非金属预弯开口减振结构响应特性及逆向设计

doi:10.12382/bgxb.2021.0555

摘要/Abstract

摘要： 针对非金属减振结构动态响应特性易出现负刚度的现象，研究一种基于非金属材料的预弯开口减振结构。采用有限元法对该结构进行响应特性分析，明确各结构参数对减振结构响应状态的作用机理，并建立该减振结构响应特征曲线与各结构参数的关联关系，用实例验证此关联关系的准确性。结果表明：预弯开口减振结构的结构参数对其响应特性有较大影响，主截面尺寸变化主要影响特性曲线的接触变形期；预弯角大小主要影响特性曲线的平台期和接触变形期；开口尺寸大小影响特性曲线的平台期和接触变形期。具体体现在：预弯柱高度、开口高度和最短距离影响特征曲线中A点的上下变化，特征B点的上下左右变化；预弯柱宽影响特征曲线中A点的上下左右变化，特征B点的上下变化；预弯角影响特征曲线中A点和B点的上下左右变化；开口倒角影响特征B点的上下左右变化。所得成果可为该类型减振装置的优化设计提供新的参考。

关键词: 橡胶减振, 预弯开口, 有限单元法, 响应机理, 反向设计

Abstract: Considering that the dynamic response of non-metallic vibration damping structures is prone to negative stiffness, a pre-bending opening vibration damping structure is studied. The response characteristics of the structure are analyzed by finite element method, and the acting mechanism of each structural parameter for the response state of the vibration damping structure is clarified. The correlation between the vibration-absorbing structure response characteristic curve and the structural parameters is established, and the accuracy of the correlation is verified. The results show that the structural parameters of the pre-bending opening damping structure have a great influence on its response characteristics, and the contact deformation period of the characteristic curve is mainly affected by the change of the main section size. The plateau period and contact deformation period of the characteristic curve is mainly affected by the pre-bending angle. Specifically, the up and down changes of point A in the characteristic curve, and the up and down, left and right changes of point B are affected by the height of the pre-bent strut, the height of the opening, and the shortest distance. The up and down, left and right changes of point A in the characteristic curve, and the up and down changes of point B are affected by the width of the pre-bent strut. The up and down, left and right changes of point B in the characteristic curve are affected by the pre-bending angle. This study can provide a reference for the optimal design of vibration damping devices.

Key words: rubberdamping, pre-bendingopening, finiteelementmethod, responsemechanism, reversedesign

中图分类号:

O328

何泽鹏，傅德彬，毕凤阳，卢丙举. 非金属预弯开口减振结构响应特性及逆向设计[J]. 兵工学报, 2022, 43(11): 2924-2934.

HE Zepeng, FU Debin, BI Fengyang, LU Bingju. Response Characteristics and Reverse Design of Vibration Damping Structure for Non-metallic Pre-bending Opening[J]. Acta Armamentarii, 2022, 43(11): 2924-2934.

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