消声器是船舶柴油机排气噪声控制的必要装置,其结构特点使得结构整体刚度偏低,在冲击环境下将产生较大的应力与形变,进而导致结构产生塑性变形或破损,这将对柴油机排气噪声抑制产生较大的影响.本文基于动态设计分析方法,以典型柴油机排气消声器为研究对象,进行冲击响应分析,并结合其应力与位移分布特点,从质量刚度分布优化与结构形式优化两方面出发,对其进行抗冲击优化研究,提出了一些抗冲击优化设计的方法.%The silencer is the necessary device for ship diesel exhaust noise control. Because of the low structural stiff-ness, the large displacement and stress will be happened in the shock environment. And then, the plastic deformation or dam-age will be generated, which will have a great influence on the exhaust noise control of diesel engines. In this paper, the com-mon diesel silencer is selected as calculation model, and the shock response of structure is analyzed by dynamic design ana-lysis method. According to the distribution of stain and displacement results, the shock resistance method of silencer struc-ture is studied based on the optimization of mass distribution, stiffness distribution and structure form. Some methods of si-lencer shock resistance design are presented.
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