连接结构宏观滑移能量耗散特性研究

doi:10.3901/JME.2018.15.125

机械工程学报 ›› 2018, Vol. 54 ›› Issue (15): 125-131.doi: 10.3901/JME.2018.15.125

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连接结构宏观滑移能量耗散特性研究

李一堃^1,2, 郝志明²

1. 成都大学高等研究院成都 610106;
2. 中国工程物理研究院总体工程研究所绵阳 621900

收稿日期:2017-08-11 修回日期:2018-03-11 出版日期:2018-08-05 发布日期:2018-08-05
通讯作者: 郝志明(通信作者),男,1965年出生,博士,研究员,博士研究生导师。主要研究方向为计算固体力学。E-mail:haozm@caep.cn
作者简介:李一堃,男,1989年出生,博士。主要研究方向为计算固体力学。E-mail:yikun.li@foxmail.com
基金资助:
中国工程物理研究院计算固体力学学科资助项目。

Investigation on the Energy Dissipation Properties of Jointed Structure during Macro-slip Stage

LI Yikun^1,2, HAO Zhiming²

1. Advanced Research Institute, Chengdu University, Chengdu 610106;
2. Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900

Received:2017-08-11 Revised:2018-03-11 Online:2018-08-05 Published:2018-08-05

摘要/Abstract

摘要： Iwan模型常用于描述连接结构的能量耗散与阻尼特性。基于六参数Iwan模型，推导得到宏观滑移阶段能量耗散-加载力幅值的解析表达式。提出基于螺栓连接结构宏观滑移试验的参数辨识方法，对六参数Iwan模型进行辨识。将连续的六参数Iwan模型离散为有限个Jenkins单元并开展有限元数值计算。结果表明，六参数Iwan模型解析解与螺栓连接结构试验结果符合较好；由于宏观滑移阶段接触界面存在残余刚度，螺栓连接结构在宏观滑移阶段的能量耗散-加载力幅值关系为线性关系；在宏观滑移阶段，有限元数值计算结果与解析解符合较好。六参数Iwan模型能够准确描述宏观滑移阶段螺栓连接结构能量耗散特性。

关键词: Iwan模型, 宏观滑移, 接触摩擦, 连接结构, 能量耗散

Abstract: Iwan Model is often deployed to describe energy dissipations and damping properties of jointed structures. The analytical expression of energy dissipation vs. applied force during macro-slip stage is derived based on the six-parameter Iwan model. Parameter identification method according to the macro-slip experiment of bolted joints is also provided in order to deduce the parameters of the model. A finite amount of Jenkins elements is obtained and further applied in numerical simulations. The results indicate a good agreement between the analytical results of the six-parameter Iwan model and the experimental data. A linear relationship of energy dissipation vs. applied force is obtained due to the residual stiffness acting on the contact interfaces during the macro-slip stage. The calculated results show a good conformity with the analytical ones during the macro-slip stage. It is shown that the six-parameter Iwan model can be used to well describe the energy dissipation properties of bolted joints during the macro-slip stage.

Key words: contact friction, energy dissipation, Iwan model, jointed structure, macro-slip

中图分类号:

TH117

李一堃, 郝志明. 连接结构宏观滑移能量耗散特性研究[J]. 机械工程学报, 2018, 54(15): 125-131.

LI Yikun, HAO Zhiming. Investigation on the Energy Dissipation Properties of Jointed Structure during Macro-slip Stage[J]. Journal of Mechanical Engineering, 2018, 54(15): 125-131.

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连接结构宏观滑移能量耗散特性研究

Investigation on the Energy Dissipation Properties of Jointed Structure during Macro-slip Stage

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