【摘要】 针对结构复杂的多自由度海洋平台模型 ,设计了粘弹性阻尼器 ,研究了基于粘弹性阻尼器的海洋平台振动控制及阻尼器的位置优化 ,考虑到粘弹性阻尼器的减振原理 ,采用层间相对位移的均方差作为阻尼器的定位准则 ,使海洋平台受控点的位移响应降低到允许的范围内。针对一个实际的 7自由度的海洋平台计算模型 ,在随机波浪载荷作用下进行了平台振动响应分析及阻尼器的位置优化设计。结果表明 ,大跨安装阻尼器后平台位移响应谱幅度大大地降低。更多还原

【Abstract】 This paper is to investigate the vibration control of an actual offshore platform modeled as a seven-degree-of-freedom system by using a viscoelastic damper. Place the damper in position is quite important for the vibration reduction of the platform, otherwise it is invalid or even harmful. Considering the principle of energy dissipation of viscoelastic material, the root mean square value of the relative displacement between layers is taken as a damper positioning criterion for the displacement response at the controlled points of the platform within the allowable range. The result shows that, with the optimal damper positioning, the displacement of the deck motion under random wave excitations can be suppressed effectively.更多还原