舰船管路冲击响应的离散时间传递矩阵法

Shock response analysis of naval piping system based on discrete-time transfer matrix method

摘要:

为求解舰船管路在冲击载荷作用下的响应，应用离散时间精细传递矩阵法，编制计算程序，对管路冲击响应进行模拟，形成了一套管路冲击响应计算方法.设计管路冲击试验，对方法进行验证，结果表明，基于离散时间精细传递矩阵法的管路冲击响应计算方法精度较高；同时，建立弯头管路和三通管路有限元模型，与离散时间传递矩阵方法计算结果进行对比，提出的方法既保证了较高的计算精度，同时计算时间大为降低，效率明显提高，可以为管路冲击响应预报和抗冲击设计校核计算提供指导和参考.

Abstract:

In order to simulate the hull piping transient response subjected to an impact load, a discrete-time precise transfer matrix method was applied to write a program and simulate the shock response of naval piping system. By comparing the calculated results from the proposed algorithm with those from the pipe impact test, the validity of the method was verified. The results show that the calculated results of the acceleration and stress was precise. The finite element models of the elbows and tees were established, and the transient response of the ship pipes under impact load was analyzed. The results calculated by the new proposed method were compared with those obtained by the finite element method. The results show that discrete-time precise transfer matrix method holds a substantial reduction in computation time with high accuracy. The new method gives a reference to calculate the shock response and evaluate the shock resistance ability.