移动荷载作用下Kerr地基梁稳态响应解答

Steady-state Response Solution of a Kerr Foundation Beam under Moving Loads

摘要:

研究Kerr地基上的均质Euler-Bernoulli梁在移动集中荷载作用下的稳态响应,分析有无阻尼存在时列车速度、地基压缩刚度、剪切刚度对Kerr地基梁挠度曲线的影响。计算结果表明,地基阻尼的存在能明显减少移动荷载引起的地基梁挠度,地基梁的挠度受地基压缩刚度的影响比剪切刚度更为明显。

Abstract:

The steady-state response of an Euler-Bernoulli beam placed on a Kerr foundation and subjected to a concentrated load moving with a constant speed has been investigated.A steadystate response solution of the Kerr foundation beam was derived and the influence of train velocity, compression stiffness,and shear stiffness of the foundation beam on the dynamic response were analyzed considering possible foundation damping.The results illustrated that foundation damping can significantly reduce deflection of a foundation beam,and compression stiffness has more effect on deflection than the shear stiffness.