水下单层圆柱壳振动声辐射预报的测点布置改进方法

为解决水下单层圆柱壳结构振动声辐射预报中的测点布置问题,本文提出一种测点布置改进方法——均匀子集随机选取测点方法。该方法将所有待选测点分成相互独立的均匀子集,然后从各个子集中随机选取一个测点,再通过目标函数对每组测点进行评价,从而选择出好的测点组合。通过与均匀布置方法得到的振动声辐射预报结果对比表明,本文提出的均匀子集随机选取测点方法不仅保证较高的振动声辐射预报精度,且避免均匀布置方法中测点选择的主观性和盲目性,是一种优秀的测点布置方法。

Research on improved method of sensor placement for vibration and acoustic radiation prediction of underwater single-layer cylinder shell

In order to solve the problem of sensor placement for vibration and acoustic radiation prediction of underwater single-layer cylinder shell,an optimal sensor placement method was proposed base on stochastic and uniform hybrid algorithm in this article.This method divides all candidate nodes into uniform sub-intervals according to the number of measuring points,then selects a point randomly from each sub-interval as the measuring point.In addition,an objective function is introduced to evaluate the pros and cons of each combination of measuring points,so the optimized measuring point placement can be got Comparing this method with uniform sensor placement from the result of vibration and acoustic radiation prediction,the method based on stochastic and uniform hybrid algorithm can not only predict the vibration and sound accurately,but also avoid the subjectivity and blindness of measuring point selection.