特种车悬架减振器变厚度阀片应力解析计算方法及应用研究  

Stress analytic computation of variable-thickness slice of shock absorber for special vehicle suspension and its application

作　　者：赵雷雷[1,2] 周长城[1] 于曰伟 

机构地区：[1]山东理工大学交通与车辆工程学院,淄博255049 [2]北京邮电大学自动化学院,北京100876

出　　处：《中国科学：技术科学》2017年第5期455-462,共8页Scientia Sinica(Technologica)

基　　金：国家自然科学基金(批准号:51575325);山东省自然科学基金(批准号:ZR2013EEM007);山东省重点研发计划(批准号:2015GGX105006)资助项目

摘　　要：为了同时满足特种车辆悬架减振器阀片应力强度设计及阻尼特性精确设计的需求,须采用变厚度节流阀片,然而目前尚无精确的变厚度节流阀片应力解析计算公式,常出现阀片的断裂失效问题.根据变厚度节流阀片的力学模型,给出了阀片在均布压力作用下的变形曲面微分方程的通解.根据变厚度节流阀片变形、内力和应力之间的关系,创建了变厚度节流阀片径向、周向和复合应力解析计算式及阀片应力系数.利用ANSYS有限元软件对应力解析计算式正确性进行了仿真验证,结果表明解析计算值与仿真值吻合且相对偏差在0.8%以内.通过实例,利用应力解析计算式设计了变厚度阀片并进行了试验验证.试验结果表明,所设计的变厚度阀片同时满足了阀片应力强度与阻尼特性精确设计的要求,所建立的变厚度节流阀片应力解析计算方法是正确、可靠的,为减振器变厚度节流阀片设计和快速进行强度分析提供了有益参考.To meet the requirements of throttle slice stress intensity and damping characteristics for special vehicle, the shock absorber needs to adopt variable-thickness throttle slice, but there is no accurate stress analytic computation formula for it, thus, the fracture failure of the valve often occurrs. Based on the mechanics model of variable-thickness throttle slice, the general solutions of the differential equation of throttle slice on uniform pressure was given, and the deformation analytic formula was established. With the relations of the deformation, the inner force, and the stress of the throttle slice, the analytic formulae of radial, circumferential and compound stress at any radius were given, and the slice stress coefficients were built. The stress of variable-thickness throttle slice on uniform pressure at any radius was computed, and was testified by ANSYS, the value computed was close to that simulated, and the maximum of the relative deviation was less than 0.8%. With a practical example, by test, the stress analytic computation formula was validated. The test results showed the valve designed met the requirements of stress intensity and stiffness and the stress computation method was reliable, which has important reference value for variable-thickness throttle slice design and intensity analysis.

关 键 词：特种车 悬架 减振器 变厚度节流阀片 复合应力 

分 类 号：U463.33[机械工程—车辆工程]