基于ANSYS的高精度管路系统抗冲击仿真方法及试验验证

针对船舶管路系统抗冲击性能仿真方法精度不足的问题,研究用于舰船管路系统的高精度抗冲击仿真方法。采用ANSYS有限元实体建模技术、冲击时域分析法对空间管路系统抗冲击性能进行研究,搭建管路系统抗冲击试验平台,对不同冲击载荷下管路系统的抗冲击性能进行试验验证,最后以舰艇典型管路系统为算例,研究三向冲击载荷作用下舰船管路的抗冲击性能。研究给出了基于接触单元、弹性约束、实体附件单元等高精确的管路建模技术,提出了船舶管路抗冲击时域仿真流程。研究表明,采用时域分析法和实体建模技术满足抗冲击仿真高精度的要求,舰船空间管路系统的横向抗冲击性能较差,法兰、直角弯管处、连接支管处等部位为管路系统薄弱结构。根据仿真结果,文章还提出了一系列用于工程实践的管路优化布置方法。

High precision simulation method of pipeline system based on ANSYS and test verification of anti-shock performance

In order to solve the problem of low precision of the simulation method of the impact resistance for the ship piping system, impact simulation method with high precision for the pipeline system is studied. Three-dimensional modeling technology of ANSYS and time domain analysis method are used to study the impact resistance of the pipeline system. Impact test platform for pipeline system is constructed to verify the impact resistance performance of pipeline system under different impact loads. Finally, taking the typical pipeline system as an example, the impact resistance performance of the pipeline under the three direction impact load is studied. In this paper, a precise modeling technique for pipeline system is presented, which is based on the contact element, elastic constraint and solid attachment unit. The time domain simulation flow for impact resistance of ship pipeline is developed. The research shows that the time domain analysis method and the solid modeling technology meet the requirement of high precision; transverse impact resistance performance of spatial pipeline system is poor; flange, elbow, connecting branch pipes parts are the weak structure of pipeline system. According to the simulation results, a series of pipeline optimization methods can be applied to engineering practice are put forward .