Quasi-static Modal Analysis based on Implicit Condensation for Structures with Nonlinear Joints

被引:0
作者
Allen, M. S. [1 ]
Lacayo, R. M. [1 ]
Brake, M. R. [2 ]
机构
[1] Univ Wisconsin, Dept Engn Phys, 1500 Engn Dr,Eng Res Bldg, Madison, WI 53706 USA
[2] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA
来源
PROCEEDINGS OF ISMA2016 INTERNATIONAL CONFERENCE ON NOISE AND VIBRATION ENGINEERING AND USD2016 INTERNATIONAL CONFERENCE ON UNCERTAINTY IN STRUCTURAL DYNAMICS | 2016年
基金
美国能源部;
关键词
SYSTEMS; MODEL; BEAM;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Significant insight can be gained into the dynamics of a structure with bolted interfaces by observing the change in the effective modal natural frequency and damping of each mode of the structure as excitation amplitude increases. Unfortunately, current methods for estimating these parameters require that the model be integrated through several dynamic transient simulations at considerable computational expense. Festjens, Chevallier and Dion [Int. J. Mech. Sci. 75:170-177, 2013] recently proposed an alternative based on quasi-static analysis. This work builds on theirs, presenting an alternate derivation and alternative means of extracting the frequency and damping. The utility of the approach is then explored by using it to estimate the modal frequency and damping of two structures where bolted interfaces are modeled using discrete Iwan joints. The cases studied show that the methodology is highly effective in the micro-slip regime and provides several orders of magnitude reduction in the computational cost.
引用
收藏
页码:731 / 745
页数:15
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