海洋石油平台TMD振动控制及参数优化  

Parametric Study and Optimized Design of a Passive Tuned Mass Damper for an Offshore Oil Platform

作　　者：陆建辉[1] 彭临慧[1] 李华军[1] 

机构地区：[1]青岛海洋大学,青岛266003

出　　处：《青岛海洋大学学报（自然科学版）》1999年第4期733-738,共6页Journal of Ocean University of Qingdao

摘　　要：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。This paper presents the results of a parametric study on passive tuned mass damper (TMD) for a fixed type steel offshore oil platform modeled as a single degree of freedom (SDOF) system. Given the mass ratio and structure condition, the TMD parameters of stiffness and damping are optimized to minimize the variance of deck motion for random wave forces. The optimized TMD results in a 12.4% reduction in response to the variance of deck motion for design conditions (mass ratio equals 2%, speak frequency of the JONSWAP spectrum equals 0.85rad/sec and significant wave height equals 6m). The effect of detuning on some optimized TMD parameters on the performance is studied, indicating that the response of deck motion with detuning of stiffness is more sensitive than that of damping, near the point of optimized damping the detuning of underdamping is more sensitive than that of overdamping. Harmoic excitation analysis for a SDOF-TMD system is made and compared with Randall's method with Eq.4 conditions.

关 键 词：海洋平台 振动控制 优化设计 参数优化 

分 类 号：P715.41[天文地球—海洋科学]