摘要
忽略拱的轴向变形 ,选取满足边界条件和对称性的近似振型函数 ,运用能量法导出单孔圆弧拱对称挠曲振动基频的实用计算公式 .与有限元结果比较 ,矢跨比f/l≥ 0 2时吻合较好 .
Based on the approximate vibration functions,which meet with the boundary conditions and symmetry of deflection vibration of arch,the simplified equations for calculating the lowest symmetrical vibration natunal frequency are derived by enengy method.When f/l ≥0 2,the frequency results from the simplified method are nearly the same as from finite element method.
出处
《重庆交通学院学报》
2000年第1期29-30,37,共3页
Journal of Chongqing Jiaotong University
关键词
圆弧拱
对称挠曲
振型
基频
拱结构
arch
symmetrical deflection vibration
vibration function and frequency
