基于极点配置的海洋平台粘弹性阻尼振动控制

Viscoelastic damper vibration control of platformwith pole assignment technique

对随机波浪激励的多自由度海洋平台模型进行动力分析,研究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,提出使用极点配置技术实现粘弹性阻尼器的优化定位;粘弹性阻尼器采用开尔文模型,将其对结构的作用看作是位移和速度的反馈控制。针对一海洋平台计算模型,在随机波浪载荷作用下进行平台振动响应分析及阻尼器的位置优化设计,结果表明采用极点配置技术设置粘弹性阻尼器,平台位移和加速度响应得到有效控制。

The dynamic response of an actual multi-degrees freedom offshore platform, Which is subjected to wave loading and equipped with viscoelastic dampers was studied and the position of viscoelastic damper was optimized. The pole assignment technique was used to locate the position of viscoelastic damper and to meet the needs of the structural vibration mitigation. The viscoelastic damper was described by the Kelvin model and its action to the platform was regarded as the feedback of displacement and velocity of the response. The result shows, with pole assignment technique viscoelastic damper equipped in the platform, the response of displacement and acceleration of the platform is greatly reduced.