Dynamic response of a beam on a Pasternak foundation and under a moving load

被引：7
作者：
曹长勇
机构：
[1] SchoolofCivilandHydraulicEngineering,DalianUniversityofTechnology
来源：
JournalofChongqingUniversity(EnglishEdition) | 2008年 / 7卷 / 04期
关键词：
dynamic response; beam; Pasternak foundation; moving load; complex anysis;
D O I：
暂无
中图分类号：
U211 [线路理论]; U416.1 [路基工程];
学科分类号：
0814 ; 082301 ; 081401 ;
摘要：
The dynamic response of an infinite beam placed on a Pasternak foundation when the system was subjected to a moving load was investigated.We used the double Fourier transform and its inversion to solve the formulations of the problem.A closed form analytic solution of the beam was obtained by the theorem of residues.We selected a numerical example to illustrate the dynamic response of the beam on Pasternak and Winkler foundations,respectively.We discuss the effect of the moving load velocity on the dynamic displacement response of the beam.The maximum deflection of the beam increases slightly with increased load velocity but increases significantly with reduced shear modulus of subgrade at a given velocity.The maximum deflection of a beam resting on a Pasternak foundation is much smaller than that of a beam on a Winkler foundation.
引用
收藏
页码：311 / 316
页数：6
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