CAJ | 학술논문

双圆柱形浮体作为吸收波浪能量的载体已在实际中得到应用，其振动特性研究对于波能装置设计及提高转换效率具有指导作用。文章采用线性波理论和特征函数展开匹配法，求解了双圆柱形浮体垂荡辐射问题和绕射问题，基于粘性阻尼吸取波浪能，建立了振荡浮体的一维运动方程，以此方程推导了波能装置的振动特性和转换效率表达式。数值分析表明波能装置的固有振荡周期是随入射波周期变化而变化的，水下浮体对振荡浮体的振荡和能量转换特性有一定的影响，但只要两者的距离适当远，水下浮体对波能装置的振荡特性和转换效率的影响可忽略不计；研究表明根据不同的波况正确选择弹性系数和外部阻尼可提高波能装置的转换效率。
쌍원주형부체작위흡수파랑능량적재체이재실제중득도응용，기진동특성연구대우파능장치설계급제고전환효솔구유지도작용。문장채용선성파이론화특정함수전개필배법，구해료쌍원주형부체수탕복사문제화요사문제，기우점성조니흡취파랑능，건립료진탕부체적일유운동방정，이차방정추도료파능장치적진동특성화전환효솔표체식。수치분석표명파능장치적고유진탕주기시수입사파주기변화이변화적，수하부체대진탕부체적진탕화능량전환특성유일정적영향，단지요량자적거리괄당원，수하부체대파능장치적진탕특성화전환효솔적영향가홀략불계；연구표명근거불동적파황정학선택탄성계수화외부조니가제고파능장치적전환효솔。
Double cylindrical floats were proposed as a device for extracting energy from waves. The study on the oscillating property of the device can help to design the device and improve the conversion efficiency of the device. Based on the linear wave theory and the method of matched eigenfuntion expansions, the ve-locity potential about the radiation and diffraction problems is derived for the two-body system. Consid-ering the viscous damper resistance absorbing the wave energy, the one-dimensional dynamics equation is formed. The expressions about the oscillating properties and the conversion efficiency of the device are de-duced from the equation. Numerical calculation indicates that the natural period of the device varies with the incident wave period and the presence of the submerged cylinder has effect on the oscillation proper-ties and the conversion efficiency, while its influence can be ignored if the distance of the cylinders is appro-priate. It is found that choosing the right coefficient of elasticity and external damping can improve the wave conversion efficiency according to different wave conditions.