东南大学学报（英文版）2018，Vol.34Issue(1)：36-42,7.DOI:10.3969/j.issn.1003-7985.2018.01.006
基于振动传递的结构连接部非线性识别与表征
Nonlinear identification and characterization of structural joints based on vibration transmissibility
摘要
Abstract
In order to investigate the nonlinear characteristics of structural joint, the experimental setup with a jointed mass system is established for dynamic characterization analysis and vibration prediction, and a corresponding nonlinearity identification method is studied. First, the sine-sweep vibration test with different base excitation levels are applied to the structural joint system to study the dominant modal of mass rigid motion. Then, based on the harmonic balance method principle, the measured vibration transmissibilities are utilized for nonlinearity identification using different excitation levels. Experimental results show that nonlinear spring and damping force can be represented by a polynomial order approximation. The identified nonlinear stiffness and damping force can predict the system's response, and they can reveal the shifts of resonant frequency or damping due to discontinuity of contact mechanisms within a certain range.关键词
结构连接/振动传递/非线性识别/谐波平衡法Key words
structural joint/vibration transmissibility/nonlinear identification/harmonic balance method分类
机械制造引用本文复制引用
刘鑫,孙蓓蓓,李烈,陈建栋,薛飞..基于振动传递的结构连接部非线性识别与表征[J].东南大学学报（英文版）,2018,34(1):36-42,7.基金项目
The Major National Science and Technology Project(No.2012ZX04002032,2013ZX04012032),Graduate Scientific Re-search Innovation Project of Jiangsu Province(No.KYLX_0096). （No.2012ZX04002032,2013ZX04012032）
