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Abstract: Using viscoelastic theory, a structural damping model with
five control parameters is introduced as the constitutive equation for
damping alloy. Based on the experimental data evaluation, the five
parameters are fitted by using an optimization algorithm. Dynamic
equations of beam element of damping alloy are derived with above five
parameters representing the dissipation and stiffness characteristics.
For the convenience of computation, the established dynamic equations
containing convolution integration are changed into four-order
differential equations. Further, the system dynamic equation of the
elastic linkage mechanism containing damping alloy parts is assembled
according to the kineto-elastodynamics theory. Finally, the state space
method is employed to solve the established high order differential
equations with time-varying coefficients. An example is given to show
that the proposed model is accurate and effective.
Key words: Damping alloy Five parameters Time-domain constitution
Elastic linkage mechanism
CLC No: TH113
国家自然科学基金(50075068)、陕西省科学技术研究发展计划
(2004K06-G23)和西安市科技攻关计划(GG05026)资助项目. Received 20041231, received
in revised form 20050418
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