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针对碟形弹簧减振器特性,对不同组合形式的碟形弹簧减振器的静刚度进行深入分析,确定描述碟形弹簧减振器负荷-位移关系的三次函数表达式,并将一种典型碟形弹簧减振器的理论计算结果与静刚度试验结果进行对比分析,得出当减振器位移较小时,在工程上可以忽略减振器的非线性影响的结论。开展落锤冲击试验,对一种典型碟形弹簧减振系统的动态特性进行研究,获取系统的阻尼系数和等效刚度,通过对碟形弹簧减振系统阻尼特性的分析,可知系统阻尼力由黏性阻尼力和库仑阻尼力两部分组成,因此其阻尼表现出一定的非线性特性。建立单向约束条件下碟形弹簧减振系统的动力学方程,并对该方程的理论计算结果和试验结果进行对比,研究非线性阻尼特性对碟形弹簧减振系统动态特性的影响及工程处理方法。
According to the characteristics of the disc spring damper, the static stiffness of the disc spring damper in different combinations is analyzed deeply to determine the cubic function expression describing the load-displacement relationship of the disc spring damper. A typical Comparing the theoretical calculation results of the disc spring absorber and the static stiffness test results, it is concluded that the nonlinear effect of the damper can be neglected in engineering when the displacement of the damper is small. The drop-hammer impact test is carried out to study the dynamic characteristics of a typical disc spring damping system and to obtain the damping coefficient and equivalent stiffness of the system. By analyzing the damping characteristics of the disc spring damping system, the damping force of the system Viscous damping force and Coulomb damping force composed of two parts, so the damping showed some nonlinear characteristics. The dynamic equation of the disc spring vibration-damping system under unidirectional constraint is established. The theoretical calculation results and experimental results of the equation are compared. The influence of nonlinear damping on the dynamic characteristics of the disc spring vibration-damping system and the engineering treatment method.