摘要
采用有限元方法,基于Von-Mises失效理论,考虑平台结构阻尼和惯性载荷,利用ANSYS有限元软件和开源程序软件FAST分别研究了极端海况下风、波、流载荷作用方向相同且为0°、15°、30°、45°和风、波载荷作用方向相同且为0°,海流载荷为15°至180°每15°递增时的平台结构应力。结果表明:最大等效应力是保证平台安全稳定运行的关键且底部圆板上与延伸腿和中央立柱的交接处位置为平台危险区域;风、波、流载荷作用方向对平台应力影响极大,应根据当地海况选择合适的平台安装角度;风、波、流载荷均沿45°方向作用于整机时,平台最大等效应力最大;风、波载荷沿0°方向,海流载荷沿180°方向作用于整机时,平台应力最小。
Basd on the Von-Mises failure theory and finite element method,the platform structure stress was studied by ANSYS finite element software and open source software of FAST in considering the structure damping and inertial load when wind、wave、current were all in 0°、15°、30°、45°direction and wind、wave were all in 0°direction,current in 15°、30°、45°、60°、75°、90°、105°、135°、150°、165°、180°direction respectively. The calculation results showed that the maximum equivalent stress was the key to ensure platform security and stable operation and the joint of the bottom of the circular plate、outspread legs and the central pillar was the dangerous zone; Direction of wind、wave and current load had enormous influence on the stress of the platform and the appropriate platform installation angle should be chosen according to the local sea condition; when wind、wave and current load were all along 45° direction,the maximum equivalent stress was the largest. When wind,wave load were all along 0° direction and current load was along 180° direction,the equivalent stress was the smallest.
出处
《能源工程》
2015年第5期28-34,44,共8页
Energy Engineering
基金
上海市研究生创新基金资助项目(JWCXSL1402)
上海市教育委员会科研创新项目(13YZ066)
国家自然科学基金资助项目(511176129)
关键词
漂浮式风力机
张力腿平台
瞬态动力学
极端海况
强度
offshore wind turbine
tension leg platform
transient dynamics
extreme sea conditions
strength
