CAJ | 학술논문

为研究海上多腿浮式结构在收放桩腿的过程中水动力特性的变化规律，对某风电安装船结构进行了合理简化，使用有限元方法建立了多腿支撑结构的水动力模型，按水下桩腿长度的不同对结构划分了5种工况，探讨了船身、桩腿、桩靴的湿面单元划分，以所建模型为基础数值分析了水下桩腿长度对结构所受波浪激励力的影响，给出了结构所受波浪激励力（矩）与波浪频率的关系。结果表明：水下桩腿长度对受力、力矩的影响体现在波浪处于中频段；桩腿对引起垂荡的波浪激励力和引起纵的波浪激励力矩的影响不大，引起横的波浪激励力矩影响较大。
위연구해상다퇴부식결구재수방장퇴적과정중수동력특성적변화규률，대모풍전안장선결구진행료합리간화，사용유한원방법건립료다퇴지탱결구적수동력모형，안수하장퇴장도적불동대결구화분료5충공황，탐토료선신、장퇴、장화적습면단원화분，이소건모형위기출수치분석료수하장퇴장도대결구소수파랑격려력적영향，급출료결구소수파랑격려력（구）여파랑빈솔적관계。결과표명：수하장퇴장도대수력、력구적영향체현재파랑처우중빈단；장퇴대인기수탕적파랑격려력화인기종적파랑격려력구적영향불대，인기횡적파랑격려력구영향교대。
To analyze hydrodynamic characteristics of the floating structure with legs lifting up and down, the struc-ture of a certain type of wind farm installation vessel is simplified and a hydrodynamic model is constructed by utili-zing the FEA method. According to the length of the legs underwater, 5 cases are set up and the meshes of the wet-ted surface on hull, pile legs and pile shoes are discussed. Based on these, the effects of the length of the legs un-derwater on the wave excitation forces/moments borne by structure are calculated by utilizing the potential flow the-ory. The relations between the wave excitation forces/moments and wave frequencies are presented, the results show that the effects of the legs underwater on the forces/moments primarily concentrate on the intermediate frequency range of the waves. There are little effects of the legs on the heave and pitch forces/moments, but there is a remark-able effect on the roll moment.