Structural damping determination by finite element approach

被引:44
作者
Gounaris, GD
Anifantis, NK [1 ]
机构
[1] Univ Patras, Dept Mech Engn, Machine Design Lab, Patras 26500, Greece
[2] Hellen Resister Shipping, Dept Res & Dev, Piraeus 18535, Greece
关键词
D O I
10.1016/S0045-7949(98)00257-0
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
An iterative numerical method is described by which the non-linear material damping of a structural member can be evaluated in a simple way. It is shown that the results of a conventional finite element approach can be combined with the damping-stress function, which is assumed to be known from experimental data, to obtain the loss factor of a particular structure. For this reason the dynamic stiffness concept is utilized in which the imaginary part of the modulus of elasticity is a function of stress range. Since stress amplitude depends also on the amount of damping present in structure. a numerically iterative scheme is developed for the computation of the non-linear structural damping. Independently of the type of intercoupling between stress distribution function and damping-stress function, suitable solutions may be obtained to yield the loss factor of a particular member. This fast converging approach is accurate, stable and may be generalized to ev;evaluate the loss factor for any structure. (C) 1999 Civil-Comp Ltd and Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:445 / 452
页数:8
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