关键词: 弹性机构, 非线性本构, 阻尼合金

Abstract: For the developed Al-33Zn-6Si damping alloy material samplings, responses curves of decay vibration excited by impulse forces of different amplitudes are measured. It is found that the dissipation factor raises with the increase of strain amplitude. A nonlinear function is fitted for describing the relation between dissipation factor and strain amplitude. Based on above fitted relation and equivalent viscous damping theory, a nonlinear constitutive equation of damping alloy depending on strain amplitude and frequency is put forward. According to the virtual work principle for elastomer, the dynamic equations of elastic linkage mechanisms containing damping alloy parts are deduced. A high efficient com-putational algorithm for solving this complicated equations is de-veloped by combining the state variable and the Pade approaching methods. The analytical results are agreed with that of experiment, showing the correctness and validity of the present study.

Key words: Damping alloy, Elastic mechanism, Nonlinear constitution