舰船典型结构冲击仿真模型前处理方法研究

Pretreatment Method Study on Typical Structure Shock Simulation of Ships

有限元仿真方法是研究和考核舰船结构及舰载设备抗冲击的重要手段,板梁是舰船及其设备中最普遍的结构,其仿真精度对舰船抗冲击设计有重要影响。设计了不同尺寸的悬臂梁和板架结构,在相同的冲击环境下进行了冲击试验和不同前处理方法的仿真计算,通过对比试验与仿真结果,研究了有限元单元的长宽比、形状、类型、求解方法、单元耦合方式等前处理方法对于板梁结构冲击仿真精度的影响。研究得到:单元长宽比接近1∶1、采用缩减积分、实体与壳体耦合等方法能有效提高仿真精度,对舰船结构的有限元仿真提供一定参考。

Finite element simulation is an important means of research and evaluation of ship structure and equipment under shock environment.Plate girder structure is widely used in the ships,so the simulation quality of the plate girder structure makes a significant effect on the shock design of ships.Designed a series of cantilever and board structure,and carried out shock test and simulation under same shock environment,studied the effects on the finite element simulation accuracy of the element aspect ratio,shape,style,solving method,coupling method by comparing the results of test and simulation.It could be found that when element aspect ratio nearly 1∶1,Reduce Integration and solid-shell coupling methods can greatly improve the simulation quality which can be used to guide the finite element simulation of ships.