【摘要】 将广义变分原理应用于桥上无缝线路附加力的计算中,基于已有的试验及计算结果,先假设钢轨伸缩附加力函数,由此得到钢轨位移及梁轨相对位移函数。通过结构的边界和变形协调条件并运用广义变分法,再计算梁轨体系各部分的能量。建立结构体系的平衡方程,采用相应的软件编制计算程序,计算结果符合工程实际。更多还原

【Abstract】 The generalized variational principle is applied to the calculation of the additional expansion and contraction forces of CWR on bridge. Based on previous experiments and calculating results, the functions of the additional expansion and contraction forces on rails are supposed at first. From this, the functions of the rail displacement and the relative displacement between beams and rails are derived. On the basis of the boundary conditions of the structure and compatibility conditions of deformation, combined with the generalized variational principle, each part of energy of beams and rails structure are calculated. Then the equilibrium equations are derived. A program is coded using relevent software. The results conform to the engineering practical.更多还原