The Design Of Steel-Net Pad Damper Based On Spectrum Response

Steel-net pad damper is widely used in vibration and noise reduction because of it’s good performance compared with other dampers. The 3D finite element model of the steel-net pad damper can be conveniently designed and analyzed, as well as the adjustment of the parameters. The previous studies are mainly on the harmonic response, transient response and simple random response. But any kind of vibration are essentially non-stationary, so the study of non-stationary random vibration of the3 D finite element model of the steel-net pad damper is very important. In addition, studying the influence of the material parameters on the response of the 3D finite element model can provide the basis for the design of a suitable Steel-net pad damper. For the complex structure with damper, the calculation of 3D finite element model is very slow, So we need to find a more simple and quick method for the study of the response of the damper in engineering application.This paper establish the dynamic mechanical model based on the hysteresis characteristics of steel-net pad damper. And calculate the response by non-stationary random excitation based on the assumption that at each discrete time, a nonlinear system can be equivalent to a linear time-invariant system. At the same time, the influence of the material parameters on the dynamic response of the steel-net pad is investigated, and the optimal design of the damper is carried out. In the end, the problem of the response of the complex model with steel-net pad damper is investigated, and a generalized static reduction method is explored to reduce the freedom of the model. These studies provide a foundation for the design of the steel-net pad damper in practical engineering application.