半潜式生活支持平台碰撞敏感性研究

为解决钻井平台服务的半潜式生活支持平台在动力定位或系泊系统失效时会与钻井平台发生碰撞问题,通过不同碰撞速度与不同碰撞位置下的对比分析,研究了两者对于生活支持平台碰撞特性的影响。利用SpaceClaim-HyperMesh软件联合建立了生活支持平台与钻井平台计算模型,从实际靠泊作业出发,确立了对比分析的碰撞速度与碰撞位置。从碰撞力变化、结构损伤、能量转化方面进行了对比分析,得出以下结论:碰撞速度影响碰撞力峰值与结构损伤范围,碰撞力变化在不同碰撞速度下大致相同;随着碰撞速度增大,平台吸收动能占比增大,变形能占比下降;30°斜向撞击时,碰撞剧烈程度明显低于对中正撞,碰撞力峰值小很多,更多的初始动能转化成了2座平台的动能,大幅减少了变形能的吸收,缩短了碰撞持续时间。

Sensitivity Analysis of the Collision for a Semi-submersible Living Platform

The semi-submersible living platform may collide with the drilling platform under the failure of dynamic positioning system and mooring system.This problem has been investigated through the comparison of different collision speeds and positions which have impacts on the collision characteristics of the living platform.The living platform and drilling platform are established by SpaceClaim and HyperMesh.The collision speeds and positions are determined by the real situation and conclusions are obtained based on the collision force,structural damage and energy transformation.The results show that collision speed has impacts on the peak value of collision force,as well as the range of structural damage.The variation of collision force is approximate same with different collision speeds.With the increase of the collision speed,the ratio of kinetic energy absorbed by platform grows up and the ratio of deformation energy decreases.The peak value of collision force with 30°collision is dramatically lower than the centered collision.The more initial kinetic energy is found to become the kinetic energy of two platforms.It largely reduces the absorbability of deformation energy and collision time under this situation.