基于梯度虚拟材料的栓接结合部连接参数表征

doi:10.3901/JME.2018.11.102

机械工程学报 ›› 2018, Vol. 54 ›› Issue (11): 102-109.doi: 10.3901/JME.2018.11.102

基于梯度虚拟材料的栓接结合部连接参数表征

孙清超¹, 黄庆涛¹, 孙志勇^1,2, 齐艳华¹, 孙伟¹

1. 大连理工大学机械工程学院大连 116024;
2. 苏州汇川技术有限公司苏州 215100

收稿日期:2017-09-09 修回日期:2018-02-18 出版日期:2018-06-05 发布日期:2018-06-05
作者简介:孙清超,男,1979年出生,副教授,硕士研究生导师。主要研究方向为高端紧固/装配、超高周疲劳损伤。E-mail:qingchao@dlut.edu.cn;黄庆涛,男,1994年出生,硕士研究生。主要研究方向为从动力学角度分析装配问题。E-mail:huangqingtao1@sina.com
基金资助:
国家自然科学基金（51475077，U1608256）和大连理工大学基本科研业务费（DUT17GF205）资助项目。

Interface Parameter Identification of Bolted Connections Based on Gradient Virtual Material

SUN Qingchao¹, HUANG Qingtao¹, SUN Zhiyong^1,2, QI Yanhua¹, SUN Wei¹

1. Mechanical Engineering, Dalian University of Technology, Dalian 116024;
2. Inovance, Suzhou 215100

Received:2017-09-09 Revised:2018-02-18 Online:2018-06-05 Published:2018-06-05

摘要/Abstract

摘要： 螺栓连接是应用最广泛的装配形式之一，表征栓接结合部连接参数是进行装配体结构动力学分析的关键，针对各向同性虚拟材料模型不能准确表征结合面压力分布不均匀性的问题，提出并开发一种基于梯度虚拟材料的栓接结合面连接参数表征模型。首先根据结合面压力分布特征，以及结合面法向、切向刚度与压力分布间的映射关系，建立了等效虚拟材料参数随位置坐标的变化规律模型；分别采用等参梯度单元和高斯积分点料属性梯度分布单元等效表征结合部连接参数，采用结构静力学、动力学分析方法进行分析，通过对比不同类型单元静力学、动力学计算结果，验证梯度材料单元的准确性；进而研究了基于代理模型的梯度虚拟材料参数辨识方法，采用拉丁超立方采样来获取样本点，采用Kriging模型拟合连接参数，应用遗传算法优化虚拟材料参数。采用均匀虚拟材料模型、各向异性虚拟材料模型及梯度虚拟材料模型的仿真结果与试验数据对比，表明梯度虚拟材料模型是一种表征栓接结合部压力/刚度分布特性的有效方法。

关键词: 参数辨识, 代理模型, 栓接结合部, 梯度虚拟材料, 压力不均匀

Abstract: Bolt connection is one of the most widely used forms of assembly, and the key of the dynamic analysis of the assembly structure is to characterize the connection parameters of the bolted joint. Because the virtual isotropic material model can't accurately characteristic the problems of asymmetrical surface pressure distribution, this paper put forward the parametric representation model of bolted joint surface, which based on Gradient virtual material. First, according to the characteristics of the pressure distribution of the joint surface and the mapping relationship between the normal and tangential stiffness with the pressure distribution, the change rule model of equivalent virtual material parameters with position coordinates is established. Using different gradient unit, including isoparametric graded finite elements and Gaussian unit which the material of integral point is gradient distribution characterize the junction parameters and the structural static and dynamic analysis method are used to analyze the accuracy of the gradient material unit by comparing the static and dynamic calculation results of different types of units. Furthermore, the parametric identification method of gradient virtual material based on agent model is studied, and the Latin hypercube sampling is used to get sample points, by using the Kriging model fitting connection parameters, using genetic algorithm to optimize the virtual material parameters. Comparing the simulation results of uniform virtual material, anisotropic virtual material, and gradient virtual material with the experimental results, shows that the gradient virtual material model is an effective method to characterize the pressure/stiffness distribution characteristics of bolted joint.

Key words: bolted joint, parameter identification, surrogate models, uneven pressure, virtual graded material

中图分类号:

TH131

孙清超, 黄庆涛, 孙志勇, 齐艳华, 孙伟. 基于梯度虚拟材料的栓接结合部连接参数表征[J]. 机械工程学报, 2018, 54(11): 102-109.

SUN Qingchao, HUANG Qingtao, SUN Zhiyong, QI Yanhua, SUN Wei. Interface Parameter Identification of Bolted Connections Based on Gradient Virtual Material[J]. Journal of Mechanical Engineering, 2018, 54(11): 102-109.

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基于梯度虚拟材料的栓接结合部连接参数表征

Interface Parameter Identification of Bolted Connections Based on Gradient Virtual Material

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