摘要
阐述了自由约束梁在弯曲振动时,一阶振型在工程应用中的理论以及相关振动参数的计算问题。以管道为例,利用构件弯曲共振疲劳试验的加载方法,建立了两端集中质量的计算处理模型,给出了共振频率、节点位置、应变(应力)、输入功率、最大激振力等振动参数的计算方法,介绍了一种新的激振器设计原理,设计、制造出一种试验装置并完成相关试验。试验结果表明,该计算方法正确可行,试验装置结构设计合理。
In this paper,the theory and relative vibration parameters of bending vibration of free restrained beam in engineering application are introduced.Taking the pipeline as an example,the loading method for bending resonant fatigue test is discussed.The calculation model of the lumped mass is established,and the calculation method for vibration parameters are given,such as resonant frequency,node position,strain(stress),input power and maximum exciting force.The design principle of a new exciter is introduced and a test device is designed.The test results show that the calculation method is feasible and the structure design of the test device is reasonable.
作者
张学成
刘学飞
李文权
Zhang Xuecheng;Liu Xuefei;Li Wenquan(School of Mechanical Science and Engineering, Jilin University, Changchun 130000, Jilin, China)
出处
《工程与试验》
2018年第4期81-86,共6页
Engineering and Test
关键词
弯曲共振
疲劳试验
振动参数
工程计算
bending resonance
fatigue test
vibration parameter
engineering calculation
