Dynamic Characteristics Of Periodic Structures With Damping

This paper bases on periodic theory of solid-state physics to study the dynamic characteristics of the layered and pile barriers structures with damping in Civil Engineering.Firstly,we utilize the PWE method to calculate the complex dispersion relationship of the periodic structures with damping.And then,the propagation characteristics of SV-waves and P-waves in the periodic structures have been simulated by using of the finite element software.The main research contents will be shown as follows:1、The PWE method is used to calculate the complex dispersion curve of a layered periodic structure which includes damping and the result shows that the attenuation index increases because of the considering of damping.2、For the layered periodic structure,we have simulate the dynamic characteristics of it by utilizing of the finite element software.The results show that the layered periodic structure with damping possesses the superior performance of vibration isolation than the one takes no account of damping.3、The complex dispersion curve of a pile barrier periodic structure with damping is calculated by the PWE method.The existence of damping will enhance attenuation index and it causes the separation of the degeneracy of the complex bands.4、We utilize the COMSOL to simulate the dynamic characteristics of the pile barrier periodic structure with damping that we have designed.Apparently,the damping enhances the attenuation of the periodic structure.