系杆拱的近似基频公式

Approximate method for calculating the fundamental frequency of arch bridges with longitudinal tension girders

按能量法原理推导建立了系杆拱基频的近似计算公式．与有限元计算结果相比，本文导出的近似公式具有工程设计所需的足够精度．

By using the energy method. an approximate method for calculating the frequencyof arch bridges with longitudinal tension girders was presented. Comparison with results given by the finite element method shows the proposed approximate method has enough accuracy for practical purposes.