鹰式波浪能装置旋转碰撞的结构损伤过程研究  

Study on the Structural Damage of the Eagle Type Wave Energy Converter Due to the Rotating-Collision Process

作　　者：陈爱菊[1,2] 游亚戈[1] 盛松伟[1] 彭雯[1] 

机构地区：[1]中国科学院广州能源研究所,广东广州510640 [2]中国科学院大学,北京100039

出　　处：《海洋技术》2014年第4期6-11,共6页Ocean Technology

基　　金：国家海洋可再生能源专项资金资助项目(GHME2013ZB01);国家自然科学基金-青年科学基金资助项目(51109201)

摘　　要：鹰式波浪能装置发电效率较高但抗浪性能较差,在实海况运行时出现门型限位梁被撞坏的情况。为防止装置被进一步破坏,本文研究了限位梁被撞坏的损伤机理,并改进了装置的限位方案。利用非线性有限元程序ANSYS/LS-DYNA对鹰头吸波体背部的5个防撞块与限位梁的旋转碰撞过程进行了仿真分析,吸波体、限位梁及橡胶防撞块分别采用刚体、弹塑性材料和橡胶材料进行模拟,并考虑了吸波体及限位梁运动惯性的影响,获得了能量分布曲线、结构应力分布及变形图等结果,仿真结果与限位梁实际损坏情况较吻合。分析可知,利用碰撞对吸波体进行限位容易使限位梁发生屈服失效,并提出了改进方案,即通过增设蓄能器将吸波体多余的动能有效吸收,从而保护装置不被破坏。The Eagle Type wave energy converter（WEC） is advantageous in high power generation efficiency but weak in wave- resisting performance. Its end beam was broken up during the real sea experiment. To prevent further destruction, this paper studies the damage mechanism of the end beam and proposes an improvement scheme. Based on the explicit nonlinear finite element program ANSYS/LS- DYNA, simulation and analysis were conducted on the rotating- collision process between the end beam and 5 bumper blocks on the back of the wave energy absorber（WEA）. In the simulation, the WEA, end beam and bumper blocks were respectively assumed as the rigid,elastic- plastic and rubber structure, and the inertia effects of the WEA and end beam were taken into account,deriving the curve of energy absorption, structural stress distribution and deformation of the WEA. It is found that the simulation results fit well with the actual damage of the end beam, and limiting the WEA＇s position through collision is apt to bring about yield failure of the end beam. Finally, an improvement scheme is presented to protect the device from damage, which installs the energy accumulator to effectively absorb redundant kinetic energy of the WEA.

关 键 词：波浪能装置 旋转碰撞 ANSYS/LS-DYNA 

分 类 号：P743.2[天文地球—海洋科学] TV31[水利工程—水工结构工程]