摘要
以JQ120架桥机为研究对象,针对架设边梁时的偏心动载荷所引起架桥机结构的弯扭耦合振动问题,基于瞬态动力分析理论,建立了架桥机主梁结构瞬态振动模型,用模态叠加法对其进行了结构动力响应分析,得到了该架桥机结构设计中应采用的动载系数(k=1.2)。该结论也可作为其他架桥机设计时的参考。
The JQ120 bridge-craft is taken as research object in this paper. To the bend-twist coupling vibration of the bridge-craft structure caused by eccentric dynamic load when the boundary beam is erected,the transient vibration model is established based on the transient dynamic analysis theory. The dynamic response of the structure is obtained by the model superposition. The dynamic load coefficient can be drawn from the analysis for structure design of the bridge-craft. The result can also be used as a reference for designning other bridge-crafts. 2 tabs, 8 figs, 6 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第4期80-83,共4页
Journal of Chang’an University(Natural Science Edition)
关键词
机械工程
架桥机
主梁
瞬态动力学分析
动载系数
mechanical engineering
bridge-craft
main beam
transient dynamic analysis
dynamic load coefficient
