摘要
对于铁路桥梁,机车通过时,车道不平顺及驱动轮重量的不平衡产生的荷载效应是一种移动的简谐力。在移动荷载作用下桥梁运动方程的基础上,利用大型有限元软件ANSYS,考虑移动荷载质量、速度和桥梁高阶固有频率的影响,对匀速移动简谐力作用下简支梁动态响应进行了研究。结果表明:最大动挠度都发生在跨中位置附近,跨中节点位移与简谐力的频率有关。
For railway bridges,the load effect of irregularity lane and wheel weight imbalances is a moving harmonic force.The dynamic responses of simply supported beams with uniform moving loads are studied based on the kinematics equations and by taking the mass and speed of the moving object and the high order natural frequencies of the beam into consideration.
出处
《低温建筑技术》
2010年第10期54-56,共3页
Low Temperature Architecture Technology
