钢丝网垫减振器结构动响应计算

本文根据钢丝网垫减振器特性,建立了非对称的参数模型并采用单自由度强迫振动试验进行有关参数的识别.在此过程中,解决了位移时域信号的降噪和峰值点的精确确定问题,将非线性参数识别转化为分段线性的参数识别.进一步结合所建模型的特点推导出了含非线性钢丝网垫减振器复杂结构动力学响应的计算方法,并以某试验结构为例计算分析响应特性,结果与试验吻合较好.本文的研究为钢丝网垫减振器在工程中的广泛应用提供了理论支持.

RESPONSE ANALYSIS ON STRUCTURES WITH STEEL-NET DAMPER

Based on the features of a steel-net damper, an unsymmetrical parameter model was established and identification of related parameters achieved through conducting single degree of freedom forced vibration test. In this process, problems of reducing the noise of the displacement signal and spotting precisely its peak point were solved; and nonlinear parameter identification was changed into piecewise linear identification of parameters. Based on the steel-net damper model, a method for calculating the dynamic response of the complex structure was deduced, involving nonlinear steel-net dampers. With the test structure as a sample, the response characteristics of the complex structure were calculated. Its result matches well with the experiment. This study lays a theoretical foundation for the application of the nonlinear damper in engineering.