Finite element core solution: Added modules for ship structure inertia release and submodel analysis; Improved the engineering correction algorithm for the stiffness matrix of ship plate beam elements, and benchmarked the relevant modules against NASTRAN with an accuracy error of less than 1%; Optimize the storage mode of sparse matrices for linear algebraic equations in the underlying algorithm library, significantly reducing computational memory consumption.

Professional evaluation subsystem: Targeting the application scenarios of ship structure, deeply integrating expert knowledge such as classification society standard verification methods, the professional evaluation modules of the four major professional subsystems have increased from 12 to 16, significantly improving evaluation performance and being more professional than ordinary commercial software. In response to the application scenarios of ship structure engineering, the deep integration of expert knowledge such as classification society standard verification methods has increased the number of professional evaluation modules in the four major professional subsystems from 12 to 16, significantly improving the evaluation performance and making it more professional than ordinary commercial software.

3、FUNCTION

3.1 Finite element solution

It includes commonly used structural finite element analysis functions such as static analysis, modal analysis, steady-state analysis, transient analysis, and contact analysis. Through a unified data interface, it supports the evaluation and coupling of various specialties in marine structural analysis, and can achieve:
1. Overall process based on incremental iteration method and open object-oriented architecture design
2. Various basic libraries with structural analysis capabilities, supporting custom units, materials, and other extensions
3. The accuracy is comparable to that of commercial structural CAE software

Display of Finite Element Modal Analysis Results

3.2 Environmental Load Assessment
Based on complex wave environment water wave models, three-dimensional hydroelasticity theory, mooring dynamics, generalized Wangner method, and discrete element method, it is possible to achieve:
1. Complex environmental forecasting
2. Wave load forecasting
3. Dynamic analysis of mooring system
4. Bangbang Upward Wave Analysis
5. Ice load analysis

Environmental Load Assessment Display Diagram

3.3 Structural Safety Assessment
Based on theories such as the ideal structural element method, cumulative damage method, orthotropic plate elastic large deflection theory, genetic algorithm, and logical fuzzy model, it is possible to achieve:
1. Ultimate strength analysis
2. Fatigue strength analysis
3. Buckling strength analysis
4. Risk analysis
5. Optimize design

Structural Safety Assessment Display Diagram

3.4 Vibration and Noise Assessment
Based on theories such as three-dimensional acoustic elasticity theory, statistical energy method, dynamic stiffness method, power flow method, and energy finite element method, it is possible to achieve:
1. Structural noise analysis
2. Efficiency analysis of vibration isolation system
3. Cabin noise analysis
4. Underwater noise analysis
5. Analysis of Sound Target Intensity

Vibration and Noise Assessment Display Diagram

3.5 Explosion Impact Assessment
Based on theories such as underwater explosion theory, second-order double asymptotic method, dense modal analysis method, and structural dynamics, it is possible to achieve:
1. Prediction of underwater explosion load
2. Impact environment forecast
3. Impact resistance assessment of equipment
4. Analysis of near-field explosion damage effects
5. Collision and grounding analysis

Explosion impact assessment display diagram

4、Software Features

Specialization: capable of covering various application scenarios required for ship structural performance analysis.
High precision: As the largest experimental base in the country, 702 Institute has rich theoretical and data accumulation. The software has undergone systematic verification and algorithm correction during development, debugging, and testing. Therefore, in certain application scenarios, the calculation results of SAM software are closer to physical experimental results than those of foreign software.
High efficiency: A template has been specially designed for ship structure modeling in pre-processing, making modeling more convenient. In terms of solving efficiency, we cooperated with Wuxi Shenwei the Taihu Lake Zhiguang to greatly improve the efficient parallel computing capability.