基于施工监测数据的混塔转接段承载性能研究OA

In steel-concrete hybrid wind turbine towers,the adapter ring serves as a transitional component that connects the steel tower section with the concrete tower section.Its bearing capacity directly influences the operational safety of the entire wind turbine.Prior to assembling the steel tower,prestressing the adapter ring is essential to ensure the stability of the lower structure,which is also one of the primary loading conditions during the construction phase.Under prestressing loads,the adapter ring experiences a complex spatial stress state,making the monitoring of its mechanical properties crucial during construction.Based on an actual engineering of a prefabricated hybrid tower,the mechanical performance of the adapter ring after prestressing was monitored during construction.By analyzing the monitored strain data at key points on the adapter ring and comparing the results with the finite element model,the validity of the finite element model and the safety of the adapter ring during construction were verified.Building upon this FE model,a parametric analysis was conducted to investigate the key parameters that most significantly affect the yield capacity of the adapter ring.The findings indicate that the concrete strength and the thickness of the stiffeners have the greatest impact on the yield capacity of the adapter ring.Finally,an early warning study on the load-bearing performance of the adapter ring,based on stress thresholds,was proposed,offering valuable insights for the performance warning research of adapter rings during the operational phase.