箱式超大型浮体水弹性分析的弹性地基梁法

摘要

Efficient and accurate estimation of mat-like VLFS's hydroelastic responses in waves is very important for the design. Within the category of simplified methods, the beam on elastic foundation (BOEF) model seems to be the simplest. In this paper, a comparative study is carried out to four BOEF models.They are denoted as S Y BOEF,T_BOEF,S_BOEF and A_BOEF models respectively. It is found that the S Y BOEF model proposed by Suzuki and Yoshida[11,12] are too conservative to be used but the other three BOEF models are able to predict the hydroelastic responses of VLFS in head seas reasonably.The A_BOEF model extended from S_BOEF model[20] by present authors [21] is regarded to be the best both in terms of consistency and accuracy.The BOEF model is very simple and efficient for calculation and is readily applied for practical design.%如何快速而精确地估计箱式超大型浮体在波浪中的水弹性响应是设计中需要解决的一个重要问题.在所提出的各种简化分析方法中,弹性地基梁模型是最简单的.本文选择了四种弹性地基梁模型进行比较研究.它们分别称为A_Y_BOEF,T_BOEF,S_BOEF和A_BOEF模型.通过研究发现,由Suzuki和Yoshida提出的S Y BOEF模型显得太保守而不适合于实际应用,而其它三种模型是能够合理地估计箱式超大型浮体的水弹性响应的.相比而言,由S_BOEF模型延伸出的A_BOEF模型从概念上的一致性和精度方面都是最好的.弹性地基梁模型的最大优点是简单,可以很方便地在工程设计中应用.