CAJ | 학술논문

水弹性方法针对超大型浮体的刚度特点，充分考虑了结构变形与流体运动的相互作用，是进行结构安全性分析的有效手段。文章采用水弹性分析方法研究了超大型浮体单模块总体波浪载荷以及结构应力响应。首先基于三维有限元方法分析了模块在真空中的总振动模态，然后结合模态叠加法和边界元法计算了模块在流场里面的谐振和模态响应。在此基础上，研究了各模态下结构的应力响应以及总应力响应，并分析了危险载荷工况，评估了超大型浮体单模块的结构强度，研究结果对超大型浮体单模块结构优化设计和安全性评估具有一定的指导意义。
수탄성방법침대초대형부체적강도특점，충분고필료결구변형여류체운동적상호작용，시진행결구안전성분석적유효수단。문장채용수탄성분석방법연구료초대형부체단모괴총체파랑재하이급결구응력향응。수선기우삼유유한원방법분석료모괴재진공중적총진동모태，연후결합모태첩가법화변계원법계산료모괴재류장리면적해진화모태향응。재차기출상，연구료각모태하결구적응력향응이급총응력향응，병분석료위험재하공황，평고료초대형부체단모괴적결구강도，연구결과대초대형부체단모괴결구우화설계화안전성평고구유일정적지도의의。
The method of hydro-elasticity considering the fluid and structure interaction could calculate structural safety of floating structures effectively based on the rigid characteristics of very large floating structures (VLFS), which is used here to analyze the global wave loading and structural stress responses of single module of VLFS. In this paper, the natural mode and shape of vibration and intrinsic frequency are calculated by 3D FEM for single module. Then the harmonic frequency and principal coordinate responses of single module are obtained by mode superposition method and BEM method. Forwards, the structural stress responses of each mode and global stress responses are investigated; meanwhile the dangerous load-ing cases and the structural strength of single module are assessed. The results provide a certain guiding meanings for structural optimized design and safety assessment of VLFS.