水力发电2017，Vol.43Issue(11)：32-35,4.
基于LR模糊数的水电机组竖向振动传递路径分析
Analysis on Vertical Vibration Transmission Path of Hydrogenerator Set Based on L-R Fuzzy Numbers
摘要
Abstract
In order to analyze the influence of complex disturbance of actual vibration in hydropower station on structural vibration transmission characteristics,a vibration model of umbrella-type Francis hydrogenerator set is established,and the fuzziness of mass,damping and stiffness are introduced into the model.The computational expressions for vibration path transmissibility based on L-R fuzzy numbers are derived by using interval algorithms of fuzzy variables and random perturbation theory.According to the α level cut sets of fuzzy numbers,the proposed method can determine the numerical boundaries of transmissibility of each path under fuzzy variables,and evaluate the contribution of paths.Based on the analysis on powerhouse structural vibration,the influences of fuzzy variables on vibration path transmissibility and its numerical boundaries are clarified and the rationality and feasibility of model and method are also verified.The method can provide theoretical basis and data supporting for a comprehensive analysis of hydrogenerator set vibration characteristics.关键词
振动传导路径/传递度/模糊性/区间参数/水电机组Key words
vibration transmission path/transmissibility/fuzziness/interval parameter/hydrogenerator set分类
信息技术与安全科学引用本文复制引用
职保平,秦净净,许新勇,张宏战..基于LR模糊数的水电机组竖向振动传递路径分析[J].水力发电,2017,43(11):32-35,4.基金项目
国家自然科学基金资助项目(51709125,51379030,U1404529) （51709125,51379030,U1404529）
河南省基础与前沿技术研究资助(162300410053) （162300410053）
河南省高等学校重点科研项目资助计划(17A570006,18B570006) （17A570006,18B570006）
开封市科技计划项目(1503037,1603114) （1503037,1603114）
