooring lines
5. Mooring float motion calculation

5.4 Calculation of water elasticity of screen curtain float
Based on the three-dimensional hydroelastic theory, combined with the screen model of the mesh coat, it can achieve:
1. Dynamic load calculation of mesh water
2. Calculation of the hydroelastic response of the floating body

5.5 Wave environment simulation
The non-uniform incident wave generation method based on Boussinesq equation can achieve:
1. Small scale inhomogeneous incident wave
2. Large scale inhomogeneous incident wave
3. Multi-scale complex environment forecast

5.6 Analysis of typical structural performance
Based on the calculation results of the core calculation module, through spectral analysis, profile modal load superposition and other methods, we can achieve:
1. Long and short term prediction of motion, load, stress, etc
2. Fatigue life analysis
3. Section load calculation
4. Hot spot stress calculation
5. Free liquid level animation display

6. Typical applications

(1) Hydroelastic response and mooring calculation of multi-module platform

(2) Hydroelastic response calculation of tourism platform

(4) Analysis of hydroelastic response of aquaculture platform