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本文对重力式海洋平台在地震扰动下的动力反应进行了试验研究和理论研究,主要工作如下; 1.对1:50的重力式平台模型在地震模拟振动台上进行了无水和有水两种情形下的对比试验,测定了模型的自振频率、振型阻尼比和地震反应。2.对重力式海洋平台进行了地震反应分析。所选择的计算模式考虑了地基-结构间的相互作用,并考虑了由于甲板质量存在偏心而引起的扭转效应。用附加质量和附加阻尼的方法考虑了流体-结构间的相互作用。3.用Fortran语言编制了计算机程序,并对所模拟的原型进行了参数研究,得到了原型在地震扰动下的动力反应,可供平台设计人员参考。
In this paper, the dynamic response of gravity offshore platform under earthquake disturbance is studied and studied theoretically. The main work is as follows: 1. The 1:50 gravity platform model is simulated on an earthquake-shaking table with no water and water In the case of comparative tests, the natural frequency, damping ratio and seismic response of the model were measured. Seismic response analysis of gravity ocean platform. The chosen calculation mode takes into account the interaction between the foundation and the structure and takes into account the torsional effect due to the decency of the deck. Fluid-structure interactions are considered with additional mass and additional damping. Computer program is compiled in Fortran language, and the prototype of the prototype is studied. The dynamic response of the prototype under earthquake disturbance is obtained, which is available to the designers of the platform.