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 stiffness, the large displacement and stress will be happened in the shock environment. And then, the plastic deformation or damage will be generated, which will have a great influence on the exhaust noise control of diesel engines. In this paper, the common diesel silencer is selected as calculation model, and the shock response of structure is analyzed by dynamic design analysis method. According to the distribution of stain and displacement results, the shock resistance method of silencer structure is studied based on the optimization of mass distribution, stiffness distribution and structure form. Some methods of silencer shock resistance design are presented.
2018,40(6): 67-72 收稿日期：2017-10-17
DOI：10.3404/j.issn.1672-7649.2018.06.014
分类号：TK422;U664.1
作者简介：曹贻鹏(1980-),男,博士,副教授,研究方向为振动噪声控制
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