与海上采油平台的基础不同,用于海上风力发电机的吸力式桶形基础不但承受着上部结构所传来的竖向荷载V、风浪等引起的水平荷载H,还承受着叶片等旋转机构传来的扭矩T。在swipe加载方法和固定位移比加载方法的基础上,建议了荷载-位移联合搜索方法。采用该方法对于桶形基础在V-H、V-T、H-T荷载平面内以及V-H-T非共面复合加载条件下的稳定性进行了三维有限元数值分析,得到了V-H-T荷载空间内的破坏包络面。由此可根据实际的受力状态与该破坏包络面之间的相对关系,评价实际荷载状态下海上风力发电机桶形基础的稳定性。 Unlike the offshore oil platform, the suction bucket foundation used for offshore wind turbines not only receives the horizontal load H caused by the vertical load V, wind waves and so on from the superstructure, but also inherits the influence of rotating mechanisms such as vanes T Based on the method of swipe loading and the method of loading fixed displacement ratio, the load-displacement joint search method is proposed. The stability of the bucket foundation under the V-H, V-T, H-T load planes and V-H-T non-coplanar complex loading conditions was analyzed by this method. The failure envelopes in the V-H-T load space were obtained. Therefore, the stability of the offshore wind turbine barrel foundation under the actual load can be evaluated according to the relative relationship between the actual stress state and the failure envelope.