导管架式海洋平台阻尼隔振及减振技术研究

分析和研究了导管架式海洋平台结构采用阻尼隔振技术的基本原理，建立了阻尼隔振体系简化计算模型，推导了两自由度简化模型，采用强行解耦方法计算结构第一振型阻尼比的计算公式，研究了隔振层参数与结构阻尼比的关系以及它们对结构整件和隔振层层间相对位转的控制效果，进行了在波浪力和地震工况下的数值模拟，结果表明，阻尼隔振方案是导管架式海洋平台的一种有效减振措施，当阻尼隔振层刚度较大时，可以有效控制平台结构的振动。

RESEARCH ON DAMPING ISOLATION TO REDUCE VIBRATION AND VIBRATION CONTROL FOR OFFSHORE JACKET PLATFORM

In this paper, a simple mathematical model of platform is established based on the principle of vibration reduction by using damping layers. The first vibration mode's damping ratio is obtained by a forced decoupling to two freedom degree mode. Also the relations between damping layer parameters and the structural damping ratio including the relative displacement control effect of structure and damping layers are studied. And the numerical simulation under wave force or earthquake force is carried out. The results show that using damping layers to reduce vibration is an effective measure. When the rigidity of damping layers is great, the structural vibration can be controlled effectively.