基于六参数非均匀密度函数的伊万模型研究

李一堃; 郝志明; 章定国

doi:10.6052/0459-1879-14-375

基于六参数非均匀密度函数的伊万模型研究

1 南京理工大学理学院, 南京210094
2 中国工程物理研究院总体工程研究所, 四川绵阳621900

基金项目: 中国工程物理研究院总体工程研究所创新与发展基金项目(14cxj15)和中国工程物理研究院重点学科项目(计算固体力学)资助.

详细信息

通讯作者:
郝志明,研究员,主要研究方向:计算固体力学.E-mail:haozm@caep.cn

中图分类号: O322
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出版历程
- 收稿日期: 2014-11-25
- 修回日期: 2015-03-02
- 刊出日期: 2015-05-17

INVESTIGATION INTO IWAN MODEL BASED ON THE SIX-PARAMETER NON-UNIFORM DENSITY FUNCTION

1 School of Sciences, Nanjing University of Science and Technology, Nanjing 210094, China
2 Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

Funds: The project was supported by the Innovation and Developing Foundation of ISE, CAEP (14cxj15) and the Key Discipline Project (Computational Solid Mechanics) of CAEP.

摘要

摘要: 伊万模型(Iwan model) 常用于描述连接的能量耗散和阻尼特性,来研究连接结构的非线性静动力学行为.本文提出了一个含截断幂律分布和双脉冲的非均匀密度函数的六参数伊万模型, 推导出六参数伊万模型的骨线方程,微、宏观滑移情况下的卸载方程和能量耗散的解析表达式,并讨论了模型参数对能量耗散的影响. 与已有的伊万模型相比,六参数伊万模型能够更好地描述连接结构的实验现象.
- 连接结构 /
- 伊万模型 /
- 能量耗散 /
- 密度函数 /
- 滑移
Abstract: Iwan model, which is commonly applied to describe the properties of energy dissipation and damping occurred in joints, becomes a meaningful tool for understanding both static and dynamic nonlinearity mechanisms of jointed structures. This paper presents a six-parameter Iwan model based on the non-uniform density function which contains an abridged power-law distribution and two impulsive functions. The analytic expressions of the six-parameter Iwan model including the backbone curve, unloading curves and energy dissipations during both micro-slipping and macro-slipping are deduced. Discussions on the effects of model parameters to energy dissipation are also performed. Compared to those existing Iwan models, the presented one is able to give a better description on the experimental phenomena of jointed structures.
- jointed structures /
- Iwan model /
- energy dissipation /
- density function /
- slipping

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参考文献(27)

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