剪切模型箱在离心振动复合环境下的动力学响应分析

摘要

目的：研究剪切模型箱在复合环境下的动力学响应规律。方法针对叠层式剪切模型箱的结构特点，建立考虑层间滑动的动力学模型。通过对离心机在工作状态下的动力学特性进行模拟，结合设计指标，对剪切模型箱进行离心振动复合环境下的响应分析。结果得到了剪切模型箱的激励力谱，以及模型箱在不同过载及振动环境状态下的固有特性。结论离心工作环境下，模型箱固有频率变低。离心载荷是影响模型箱强度设计的主要因素。%ABSTRACT:Objective To investigate the dynamic response of shear model box in Compound Dynamical Environment. Methods Based on the structure characteristics of multidirectional laminar shear model box, the dynamic model was established considering the slippage of different layers. According to the dynamic simulation on the working status of whole centrifuge model, the spectrum of excited force was obtained. Then the dynamic response of shear model box was investigated combined with the effect of centrifugal and vibration compound. Results The excited force spectrum of shear model box was obtained, as well as the natural characteristics of shear model box in different overload and vibration environments. Conclusion The natural frequencies of shear model box decreased as a result of centrifugal effect, and the centrifugal load was the major influencing factor for the strength design of shear model box.