摘要
在结构分析中,动力响应的分析对明确结构的振动特性研究具有十分重要的作用,但对振动控制而言,参数的敏感性是其核心问题之一。本文在计算各路径传导力及传导率均值和变化范围的基础上,引入各区间参数,同时结合区间算法、随机摄动理论,分析各参数对结构响应及传递率的影响,并给出排序。最终,以某伞式混流式水轮发电机组振动模型为例进行计算,明确了有效控制部件,验证了方法的合理性与可行性。结果表明该方法能够计算任意参数不确定性对结构响应及传导率的影响,为水电机组的振动控制分析提供了理论和数据支撑。
The analysis of dynamic response plays an important role in the study of vibration characteristics of structure, but for vibration control, the sensitivity of parameter is one of core problems. Firstly, the computational expressions for the range and means of conduction force and transmission are derived by using interval factor method and random perturbation theory, and then, the influence of parameters on structural response and transmissibility is analyzed and sorted. The rationality and feasibility of method are verified by a calculating example, which is defined the effective control components in vibration model of Umbrella mixed-flow turbine-generator set. The example results show that the proposed method can analyze the influence of any parameter＇s uncertainty on structural response or transmissibility, which will provide theoretical basis and data support for vibration control of hydropower unit.
作者
职保平
李正星
秦净净
于洋
ZHI Baoping1,2, LI Zhengxing3, QIN Jingjing2, YU Yang2(1. Yellow River Conservancy Technical Institute, Kaifeng 475004, Henan, China; 2. University Engineering Technology Research Center of Small Watershed Conservancy of Henan Province, Kaifeng 475004, Henan, China; 3. Yi Jiang Construction Branch, State Power Investment Group Yunnan International Power Investment Co., Ltd., Tengchong 679100, Yunnan, China)
出处
《水力发电》
北大核心
2018年第9期55-58,80,共5页
Water Power
基金
国家自然科学基金(51709125)
河南省高等学校重点科研项目(17A570006
18B570006)
开封市科技计划项目(1603114
1703003)
关键词
敏感性
区间参数
随机参数结构
传导路径
水电站
sensitivity
interval parameter
random parameter structure
transfer path
hydropower station
