封闭空间有源结构声控制中次级力的约束优化

Constraint optimization of secondary forces in active structural acoustic control in enclosures

为了解决封闭空间有源结构声控制中次级力源在约束条件下的布置问题,建立了封闭空间有源结构声控制约束优化模型,提出了一种约束条件下确定次级力源最优配置参数的方法。以封闭矩形腔为例进行仿真计算,讨论了控制力的数量对控制效果的影响,并在有限元仿真软件COMSOL中对优化结果进行了验证。结果表明:在约束条件下,采用该方法计算得到的次级力源位置和复强度的控制能获得更好的声势能控制效果,两个控制力比单个控制力能取得更大的声势能和结构动能的衰减。

The arrangement problem of secondary forces in active structural acoustic control(ASAC)of enclosure under the constraint conditions was addressed.The constraint optimization ASAC model of enclosure was established.A method for determining the optimal parameters of secondary forces under the constraint conditions was proposed.Taking the rectangular enclosure for simulation calculation,the control effect of the control forces number was discussed,and the optimization results were verified in COMSOL.The results show that under the constraint conditions,a better control effect of acoustic potential energy(APE)can be obtained with the position and complex strength optimized calculated by the method,and that a greater momentum of acoustic potential energy and structural kine-tic energy(SKE)can be gained in two control forces compared with a single control force.