船舶在全生命周期内面临非接触爆炸、碰撞及波浪等多源瞬态强载荷冲击，消声器作为发动机排气系统核心部件，其抗冲击性能直接影响船舶动力系统稳定性。本文以某型船用6缸柴油机配套消声器为研究对象，围绕其抗冲击性能开展系统仿真研究，在Ansys中完成网格划分、材料参数赋值及边界条件设置，建立高精度有限元模型，分析发动机消声器前10阶固有频率与振型，通过Ansys/Ls-dyna求解器开展纵、横、垂向冲击工况仿真，研究明确了消声器各关键部件的失效风险点及核心控制工况，为其抗冲击结构优化提供理论支撑与数据依据。
Ships are subjected to multiple sources of transient, high-intensity impact loads such as non-contact explosion, collision, and wave impact during their entire life cycle. As a core component of the engine exhaust system, the muffler's anti-shock performance directly affects the stability of the ship's power system. Taking a muffler matched with a certain type of marine 6-cylinder diesel engine as the research object, this study conducted systematic simulation research on its anti-shock performance. Mesh generation, material parameter assignment, and boundary condition setting were completed in Ansys to establish a high-precision finite element model. The first 10 orders of natural frequencies and mode shapes of the marine engine muffler were analyzed, and simulations of longitudinal, transverse, and vertical impact working conditions were carried out using the Ansys/LS-DYNA solver. The research identified the failure risk points of various key components of the muffler and the core control working conditions, providing theoretical support and data basis for the optimization of its anti-shock structure.
2025,47(24): 181-184 收稿日期：2025-6-14
DOI：10.3404/j.issn.1672-7649.2025.24.029
分类号：U664.121
基金项目：云南省科技厅基础研究计划资助项目（202101BA070001-002）；云南省智能物流装备与系统重点实验室资助项目（202449CE340008）；云南省沈卫明院士工作站资助项目（202505AF350084）
作者简介：李云霞(1977-),女,硕士,讲师,研究方向为机械设计及智能制造技术应用
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