全封闭湿式多盘制动器的数值模拟分析

【作者】 邢玉涛；

【导师】 战凯； 刘大维；

【作者基本信息】 青岛大学 ， 车辆工程， 2007， 硕士

【摘要】 全封闭湿式多盘制动器摩擦盘温度场和应力场的计算是设计制动器和选择摩擦副材料的重要理论依据。本文在参阅国内外相关文献的基础上，对全封闭湿式多盘制动器摩擦副接触表面的压力场和摩擦盘的瞬态温度场及应力场进行了研究。介绍了制动器热传导基本方程、制动器结构非线性分析算法及制动器磨擦副接触非线性算法，并对解决全封闭湿式多盘制动器的热传导问题、制动器结构非线性问题及摩擦副接触问题的方法进行了详细的讨论。依据全封闭湿式多盘制动器摩擦盘的实际几何尺寸，建立了二维轴对称有限元分析模型，对模型进行了必要的简化和假设，确定了全封闭湿式多盘制动器有限元分析模型的边界条件，并充分考虑了摩擦盘间温度场和应力场耦合问题。在此基础上采用ANSYS有限元分析软件，对紧急制动工况和持续制动工况的摩擦副接触表面压力、摩擦盘温度场和应力场进行了模拟计算。较真实地模拟了制动器的制动过程，探讨了不同制动工况下摩擦盘偶件温度场和应力场的分布规律。论文还从能量的角度为制动器设计了冷却系统，并对冷却后的制动器摩擦盘进行了温度场和应力场的有限元计算，检验了该冷却系统设计的合理性。更多还原

【Abstract】 Calculating the thermal and stress of the wet multi-disc brake is one of the maincontent in the brake designing and material selecting. Based on extensive references tothe research work and literature in this field, the research of contact condition betweentwo friction discs and the distribution rules of transient thermal field and thermal stressof traction parts were carried out.Starting from the heat conduction differential equation of instant thermal field, thispaper introduces functional thermal transmittance, construction non-linearity and contactnon-linearity of the wet multi-disc brake, explores in detail about how to solve themThe finite element model of the wet multi-disc brake was realistically constructedusing two-dimensional axisymmetric element. By necessary assumption and simplify thispaper confirmed the boundary condition of FEM model. Also the coupling of transientthermal and stress was explored sufficiently. In this paper finite element software ofANSYS was used in the analysis of contact press between two friction discs and thermalfield and stress field of friction disc during emergency braking and lasting process. Basedon the calculation results, the distribution rules of thermal field and thermal stress oftraction parts were studied. The results simulate the braking process objectively.Based on the braking energy theory this paper designs appropriate cooling systemfor the wet multi-disc brake. By FEM analysis of thermal field and stress field to verifythe rationality of the cooling system.更多还原