摘要
根据振动理论给出微风振动钢管构件的起振临界风速Vcr和共振力的简明计算方法,分析了共振产生的弯曲和疲劳应力对易发生微风振动的杆塔斜材和辅材结构安全性的影响。结果表明,共振弯曲应力一般不会造成构件弯曲破坏,但高频振动可能导致结构疲劳破坏,尤其是杆端约束接近于固接的构件。
Based on the vibration theory,simplified formulas calculate the critical wind speed(Ver) causing resonance vibration of the tubular member and the vibration force.Effects of bending and tatigue stresses of the resonance on structure safety are analyzed.The results indicate that the bending stress do not destroy the tubular member in most of the cases.The tatigue stress may destroy the member,especially,the regid-rigid member.In addition,some measurements of repressing breeze vibration are presented in this paper.
出处
《振动．测试与诊断》
EI
CSCD
2007年第3期208-211,共4页
Journal of Vibration,Measurement & Diagnosis
基金
"十一五"国家科技支撑计划重大资助项目(编号:2006BAA02A08)
关键词
钢管塔
微风振动
临界风速
共振
长细比
transmission steel tubular tower breeze vibration critical wind speed resonant vibration slenderness ratio
