舰艇用三向管道支吊架抗冲击性能分析

Shock Resistance Ability Analysis of the Tri-dimensional Pipe Hangers in Naval Ships

舰艇内部错综复杂的管道系统是舰艇抗冲击性能的薄弱环节。为提高船舰艇管道系统的抗冲击性能,提出一种三向管道支吊架,并设计一套管道系统,分别采用普通单向支吊架和三向支吊架支撑管道。以弹簧单元模拟支吊架,施加相同的冲击载荷计算比较两种支吊架抗冲击能力。发现:采用三向支吊架支撑的管道,其缓冲位移约是普通单向支吊架的4倍;管道加速度响应峰值与输入峰值相比衰减72%;管道任意时刻最大应力为146 MPa。而采用普通支吊架支撑的管道加速度响应峰值与最大应力均远大于三向支吊架支撑的管道。可见三向管道支吊架可以显著提高舰艇管道系统的抗冲击能力。

The complicated pipe system is the weakness of the shock resistance ability of the naval ships. In order to raise shock resistance ability of the ship’s pipe system, a kind of tri- dimensional pipe hangers is put forward and the corresponding pipe system is designed. Then, models of the pipe systems supported by convensional unidirectional hangers and present tri-directional hangers are established respectively. Spring elements are used to simulate the pipe hangers. And the same impact loads are applied to the two models. Results of computation are analyzed to compare the resistant ability of the two kinds of pipe hangers. It is found that for the pipe supported by the tri-dimensional hangers, the buffer displacement is nearly 4 times as large as that of the pipe supported by the unidimensional hangers. The peak value of the accelerationresponse is reduced by 72 % in comparison with that of the input excitation. The maximum stress of the pipe is 146 MPa.Both the peak value of the acceleration response and the stress of the pipe supported by tri- directional hangers are much smaller than those of the pipe supported by the unidimensional hangers. So, the tri-dimensional hangers can greatly improve the shock resistance ability of the naval ship’s piping system.