波浪载荷下结构尺度差异对导管架平台结构响应的影响

The Effects of Jacket Platform Structure Differences on Its Structural Responses under the Action of Wave Loading

以某一导管架平台为分析计算对象,首先根据Morison方程计算组成导管架平台各不同构件的波浪载荷,然后将其施加到有限元力学模型上。在此基础上计算不同构件尺度的导管架平台在波浪环境载荷作用下各构件关键位置的内力。通过对比不同尺度下导管架平台内力变化的趋势,观察不同平台杆件的尺度变化以及部分杆件由于断裂的原因而导致强度支撑作用的缺失对平台结构强度的影响,以此指导平台结构设计中的受力杆件优化设计计算。计算结果表明:所采用的计算方法可以对平台设计和优化等进行有效的计算,所提出的方法可为导管架平台在波浪力作用下构件外载荷分析、在这些载荷作用下平台的动力响应特性评估,以及平台杆件的结构优化计算提供技术依据。

A jacket platform is taken as the research object,the wave loadings on different constitutive members of the platform is first evaluated by Morison equation.These loadings are then exerted to a finite element mechanical model to evaluate the strength reaction under these loadings.The internal forces of the key members in the platform in different dimension under the wave loadings are analyzed.The influences to the platform structure strength duo to the variation of platform member＇ s dimensions and deficiency of support function of broken members are observed by comparing the variation tendencies of internal forces of platform members with different dimensions.Numerical method proposed can be applied to the optimal computation in platform structural design.The numerical results indicate that effective computation in platform optimal design can be made with the proposed method,and the technical bases can be provided for the hydrodynamic loading analyses on the jacket platform structure under wave actions,evaluation to dynamic response of the platform under the hydrodynamic loading,and optimal computation to the platform members.