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风罩作为地下厂房机墩组合中的重要构筑物,在电站运行期受力特性及其复杂。主要研究温度荷载对风罩应力的影响特征,为结构体型优化及配筋设计提供依据。采用有限元数值模拟方法进行分析,模型选取了机墩根部至发电机层楼板的范围,考虑最不利情况下的运行状态。结果表明,对风罩这种薄壁结构,温度荷载是决定其应力的最主要因素,而且温度荷载不仅对应力的大小起决定因素,对应力的分布形式也有影响,应采取有效措施尽量减小风罩的内外温差,在结构和配筋设计时重视温度荷载的严重影响。
As an important structure of the underground powerhouse pier combination, the wind hood has the characteristics of stress and complexity during the operation of the power station. Mainly studies the temperature load on the windshield stress characteristics, to provide the basis for structural body shape optimization and reinforcement design. The finite element numerical simulation method is used for the analysis. The model selects the range from the base of the pier to the floor of the generator layer, taking into account the operating conditions under the most unfavorable conditions. The results show that the temperature load is the most important factor that determines the stress on the thin-walled structure of the wind shield. Temperature load not only determines the size of the stress, but also affects the distribution of the stress. Effective measures should be taken to minimize Wind hood inside and outside the temperature difference, in the design of the structure and reinforcement serious attention to temperature load.