考虑施扰山体影响的耐张型悬索支撑输电结构风振疲劳损伤分析  

Wind-induced fatigue damage analysis of the tension suspension-braced transmission structure considering the effect of occluding hills

作　　者：李正良[1,2] 王邦杰 王涛 LI Zhengiang;WANG Bangjie;WANG Tao(School of Civil Engineering,Chongqing University,Chongqing 400045,China;Chongqing Key Laboratory of Wind Engineering and Wind Resources Utilization,Chongqing University,Chongqing 400045,China;School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150090,China;Chongqing Research Institute of Harbin Institute of Technology,Chongqing 401151,China)

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学风工程及风资源利用重庆市重点实验室,重庆400045 [3]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090 [4]哈尔滨工业大学重庆研究院,重庆401151

出　　处：《振动工程学报》2025年第2期279-291,共13页Journal of Vibration Engineering

基　　金：重庆市博士后研究项目特别资助项目(2022CQBSHBT3009);国家电网有限公司科技项目(5200-202156071A-0-0-00);哈尔滨工业大学重庆研究院博士后特别支持计划资助项目(KY506023002)。

摘　　要：由于受扰山体风场会受到附近其他山体的影响,处于受扰山体风场中的耐张型悬索支撑输电结构风振疲劳损伤需要考虑施扰山体的影响。为了分析施扰山体对耐张型悬索支撑输电结构风振疲劳损伤的影响,本文进行了复杂山地风场特性风洞试验,讨论了受扰山体风场平均风修正系数和脉动风修正系数随施扰山体坡度、高度和间距的变化规律,并提出了相应的分布模型;基于非线性有限元理论,建立了考虑施扰山体影响的耐张型悬索支撑输电结构风振非线性有限元模型;采用雨流计数法和Miner线性疲劳累积损伤准则进行疲劳损伤分析;通过本文提出的框架研究了施扰山体对某两跨耐张型悬索支撑输电结构风振疲劳损伤的影响。结果表明:随着施扰山体坡度的增大,耐张型悬索支撑输电结构各部位疲劳损伤呈先减小后增大的变化趋势;施扰山体高度对各部位疲劳损伤的影响较小,无明显变化规律;当施扰山体间距为0~600 m时,各部位疲劳损伤随着间距的增大而逐渐减小,当施扰山体间距为600~800 m时,各部位疲劳损伤随着间距的增大而陡然增大;在同一施扰山体影响下,支撑导线悬索和导线的端部疲劳损伤均较跨中更大。In complex hilly terrain,the wind field around interfered hills is influenced by nearby hills,which affects the wind-in-duced fatigue damage of the tension suspension-braced transmission structure.Therefore,the effect of occluding hills must be considered in the analysis of wind-induced fatigue.In order to analyze the influence of occluding hills on the wind-induced fatigue damage of the transmission structure in complex hilly terrain,wind tunnel tests on the wind filed characteristics of complex hilly terrain were first conducted.Based on the test results,the variation of the mean velocity correction factor and the fluctuating ve-locity correction factor of the wind field around interfered hills,with different slopes,heights and interval distances of occluding hills,were studied,and a corresponding distribution model was proposed.Next,a nonlinear finite element model for wind-in-duced vibration of the tension suspension-braced transmission structure considering the effect of occluding hills was established us-ing the nonlinear finite element method.Then the time domain rain-flow method and the Miner’s linear cumulative damage theo-ry were applied to estimate the wind-induced damage to the structure.Finally,a two-span tension suspension-braced transmission structure was selected as a case study,and considering the effect of occluding hills,the wind-induced fatigue damage was ana-lyzed using the proposed model.The results show that:the fatigue damage in each part increases initially and then decreases as the slope of the occluding hills increases.The heights of occluding hills have little effect on the fatigue damage of each part,with no obvious trend.When the interval distances between occluding hills is between 0 m and 600 m,the fatigue damage in each part gradually decreases as the distance increases.However,when the interval distance is between 600 m and 800 m,the fatigue damage of each part suddenly increases as the distance increases.Under the influence of the same occluding hill,the fatigue dam-age of the

关 键 词：悬索支撑输电结构 风振疲劳损伤 Miner线性疲劳累积损伤准则 复杂山地风场 施扰山体 

分 类 号：TU311.3[建筑科学—结构工程] O346.2[理学—固体力学]