摘要
在建立的伞式混流式水轮发电机组振动完善模型的基础上,引入各参数的区间性,结合区间算法和随机摄动理论,推导了水电机组各传导路径的传导力及传导率的上、下限和均值的计算表达式,建立了具有区间参数的水电机组-厂房耦合系统的振动传导分析方法。通过算例,分析了结构参数不确定性对传导率的影响,验证了模型和方法的合理性与可行性。该方法能够反映参数不确定时振动传导路径传递率的范围及敏感性等问题,为全面分析水电机组振动传递特性提供理论基础和数据支撑。
The vibration model of an umbrella type mixed-flow turbine generator set was established. The computational expressions for the lower bond, the upper one and the mean value of conduction force and transmission rate of each conduction path were derived using the interval factor method and the random perturbation theory. The vibration path trans-missibility analysis method was established for a hydro-power unit-work shop coupled system with interval parameters. With an example, the effects of the uncertainty of structural parameters on the transmission rate were analyzed, the rationality and feasibility of the model and method presented here were verified. It was shown that this method is able to determine the range and sensitivity of the vibration path transmissibility. The results provided a theoretical basis and a data support for a comprehensive analysis of a hydropower unit's vibration transfer characteristics.
出处
《振动与冲击》
EI
CSCD
北大核心
2017年第7期21-25,共5页
Journal of Vibration and Shock
基金
国家自然科学基金资助(51379030)
河南省基础与前沿技术研究资助(162300410053)
关键词
区间参数
随机参数结构
传导路径
水电站
interval parameters
stochastic perturbation method
transfer path
hydropower station