CAJ | 학술논문

经选型分析后，利用有限元ABAQUS软件对正放四角锥网架进行数值模拟，通过AQUA海工模块施加海洋环境荷载，确定了结构应力、应变较大的关键节点，研究了随机波浪作用下浮式网架结构的振动特性，并分析了尺寸参数对结构应力及承载力的影响。结果表明，受到附加质量影响的顶层球节点附近应力应变较大，结构振型由平动向扭转过渡，设计的四种尺寸方案下，以结构应力较小、相对承载力较大为原则综合考虑进行尺寸优选，最终在给定的参数取值区间内确定了每个参数的合理取值。
경선형분석후，이용유한원ABAQUS연건대정방사각추망가진행수치모의，통과AQUA해공모괴시가해양배경하재，학정료결구응력、응변교대적관건절점，연구료수궤파랑작용하부식망가결구적진동특성，병분석료척촌삼수대결구응력급승재력적영향。결과표명，수도부가질량영향적정층구절점부근응력응변교대，결구진형유평동향뉴전과도，설계적사충척촌방안하，이결구응력교소、상대승재력교대위원칙종합고필진행척촌우선，최종재급정적삼수취치구간내학정료매개삼수적합리취치。
After selection analysis ,numerical simulation using finite element software ABAQUS was conducted on nor-mally placed pyramid space grid .In the marine engineering module AQUA ,the oceanic loads were applied on the grid structure .Through the simulation ,the key nodes of maximum structure stress and strain were determined ,the vibrating characteristics of the floating grid structure under random waves was studied ,the influence of the dimension parameters of the grid on the structure stress and strain was analyzed .The simulation results indicate that the stress and strain around the top global nodes are higher due to the influence of additional quality of the waves ,the vibration type transits from translational motion to torsion .According to the optimization principle of small structural stress and large bearing capaci-ty ,the values of each parameter was determined within the given value range among the 4 designs of dimension schemes .