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斜拉桥的动力分析是桥梁计算的重要课题之一。本文仅探讨了斜拉桥侧向自振频率的计算。为了使拉索及塔架和梁一样也按平面问题处理,我们提出索对单元的新概念及模拟塔架的近似处理。对公路、铁路上两个实例计算了它们的自振频率。在计算中除用通常的迭代法之外,并用刚度矩阵的三对角化及二分法校核了频率。所有计算均在DJS-6型电子计算机上进行。
Dynamic analysis of cable-stayed bridges is one of the most important topics in bridge calculation. This paper only discusses the calculation of lateral natural frequencies of cable-stayed bridges. In order to make the cable and tower and beam the same as the plane problem, we propose a new concept of cable-to-cable unit and the approximate treatment of the simulated tower. On the highway, railway two examples calculated their natural frequency. In addition to the usual iterative method used in the calculations, the frequency was checked using tridiagonalization and dichotomy of the stiffness matrix. All calculations are performed on the DJS-6 electronic computer.