兆瓦级风电机组机舱罩稳定性分析

Stability Analysis of the Nacelle of Megawatt Wind Turbine Generators

失稳往往成为薄璧受压结构破坏的主要表现形式,且失稳载荷通常远小于强度破坏载荷,同时由于失稳过程的突发性和强破坏性,一旦结构发生失稳往往将带来灾难性后果。以一种典型的薄璧结构——风机机舱罩为对象,通过建立其有限元模型,并对其进行设计载荷作用下的稳定性分析,校核了机舱罩的稳定性情况,对机舱罩的工程设计具有重要的指导意义。

Unstability is the main form of structure damage for thin wall compressed structure,and the unstability load isalways far less than the destroy load. Since the unstability takes place so fast and has strong destructive effect,unstabilityusually has serious consequences. This paper takes nacelle of wind turbine,a typical thin wall structure,as the researchobject. Through building up of a finite element model,a stability analysis was carried out under designed loads and stabilitystatus of the nacelle was checked. This study will have guiding significance to the engineering design of nacelles.