自升式平台管结构碰撞损伤机理研究

文章以自升式海洋平台桩腿直管结构为研究对象,采用简化解析法和有限元数值仿真法对其在侧向冲击载荷作用下的变形机理进行了研究。文中首先基于前期试验,对管结构的变形模式进行了简化,并利用塑性力学理论求解出管结构的碰撞力与撞深解析表达式。然后利用有限元软件ABAQUS,对管结构的动态响应进行了数值模拟,将得到的碰撞力与撞深曲线与解析结果对比,以此验证文中解析方法的准确性。该文的研究成果可以为大型平台结构碰撞性能研究提供技术支撑。

Research on the collision performance of circular tube of jack-up platform

Based on the circular tube of jack-up platform legs, simplified analytic method and finite element numerical simulation method are presented of the problem of collision performance of circular tubes under impact loading. Based on the test, the plastic deformation mode of circular tube was simplified to obtain the analytical expression between the collision force and the impact depth. Then software ABAQUS was used to simulate the dynamic response of circular tube, and the comparison of the impact force-deflection curve be-tween modified analysis and simulation was made to validate the accuracy of simplified analytic method. The results of this paper can provide technical support for the research on large scale platform structure collision performance.