摘要
风机桥架的振动特性取决于其结构形式。文章利用有限元分析软件ANSYS对2种不同结构形式的空冷风机桥架进行比较。通过模态分析对比2种风机桥架的刚度和振动频带,并采用谐响应方法对比2种风机桥架在正常运行不平衡力、叶片断裂时不平衡力以及电动机正常运行不平衡力等激振载荷作用下的频率响应特性。分析结果表明,通过优化风机桥架的结构形式可以改善其振动特性。
Vibration characteristics of fan bridge are determined by the structure. Based on ANSYS software, the stiffness and vibration bands of two types of ACC fan bridge structures are analyzed by modal analysis. Furthermore, the frequency response curves under three different vibration loads are calculated separately by harmonic response method, which of the two fan bridges are contrasted. It is demonstrated that the vibration characteristics of fan bridge are improved by structural optimization.
出处
《电力建设》
2011年第9期6-10,共5页
Electric Power Construction
基金
国家科技支撑计划项目(2009BAA16B00)
黑龙江省杰出青年科学基金资助项目(JC200912)
关键词
直接空冷
风机桥架
模态分析
谐响应分析
振动特性
direct air cooling
fan bridge
modal analysis
harmonic response analysis
vibration characteristic
