基于LR模糊数的水电机组竖向振动传递路径分析

发布时间：2018-03-06 13:11

本文选题：振动传导路径　切入点：传递度　出处：《水力发电》2017年11期 　论文类型：期刊论文

【摘要】：为分析水电站实际振动的复杂扰动对结构振动传导特性的影响,在建立完善的伞式混流式水轮发电机组振动模型的基础上,引入质量、阻尼、刚度等参数的模糊性,利用模糊变量的区间运算法则、随机摄动理论,推导了基于LR模糊数的振动路径传递率的计算方法,该方法可根据模糊数的α水平截集,确定各路径在多模糊变量作用下的传导率取值边界,最终评价各路径贡献度。通过水电机组厂房结构振动分析,明确了模糊变量对传导率及其取值边界的影响,验证了模型和方法的合理性与可行性,并为全面分析水电机组振动特性提供理论和数据支撑。
[Abstract]:In order to analyze the influence of the complex vibration disturbance of hydropower station on the vibration conduction characteristics of the structure, the fuzziness of the parameters such as mass, damping and stiffness is introduced on the basis of the perfect vibration model of the umbrella Francis turbine generator set. Based on the interval algorithm of fuzzy variables and the random perturbation theory, the method of calculating the path transfer rate of vibration based on LR fuzzy number is derived. The method can be based on the 伪 level cut set of fuzzy number. The value boundary of the conductivity of each path under the action of multiple fuzzy variables is determined, and the contribution of each path is finally evaluated. The influence of the fuzzy variable on the conductivity and its value boundary is clarified through the vibration analysis of the powerhouse structure of the hydropower unit. The rationality and feasibility of the model and method are verified, and the theoretical and data support is provided for the comprehensive analysis of the vibration characteristics of hydropower units.
【作者单位】：小流域水利河南省高校工程技术研究中心;黄河水利职业技术学院;华北水利水电大学;大连理工大学建设工程学部;
【基金】：国家自然科学基金资助项目(51709125,51379030,U1404529) 河南省基础与前沿技术研究资助(162300410053) 河南省高等学校重点科研项目资助计划(17A570006,18B570006) 开封市科技计划项目(1503037,1603114)
【分类号】：TV734

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