三层结构模型的内共振和组合共振  

Internal and combinational resonances of a three-story structure

作　　者：吴志强[1] 陈世栋[1,2] 雷娜[1,2] 宫明旭 

机构地区：[1]天津大学机械工程学院力学系,天津300072 [2]北汽福田汽车股份有限公司工程研究总院,北京102206

出　　处：《振动与冲击》2014年第8期1-3,10,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金(11172198);教育部博士点基金(2009003211005);教育部新世纪优秀人才支持计划(NCET-15-0247)

摘　　要：主要对三层结构模型的内共振和组合共振实验进行了研究。通过模态设计使得结构一、二阶模态频率之比接近1:3。经振动台水平基础激励实验发现:以一阶模态频率、二阶模态频率激励,都可激发出一、二阶模态间的内共振行为,同时该结构中还存在多种组合共振行为。为下一步非线性振动实验装置的改进奠定了基础。Experiments for internal and combinational resonances of a three-story structure were investigated.The frequency ratio between the first and the second modes of the structure was set near 1∶3 with a modal design.The internal resonance behaviors were found when the excitation frequency was close to the first modal frequency or the second one. Meanwhile,several types of combinational resonances were found in this structure.These results laid a foundation for future modification of a nonlinear vibration equipment.

关 键 词：三层结构 内共振 组合共振 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3