波能耗散的结构阻尼损耗因子度量方法

根据波动理论，用Timoshenko梁理论在高频范围内分析能量的耗散，通过重建作为频率函数的色散关系曲线，得到动力粘弹性模量及材料的损失因子。根据动力系统的固有特征方程与材料弹性特性的关系，研究利用阻尼损耗因子定量描述在高频情况下，波在结构中传播时的能量耗散效应以及结构阻尼损耗因子的表示方法，并通过实验利用波的色散关系估计结构的动力粘弹性模量，理论分析和实验结果表明了这种方法的可行性。

Measurement of Wave Energy Dissipated by Specific Damping Capacity

In this paper, according to the wave propagation theory, the dynamic viscoelastic modulus and loss factors for the material are obtained by reproducing the dispersion relation. The energy dissipated is given in terms of the specific damping capacity of the structure, which gives a measurement of energy dissipation. A scheme based on the correspondence principle to obtain an estimation of the specific damping capacity was derived. It makes use of an intrinsic equation of the dynamic system, and about the correspondent material properties to give an implicit expression for the energy dissipated. Furthermore, the viscoelastic material properties are experimental derived, analytical and experimental results are jointly performed to corroborate the validity of the method.