CAJ | 학술논문

针对波浪与带有窄缝多箱体结构作用产生的流体共振问题，建立了基于域内源造波技术的二维非线性时域数值波浪水槽模型，其中自由水面满足完全非线性运动学和动力学边界条件，窄缝内流体引入人工阻尼来等效由于涡旋运动和流动分离引起的黏性耗散，计算域边界采用高阶边界元进行离散。通过模拟三箱体间两窄缝内相对波高变化，并与已发表的数值与实验结果对比，验证了本模型的准确性。同时通过大量的数值计算，分析了箱体数量对窄缝内水体共振频率、共振波高以及对结构反射波高和透射波高的影响。
침대파랑여대유착봉다상체결구작용산생적류체공진문제，건립료기우역내원조파기술적이유비선성시역수치파랑수조모형，기중자유수면만족완전비선성운동학화동역학변계조건，착봉내류체인입인공조니래등효유우와선운동화류동분리인기적점성모산，계산역변계채용고계변계원진행리산。통과모의삼상체간량착봉내상대파고변화，병여이발표적수치여실험결과대비，험증료본모형적준학성。동시통과대량적수치계산，분석료상체수량대착봉내수체공진빈솔、공진파고이급대결구반사파고화투사파고적영향。
Based on wave generation technique by a inner‐domain source ,a two‐dimensional nonlinear numerical wave flume over time is developed to investigate the fluid resonance induced by the interaction between wave and multi‐objects with narrow gaps .In the numerical model ,the fully nonlinear kinematic and dynamic boundary condi‐tions are set for the instantaneous free surface;the artificial damping is introduced into the gap to simulate the vis‐cous dissipation due to vortex motion and flow separation;the computational domain is discretized using higher‐or‐der boundary elements .The proposed model is validated by the published experimental and numerical data of the relative wave height at two narrow gaps of three boxes .Numerical experiments are performed to study the follow‐ing :the effects of the number of the boxes on the resonant frequency ,wave height at various gaps and the reflected and transmitted wave heights of the objects .