不同浪向的波浪载荷作用下导管架平台主桩强度分析

Analysis on the Main Pile Strength in Jacket Platform under Wave Induced Load Effects with Different Wave Directions

以包括泥面以下桩基在内的所有杆件所构成的桁架式导管架平台为对象,首先通过数值模拟计算组成导管架平台的每一构件的波浪载荷,然后以有限元算法建立包含了平台桩基土反力等因素的导管架整体结构的力学模型,将计算所得波浪载荷施加到该有限元力学模型上,以此通过数值计算手段分析平台中包括泥面以下主桩在内所有杆件的最大应力分布以及桩基的位移特征,从而对平台在特定的波浪环境下的平台主桩的安全性问题进行观察。所提出的方法可为导管架平台在波浪环境下主桩的强度特征分析提供一种实用手段。

A truss-type jacket platform is taken as the research object, which consists of all members including the pile foundation beneath seabed. Firstly, the wave induced load on every underwater member of the platform is calculated by numerical simulation. Then the mechanical model of the integral platform structure is established based on the finite element algorithm with the factors like soil reaction considered. The calculated wave loads on platform members are exerted on the mechanical model to compute and analyze the maximum stress distribution and displacement features along all members including the foundation piles in the platform, thus evaluating the safety of foundation piles of the platform under a specific wave environment. The proposed numerical method can provide a practical way to analyze the strength features of the main members of a truss-type jacket platform under wave environment.