摘要
以某在建大型水电站地下厂房结构为例,建立了地下厂房结构的三维有限元计算模型,全面分析了不同的边界条件、风罩形式、材料下的机组支承结构的自振特性并进行了共振校核,采用谐响应法计算结构的动态响应,对最大振幅进行了校核。结果表明,该模型为地下厂房结构的优化设计、改进抗振特性及确保机组安全运行提供了理论依据。
Based on under-construction underground powerhouse structure of a certain large hydropower station, dynamic characteristics of powerhouse unit structure are analyzed. 3D finite element models of underground powerhouse structure are constructed. Natural vibration characteristics of generating unit support structure are analyzed comprehensively and the structure resonance vibration is checked by considering effects of different boundary conditions, different wind tunnels and various materials. Dynamic responses of the structure are calculated by using harmonic response method and maximum amplitudes are checked. Research results provide theoretical basis for optimal design of underground powerhouse structure, improving vibration resistance performance and secure operation.
出处
《水电能源科学》
北大核心
2009年第5期97-99,57,共4页
Water Resources and Power
关键词
地下厂房
动力特性
三维有限元法
谐响应法
underground powerhouse
dynamic characteristics
3D-FEM
harmonic response method
