Effects of material properties on generation of brake squeal noise using finite element method

AbstractThis research paper is concerned with the disc brake squeal problem for passenger cars. The aim of the present research is developing a finite element model of the disc brake assembly in order to improve understanding of the influence of Young's modulus on squeal generation. A detailed finite element model of the whole disc brake assembly that integrates the wheel hub and steering knuckle is eveloped and validated using experimental modal analysis. Stability analysis of the disc brake assembly is accomplished to find unstable frequencies. A parametric study is carried to look into the effect of changing Young's modulus of each brake components on squeal generation. The results of simulation indicated that Young's modulus of disc brake components play a substantial role in generating the squeal noise.

摘要 本研究聚焦于乘用车盘式制动尖叫问题。本研究的目标为构建盘式制动器总成的有限元模型，以加深对杨氏模量（Young's modulus）对制动尖叫产生影响的理解。本研究构建了集成轮毂与转向节的完整盘式制动器总成精细化有限元模型，并通过试验模态分析对该模型进行了验证。对盘式制动器总成开展稳定性分析以识别其不稳定频率。本研究开展参数化研究，探究各制动组件的杨氏模量变化对制动尖叫产生的影响。仿真结果表明，盘式制动器组件的杨氏模量在制动尖叫噪声的产生过程中发挥着至关重要的作用。