振动环境下过盈装配圆柱结构预紧防转判据研究

摘要

In studying interference preload anti-rotation validity criterion for cylinder assemblies under vibration environment,using Mooney-Rivilin model to describe the mechanical behavior of rubber cushion and adopting Coulomb contact sliding assumptions, the stress field was calculated with ABAQUS. The displacement boundary between compression-shear deformation state and friction-sliding state was obtained,and optional contact points were on this boundary.When an offset displacement exceeded this boundary,the corresponding stress entered a frictional sliding state. This made the minimum slip eccentric distance be defined as the validity criterion of preload.This criterion means that if the relative motion amplitude under vibration environment is smaller than the minimum slip eccentric distance,no relative rotation appears between layers,the preload anti-rotation assembly is effective.Through numerical simulation and a shaking table test for relation motions with orthogonal axes and phase-difference,it was shown that the inter-layer rotation only occurs when the relative motion amplitude exceeds a certain value,so the resonableness of the minimum slip eccentric distance is verified.%在振动环境下过盈装配圆柱结构预紧防转判据研究中，以Mooney－Rivilin本构模型描述缓冲橡胶垫层，以库伦滑动假设描述界面接触滑动，在ABAQUS中计算获得了任选接触点处于压剪变形状态与摩擦滑动状态分界的位移边界，并由此定义了最小滑移偏心距作为预紧有效性的判据，即振动环境下相对运动幅值小于此偏心距，内外层之间将不会产生相对转动，预紧防转装配有效。数值仿真试验和基于单轴振动台的正交相差相对运动试验表明，只有当相对运动幅值超过一定量值时，才出现层间转动现象，验证了最小滑移偏心距判据的合理性。