The finite model of the derrick and drilling platform connecting unit is built and the natural vibration frequency and the corresponding vibration mode of it are given here.
建立了该钻机井架与钻台结合体固有振动特性理论分析的有限元模型并给出了其固有振动频率结果和相应的主振型。
Semi-submersible drilling platform is key equipment for deep water exploitation and dual derrick RIGS has been main platform of 6th semi-submersible drilling platform.
半潜式钻井平台是深海石油勘探开发的关键设备，而双井架钻机已逐渐成为第六代深水半潜式平台的主流配置。
Move the personnel platform slowly and cautiously without any sudden jerking of the crane, derrick, or platform;
缓慢谨慎地移动载人平台，吊车、塔吊或平台不能突然猛拉（突然迅速移动）。
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