[1]陈强,杨国来,王晓锋,等.变速移动载荷作用下梁的动态响应数值模拟[J].南京理工大学学报(自然科学版),2011,(02):204-208.
 CHEN Qiang,YANG Guo-lai,WANG Xiao-feng,et al.Numerical Analysis for Dynamic Responses of Beams Subjected to Moving Loads with Non-uniform Motion[J].Journal of Nanjing University of Science and Technology,2011,(02):204-208.
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变速移动载荷作用下梁的动态响应数值模拟
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
期数:
2011年02期
页码:
204-208
栏目:
出版日期:
2011-04-30

文章信息/Info

Title:
Numerical Analysis for Dynamic Responses of Beams Subjected to Moving Loads with Non-uniform Motion
作者:
陈强杨国来王晓锋葛建立
南京理工大学机械工程学院,江苏南京210094
Author(s):
CHEN QiangYANG Guo-laiWANG Xiao-fengGE Jian-li
School of Mechanical Engineering,NUST,Nanjing 210094,China
关键词:
动态响应 有限元法 振型叠加 移动质量 变速运动 惯性影响
Keywords:
dynamic responses finite element methods modal superposition moving masses non-uniform motions inertia effect
分类号:
O327
摘要:
分析具有大速度、加速度或大质量的移动载荷作用下支撑梁的动力响应问题,采用有限元法和振型叠加法相结合的建模方法,推导出关于模态坐标的时变系数常微分方程组,并通过Newmark-β算法求解数值解。与文献算例和ABAQUS模型的结果对比验证了该文方法与现有方法的一致性。通过分析匀速、匀加速、匀减速3种典型运动状态移动载荷作用下的支撑梁响应情况可知,在移动载荷具有大速度、大加速度或大质量时,研究梁的动力响应问题均需考虑移动载荷惯性影响。
Abstract:
To analyze the dynamic responses of supporting beams subjected to moving loads with large velocities,large accelerations or large mass,a modeling method combining the finite element method with the modal superposition method is derived.A system of ordinary differential equations about modes coordinates is deducted,which has time-varying coefficients and can be solved by applying Newmark-β algorithm.The method is proved equivalent to the present methods by comparing references and the ABAQUS model.Through analyzing dynamic responses of supporting beams subjected to moving loads with three motion styles(uniform,accelerated and decelerated),this paper concludes that the moving loads’ inertia effect is significant when a moving load has large mass,large velocity or large acceleration.

参考文献/References:

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[2] Bierer T,Bode C. A semi-analytical model in time domain for moving loads[J]. Soil Dynamics and Earthquake Engineering, 2007, 27: 1073 - 1081.
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[5] Lee H P. Dynamic response of a beam with a moving mass[J]. Journal of Sound and Vibration,1996,192 ( 2) : 178 - 183.
[6] Rieker J R,Trethewey M W. Finite Element analysis of an elastic beam structure subjected to a moving distributed mass train[J]. Mechanical Systems and Signal Processing, 1999, 13( 1) : 31 - 51.
[7] 汪小超,蒲军平. 变截面桥梁在变速移动荷载作用 下的动力响应[J]. 科技通报,2009,25 ( 2 ) : 147 - 152.
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备注/Memo

备注/Memo:
基金项目:国防“973”课题( 61311603) 作者简介:陈强( 1987 - ) ,男,博士生,主要研究方向: 现代设计方法与技术,E-mail: miller5772@ sina. com; 通讯作 者: 杨国来( 1968 - ) ,男,博士,教授,博士生导师,主要研究方向: 武器虚拟样机技术,E-mail: yyanggl@ mail. njust. edu. cn。
更新日期/Last Update: 2012-04-30