三峡大学学报（自然科学版）2017，Vol.39Issue(5)：38-42,5.DOI:10.13393/j.cnki.issn.1672-948X.2017.05.008
影响水电站垫层蜗壳结构自振特性的若干因素分析
Analysis of Several Factors Affecting Natural Vibration Characteristics of Spiral Case with Cushion Layers of Hydropower Station
摘要
Abstract
The natural vibration characteristics of spiral case will cushion layers of a underground powerhouse of hydropower station are analyzed by using the ANSYSsoftware to study the effects of the plane laying scope of cushion layer,cushion layer aging performance,water quality and hydraulic pressure expansion.The results show that when the cushion layer is unaging,the cushion laying scope,water quality and hydraulic pressure expansion have no significant influence on the natural vibration frequency of spiral case structure.However,the formation of large gap due to cushion layer aging and considering the water quality in the flow channel obviously reduces the natural vibration frequency of the steel spiral case and the concrete structure;but the increase of stiffness of steel spiral case due to hydraulic pressure expansion increases the natural vibration frequency,which is favorable for the structure anti-vibration.Therefore,it is necessary to pay attention to the choice of the cushion material for spiral case to ensure that its mechanical properties do not change with time.关键词
水电站蜗壳/自振特性/水体质量/水压膨胀/垫层老化/垫层平面铺设范围Key words
spiral case of hydropower station/naturel vibration characteristics/water quality/hydraulic pressure expansion/cushion layer aging/cushion laying scope分类
建筑与水利引用本文复制引用
黄鹏,伍鹤皋,余晓华,刘静..影响水电站垫层蜗壳结构自振特性的若干因素分析[J].三峡大学学报（自然科学版）,2017,39(5):38-42,5.基金项目
国家自然科学基金资助项目(51679175) （51679175）
