【摘要】 由于现场环境的复杂性以及斜拉索自身的特性,很难由频谱图直接得出索体的基本频率。在直接频差法的基础上,运用最小二乘法原理,介绍了一种求拉索基频的间接方法(简称"间接频差法"),并应用于凤台淮河大桥的索力测试中,与1993,1999和2004年实测值进行对比,证明了这种方法的有效性。更多还原

【Abstract】 Owing to the complexity of environment and the character of cable itself,it is difficult to identify the fundamental frequency from spectrum.The paper proposes another method to identify the fundamental frequency,called indirect method using least-squares,based on direct frequency difference method.This method was used in force testing of Fengtai Huaihe River Bridge.The test result proved that this method was effective compared with the measured value of year 1993,1999,2004.更多还原