Optimal design theory for linear tuned mass dampers(TMD) has been thoroughly investigated,but is still under development for nonlinear TMDs.In this paper,optimization procedures in the time domain are proposed for design of a TMD with nonlinear viscous damping.A dynamic analysis of a structure implemented with a nonlinear TMD is conducted fi rst.Optimum design parameters for the nonlinear TMD are searched using an optimization method to minimize the performance index.The feasibility of the proposed optimization method is illustrated numerically by using the Taipei 101 structure implemented with TMD.The sensitivity analysis shows that the performance index is less sensitive to the damping coeffi cient than to the frequency ratio.Time history analysis is conducted using the Taipei 101 structure implemented with different TMDs under wind excitation.For both linear and nonlinear TMDs,the comfort requirements for building occupants are satisfi ed as long as the TMD is properly designed.It was found that as the damping exponent increases,the relative displacement of the TMD decreases but the damping force increases.
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机译:The study of a fuzzy set theory for the selection of an optimum coal transportation system from pit to the power plant <中文篇名〉=矿坑至电厂最佳煤炭运输系统选择的模糊理论 研究