考虑边界条件的频率法测索力实用公式

通过两端固结梁和两端铰接梁的频率特征方程,在找出了二者的频率关系后,建立了一个形式简单、物理意义明确的索力计算公式.和同类方法的对比分析结果表明,该公式具有更好的计算精度和适用范围,使用该公式可以快速、准确地识别出不同长细比、抗弯刚度拉索的索力.分析了拉索边界条件对索力计算结果的影响,提出了考虑拉索端部转动约束刚度的索力计算公式.

Practical Formula for the Estimation of Cable Tension in Frequency Method Considering the Effects of Boundary Conditions

From the frequency characteristic equation of a beam fixed and hinged at both ends,the frequency relationship between the two states was discovered,and a simple practical formula in the estimation of cable tension was proposed,which has definite physical meanings.The results from case studies have demonstrated that the formula can simulate the tension condition precisely for cables,so it can be used to identify the tension of cables with different slenderness ratios and flexural stiffness more easily and accurately.The influence of different cable boundary conditions on the cable tension calculation results was analyzed,and a cable tension formula which can take into account the rotational stiffness of the cable ends was proposed.