摘要
对受变速移动荷载作用的简支梁的动力响应分析过程中,同时考虑移动质量的牵连惯性力及其加速度对梁横向振动的影响。利用时变力学系统的求解方法,得到在移动质量的初速度和加速度两个运动参数变化情况下,梁的挠度变化规律。数值结果表明,移动质量的加速度对梁横向振动的影响不能忽略,否则将产生较大的误差,而它的牵连惯性力对梁的横向振动影响不大,在一般的计算中可以忽略其影响以简化运算。
The dynamic response of a simply supported beam subjected to a moving load with variable speeds is quantified by considering both influences of the inertia force of moving mass and its acceleration on lateral vibration. The principle variation of beam deflection is calculated with two variable parameters： the initial speed and the acceleration of moving mass, using the solution method of time-variant mechanical system. Results show that the influence of acceleration on lateral vibration can not be ignored. However, its inertia force has little influence on the lateral vibration, which can be ignored to simplify the calculation under certain conditions.
出处
《工程力学》
EI
CSCD
北大核心
2006年第6期25-29,共5页
Engineering Mechanics
基金
湖南大学SIT项目(12-1)
关键词
时变力学系统
耦合振动
简支梁
移动质量
初速度
加速度
time-variant mechanical system
couple vibration
simply supported beam
moving mass
initial speed
acceleration
