消声器设计的主要目标为降低气流的沿程压力损失和提高噪声主要频带内的传递损失。本文分别采用多学科尺寸优化方法及拓扑优化对消声器性能优化进行理论研究,并结合实际车辆进行了消声器实车实验及阻抗管传递损失测量。 针对多腔穿孔管抗性消声器优化问题,文中综合考虑消声器的声学及流场性能,通过数值分析进行多学科优化分析与设计。在声场与流场分析中,分别采用基于Helmholtz方程和Navier-Stokes方程的有限元离散方法,建立了声学和流场两个学科的加权目标函数,并对比分析了基于灵敏度的NelderMead算法及基于随机抽样的MonteCarlo算法的多学科优化结果。另外,通过结合Matlab遗传算法工...The main objective of the muffler design is to reduce the pressure drop of airflow and to increase the transmission loss (TL) in the main frequency band of the noise. In this paper, the multidisciplinary size optimization method and topology optimization are used to optimize the performance of the muffler. The actual vehicle noise performance is tested with the muffler and the transmission loss me...学位:工程硕士院系专业:航空航天学院_工程硕士(机械工程)学号:1992014115292