摩擦尖叫噪声有限元预测分析的可靠性研究  

Study on the Reliability of Two Finite Element Modeling Approaches to Frictional Squeal

作　　者：陈光雄[1] 戴焕云[1] 曾京[1] 周仲荣[1] 

机构地区：[1]西南交通大学摩擦学研究所牵引动力实验室,四川成都610031

出　　处：《润滑与密封》2009年第3期1-5,11,共6页Lubrication Engineering

基　　金：教育部新世纪优秀人才资助项目(NCET-06-0798);西南交通大学创新研究群体基金资助项目(2007IRT01)

摘　　要：使用相同的制动系统,分别建立了基于ABAQUS和NASTRAN的制动摩擦尖叫噪声有限元预测分析模型。基于ABAQUS的摩擦尖叫噪声模型利用接触耦合关系计算法向力,不需要在接触界面假设接触弹簧。基于NASTRAN的摩擦尖叫噪声模型根据罚函数法计算法向力,需要在接触界面假设接触弹簧。比较了这2种模型的计算结果,发现即使这2个模型采用相同的有限元网格,计算预测到的不稳定频率(即实部为正的复特征值虚部)通常不同,且NASTRAN建模方法只能部分预测到中高频尖叫噪声。计算结果显示,当接触弹簧刚度大于等于3.2×109N/m时,NASTRAN模型的预测结果基本相同;有限元网格尺寸和单元类型对计算结果也有较大的影响。Two complex eigenvalue analysis models for the same brake friction system were established using ABAQUS and NASTRAN tools,respectively. In the ABAQUS modeling approach, friction coupling was applied to determine contact normal force and no contact spring was assumed between the disc and pads. But in the NASTRAN modeling approach, contact springs were assumed by the penalty method to simulate contact connection between the disc and pads. The comparison between the results from two models shows that these two modeling approaches are not capable of predicting approximate identical instability frequency even though the same mesh geometry is used. The results demonstrate that the NASTRAN modeling approach only predicts a part of high frequency instabilities, not all. The results display that when the assumed contact spring stiffness kc ≥3.2 × 10^9 N/m the prediction result of the NASTRAN modeling approach is approximately identical ; the mesh sizes and element types have clear influence on the prediction results of these two finite element modeling approaches.

关 键 词：摩擦 制动 噪声 尖叫 有限元 

分 类 号：TH117.1[机械工程—机械设计及理论]