摘要
基于黏弹性材料动态恢复力由非线性弹性恢复力和非线性阻尼力叠加而成的理论,提出钢轨扣件减振橡胶的动态力学模型.根据实际工作状态对减振橡胶进行动态试验,对试验数据进行拟合分析,并验证了拟合的有效性.分析研究了振幅和频率对非线性弹性恢复力、非线性阻尼力以及动态刚度的影响规律.结果表明:随着振幅的增加,弹性恢复力和迟滞阻尼力迅速增大,动刚度值也相应增大;随着激励频率增加,弹性恢复力略有减小,阻尼力有所增大,同时,动刚度也有增大的趋势.
Based on a hypothesis superposition theory of nonlinear elastic restoring force （NEF） and nonlinear damping force （NDF）, a non-linear dynamic mechanical model was proposed. The rubber absorber was tested according to its working condition, and the experimental data was analyzed. This model was verified. Amplitude and frequency dependence of NEF, NDF and the dynamic stiffness were studied. The results show that with the increase of the amplitude, the NEF and the NDF increase rapidly, and the dynamic stiffness increases too. With the increase of the frequency, the NEF decreases slightly, hut the NDF increases, the dynamic stiffness has an increasing trend too.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第2期208-212,共5页
Journal of Tongji University:Natural Science
基金
"十一五"国家科技支撑计划(2009BAG11B02)
关键词
钢轨扣件
刚度
振幅
频率
rail fastening
stiffness
amplitude
frequency
