| 摘 要： | ![]()
In this paper,a governing differential equation of viscoelastic Timoshenko beamincluding both extension and shear viscosity is developed in the time domain by directmethod.To measure the complex moduli and three parameters of standard linear solid,theforced vibration technique of beam is successfully used for PCL and PMMA specimens.The dynamical characteristics of viscoelastic Timoshenko beams,especially the dampingproperties,are derived from a considerable number of numerical computations.Theanalyses show that the viscosity of materials has great influence on dynamicalcharacteristics of structures,especially on damping,and the standard linear solid model isthe better one for describing the dynamic behavior of high viscous materials.
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