中文摘要：

本文中基于对敷设约束阻尼的薄板-声腔耦合系统拓扑优化的研究,对某一微型客车进行车内声学优化。首先建立薄板-声腔耦合系统有限元模型,采用基于SIMP的拓扑优化算法对敷设约束阻尼的耦合系统进行优化和试验验证,结果表明,仿真结果与试验数据比较接近,证明所采用的方法在噪声控制方面的可行性。通过合理地布置约束阻尼材料可有效控制耦合系统声压,减少约束阻尼材料的用量。最后,基于薄板-声腔耦合系统的研究,将约束阻尼的拓扑优化应用到微型客车上,降低了驾驶员右耳处的A计权声压级,提高了微型客车的NVH性能。

英文摘要：

Based on a study on the topology optimization of a plate-acoustic cavity coupling system with constrained damping layer applied,the interior acoustic optimization is performed on a minibus in this paper. Firstly a finite element model for the plate-acoustic cavity coupling system is developed,which with constrained damping layer applied is optimized by using topology optimization algorithm SIMP,with test verification performed. The results show that the outcomes of simulation are relatively close to test data,demonstrating the feasibility of the method adopted in respect of noise control. Proper layout of constrained damping material can effectively control the sound pressure of coupling system,and reduce the constrained damping material used. Based on the study on plate-acoustic cavity coupling system,the topology optimization of constrained damping is applied to a minibus,resulting in a reduction of A-weighted sound pressure level at the right ear of driver and an enhancement of the NVH performance of minibus.