多模块箱型浮式防波堤强度分析方法研究

Research on the strength analysis method of multi-module box-type floating breakwater

针对弹性连接的多模块箱型浮式防波堤的结构强度分析,本文提出一种新的模型约束方法,将多模块箱型浮式防波堤间的弹性连接结构简化为弹簧并实现载荷传递,在每个模块的止链器处采用弹性约束以防止其发生刚性位移并模拟锚链的约束作用,采用三维势流理论对超长箱型浮式防波堤进行载荷计算和强度分析。结果表明,每个箱型浮式防波堤模块在中部因中垂现象产生较大应力,相比其他模块中间模块和两端模块的应力较大,并通过和刚性连接结构强度分析对比发现,由于刚性连接结构无法释放自由度,采用弹性连接计算所得的应力结果要比采用刚性连接结构的小62.07%。本文研究成果可为今后多模块浮式防波堤的结构强度校核提供参考。

A new model constraint method is proposed for the structural strength analysis of elastically connected multi-module box-type floating breakwaters.The elastic connection structure between multi-module box-type floating break-waters is simplified as a spring and realizes load transfer.The elastic restraint is used on the chain stopper of each module to prevent rigid displacement and to simulate the restraining action of the anchor chain.Three-dimensional potential flow the-ory is used to calculate the load and analyze the strength of the super-long box floating breakwater.The results show that the middle sag phenomenon produces a large stress in the middle of each box-type floating breakwater module.Compared with other modules,the stress of the middle module and the two-end module is larger.Because the rigid connection structure can not release the degree of freedom,the stress result calculated by the elastic connection is 62.07%less than that by the rigid connection structure.The research results of this paper can provide reference for structural strength check of multi-module floating breakwater in the future.