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研究了随机波浪载荷作用下调谐质量阻尼器(TMD)对桩基钢结构海洋平台的减振效果,采用谱分析法对TMD参数进行优化,优化TMD 使平台的位移响应标准偏差比无TMD下降12.4% 。并研究了TMD参数在优化域内的失调对响应的影响,TMD刚度失调比阻尼失调要敏感,欠阻尼失调比过阻尼失调要敏感。从振害累积概念出发,对谐激励下SDOF- TMD的Randall参数优化方法提出了改进。
The damping effect of TMD on the offshore platform with pile-based steel structures under random wave loads is studied. The TMD parameters are optimized by spectral analysis, and the TMD is optimized to reduce the standard deviation of the displacement response of the platform compared with no TMD. .4%. The effects of TMD parameters on the response were studied in the optimization domain. The TMD stiffness mismatch was more sensitive than the damping mismatch, and the less damped mismatch was more sensitive than the overdamping mismatch. Based on the concept of vibration accumulation, the Randall parameter optimization method of SDOF-TMD under harmonic excitation is proposed.