MODELING METHOD OF DYNAMIC CHARACTERISTICS OF BOLTED CONNECTION BASED ON CONTACT BOUNDARY AND FRACTAL THEORY

LU ShiKun; HUA DengXin; LI Yan; LI PengYang; CUI FangYuan

doi:10.16579/j.issn.1001.9669.2021.03.022

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MODELING METHOD OF DYNAMIC CHARACTERISTICS OF BOLTED CONNECTION BASED ON CONTACT BOUNDARY AND FRACTAL THEORY

更新时间：2022-09-22

- MODELING METHOD OF DYNAMIC CHARACTERISTICS OF BOLTED CONNECTION BASED ON CONTACT BOUNDARY AND FRACTAL THEORY
- Journal of Mechanical Strength Vol. 43, Issue 3, Pages: 660-668(2021)
- 作者机构：
  
  1. 西安理工大学机械与精密仪器工程学院
  2. 莱芜职业技术学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2021.03.022
  CLC：
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LU ShiKun, HUA DengXin, LI Yan, et al. MODELING METHOD OF DYNAMIC CHARACTERISTICS OF BOLTED CONNECTION BASED ON CONTACT BOUNDARY AND FRACTAL THEORY. [J]. 43(3):660-668(2021)
DOI：

LU ShiKun, HUA DengXin, LI Yan, et al. MODELING METHOD OF DYNAMIC CHARACTERISTICS OF BOLTED CONNECTION BASED ON CONTACT BOUNDARY AND FRACTAL THEORY. [J]. 43(3):660-668(2021) DOI： 10.16579/j.issn.1001.9669.2021.03.022.

摘要

针对考虑粗糙度影响的螺栓连接结构动态特性建模问题,建立了由弹簧-阻尼模型代替粗糙表面结合面的螺栓连接新模型,该模型综合考虑了螺栓、垫片、粗糙结合面等多种因素对振动特性的影响,纠正了以往模型不考虑表面粗糙度对振动频率的影响的弊端,更符合真实情况。该模型基于机械表面几何分形理论,得到结合面刚度特性计算公式。基于有限元接触分析结果确定弹簧-阻尼模型弹簧的布局域,同时研究了弹簧布局数量对振动特性的影响。实验结果显示,方法结果与实验结果非常接近,说明方法有效。

Abstract

Aiming at the problem of dynamic characteristic modeling of bolted connection structure considering the influence of roughness,a new model of bolted connection with rough surface joint surface replaced by spring damping model is established,which considers the influence of various factors such as bolt,gasket and rough joint surface on vibration characteristics. The model is based on the fractal theory of mechanical surface,and the calculation formula of the joint stiffness is obtained. Based on the finite element contact results,the spring layout of the spring damping model is determined,and the influence of the number of spring layouts on the vibration characteristics is studied. The experimental results show that the results of this method are very close to the experimental results,which show that this method is effective.

关键词

螺栓连接粗糙表面振动特性固有频率

Keywords

Bolted connectionRough surfaceVibration characteristicsNatural frequency

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