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掌握波纹管的振动特性并使其固有振动频率合理分布是发动机动力学研究的重要内容之一。在分析发动机进气管振动对发动机影响的基础上,建立了某发动机进气管的有限元分析模型。通过仿真计算得到了热振动模态参数,验证了进气管设计的合理性。结果表明,结构温度发生显著变化并引起热应力,进一步影响到结构的固有振动特性,为发动机进气管的动力响应分析和进一步的结构优化设计提供理论参考依据。
To grasp the vibration characteristics of the corrugated pipe and to make the natural frequency of the corrugated pipe reasonable distribution is one of the important contents of engine dynamics research. Based on the analysis of the influence of engine intake pipe vibration on the engine, a finite element analysis model of an engine intake pipe was established. The thermal vibration modal parameters were obtained by simulation and the rationality of inlet pipe design was verified. The results show that the structural temperature changes significantly and causes thermal stress, which further affects the inherent vibration characteristics of the structure, providing theoretical reference for the dynamic response analysis of the intake manifold of the engine and further structural optimization design.