HJJ31547海洋钻机井架的风动力学分析。

摘要

对大多数的石油井架来说，一般都只采用等效静力计算方法来验证或指导井架使用。通过预应力模态分析、谐响应分析，对HJJ31547海洋钻机井架进行了风动力学计算，计算结果表明，HJJ31547海洋钻机井架没有全包覆式防风墙，也不存在大跨屋盖结构，其低阶固有频率超过2．00Hz，井架不属于风敏感结构；海洋钻机旋转设备的振动不会引起井架共振；当暴风作用频率接近4．30Hz时，可能对井架产生共振破坏。该项研究可有效指导井架的设计和现场应用。%As far as most rig derricks are concerned, the equivalent static calculation method is generally a- dopted to verify or guide the use of derricks. A wind dynamic calculation of Model HJJ31547 offshore drilling der- rick was carried out through prestressed modal analysis and harmonic response analysis. The calculation shows that, （ 1 ） the derrick is not a structure sensitive to the wind ; （2） the vibration of rotary equipment on the rig may not cause the resonance of the derrick ; （3） the resonance on the derrick may appear when the acting frequency of the windstorm is close to 4. 3 Hz.