Numerical Simulation of Impact Responses for an Elastic Structure with a Viscoelastic Spring Including Nonlinear Hysteresis Damping

被引:0
|
作者
Yamaguchi, Takao [1 ]
Fujii, Yusaku [2 ]
Kanai, Tomoyuki [3 ]
Nagai, Ken Ichi [1 ]
Maruyama, Shinichi [1 ]
机构
[1] Gunma Univ, Dept Mech Syst Engn, 1-5-1 Tenjin Cho, Kiryu, Gunma 3768515, Japan
[2] Gunma Univ, Dept Elect Engn, Kiryu, Gunma 376, Japan
[3] Gunma Univ, Grad Sch, Dept Mech Syst Engn, Kiryu, Gunma 376, Japan
来源
PRECISION INSTRUMENTATION AND MEASUREMENT | 2010年 / 36卷
关键词
Simulation; Modeling; Nonlinear Vibration; FEM; Viscoelastic Material;
D O I
10.4028/www.scientific.net/AMM.36.205
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
To compute dynamic characteristics of nonlinear viscoelastic springs with elastic structures having huge degree-of-freedom, Yamaguchi proposed a new fast numerical method using finite element method. In this method, restoring forces of the springs are expressed using power series of their elongation. In the expression, nonlinear hysterisis damping is introduced. Finite element for the nonlinear spring having complex coefficients is expressed and is connected to the elastic structures modeled by linear solid finite element. Further, to save computational time, the discrete equations in physical coordinate are transformed into the nonlinear ordinary coupled equations using normal coordinate corresponding to linear natural modes. In this report, the proposed method is applied to simulation for impact responses of a silicone block with an elastic structure (a S-shaped structure) by colliding with a concentrated mass. The concentrated mass has initial velocities and collides with the silicon block. Accelerations of the elastic structure and the concentrated mass are measured using Levitation Mass Method proposed by Fujii. The calculated accelerations from the proposed FEM, corresponds to the experimental ones.
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页码:205 / +
页数:2
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