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利用有限元数值分析软件对复合加载模式下海上风机桩基础破坏机制进行了详细地研究,确定了竖向荷载V、水平荷载H和力矩荷载M共同作用下桩基础的破坏模式及在荷载空间(V,H,M)中的破坏包络面。采用固定位移比加载方法对桩基础在V-H、V-M、H-M荷载平面内的破坏模式分别进行了三维有限元分析研究,分析得到海上风机桩基础在不同荷载分量组合条件下的失稳破坏机制和V-H-M荷载空间内的破坏包络面。由此可根据破坏包络面与实际桩基受力状态之间的相对关系,评价实际荷载状态下海上风力发电机桩基础的稳定性。
The failure mechanism of offshore wind turbine pile foundation in composite loading mode was studied in detail by using the finite element numerical analysis software. The failure modes of pile foundation under vertical load V, horizontal load H and moment load M and the failure mode of pile foundation in load space V, H, M) in the destruction of the envelope. Three-dimensional finite element analysis of failure mode of pile foundation in VH, VM and HM load planes was carried out by using fixed displacement ratio loading method. The failure mechanism of offshore foundation pile under different load components and the failure mechanism of VHM Destruction envelope in load space. Therefore, the stability of offshore wind-driven pile foundation under actual load can be evaluated according to the relative relationship between the failure envelope and the actual stress state of pile.