摘要
以某橡胶减震器为研究对象,ASTM_5992_R2006为依据,采用Bose ElectroForce 3330振动台分别将橡胶减震器的振动频率、振幅、预载荷3个水平因素作为可变参数,进行循环振动试验,并用DMA模块记录力-位移信号获得约3万个数据。利用傅里叶变换对试验数据进行处理,获得了振动频率、激励振幅、预载荷与橡胶减震器动刚度的主要关系。结果表明,不同的预载荷情况下的动刚度曲线成近似的平行关系。预载荷越大,橡胶减震器承载能力越强,动刚度越大。动刚度随频率增大先增大后减小,0-30 Hz,动刚度随频率的增大而增大,增大幅度达到30%;35~50 Hz,动刚度变化相对较小。动刚度值的整体幅度随激励振幅增大而减小。通过对减振器的试验,更加具体地了解了动刚度的影响因素,为橡胶减震器的国产化提供了设计及检验的参考依据。
To research the dynamic stiffness and the influence factors of dynamic stiffness characteristics of a helicopter rubber shock absorber and based on ASTM_5992_R2006,the paper took a rubber shock absorber as research object, and used Bose ElectroForce 3330 as vibration table,vibration frequency,amplitude and pre-load as three levels of factors of variable parameters,to complete vibration experiment. About 30 000 data were obtained. Force-displacement signals were recorded by the DMA module. Using Fourier transform,the paper analyzed these test data. The main relationships about vibration frequency,amplitude,pre-load and dynamic stiffness of the rubber shock absorber were obtained.
出处
《实验室研究与探索》
CAS
北大核心
2014年第3期41-44,共4页
Research and Exploration In Laboratory
关键词
振动
动刚度
橡胶减震器
vibration
dynamic stiffness
rubber-shock-absorber
