【摘要】 建立W12-1海洋平台的有限元模型。利用MATLAB编写程序,生成不同有效波高时随机波浪载荷。在不同波浪载荷的作用下,选择合适的ETMD系统参数,获取有ETMD减振系统和无ETMD减振系统情况下海洋平台有限元模型节点的位移时程曲线。对海洋平台振动控制效果进行有限元分析表明:ETMD减振系统能够有效控制海洋平台在随机波浪载荷作用下的振动,平台甲板位移最小减少64.46%,最大减少87.86%;平台整体在不同波浪载荷作用下的平均减振效果分别为67.06%、86.90%和80.01%。更多还原

【Abstract】 The finite-element model of W12-1 offshore platform is established in this paper.Irregular wave loadings of different wave heights are given by making use of the software of MATLAB.Vibration control effect for offshore platform is analyzed finitely under different wave loadings.In order to compare ETMD system’s control effect with NOETMD system’s,the time-history curve of finite point vibration displacement is obtained by using measurable parameter of ETMD system.The simulation shows that the ETMD system has marked effect for vibration control of offshore platforms;the platform displacement can be reduced by 64.46% minimally and by 87.86% maximally compared with that without ETMD system,it can reduce the displacement of offshore platform by 67.06%、86.90% and 80.01% averagely,inspired with different wave loadings.更多还原