噪声与振动控制2019，Vol.39Issue(1)：140-145,6.DOI:10.3969/j.issn.1006-1355.2019.01.027
有砟轨道动力性能分析的频域方法
A Frequency Domain Approach for Dynamic Performance Analysis of Ballasted Track
摘要
Abstract
A triple-layer continuously supported ballasted track model is built, and the kinematic equations of the rail, sleeper and ballast are derived. The steady-state responses of the model under harmonic excitation are obtained in the frequency domain. Then, the wheel/rail interaction model in the frequency domain is introduced, and the wheel/rail force is solved based on the dynamic flexibility method. The dynamic performance of the ballasted track induced by track irregularities is solved in frequency domain based on MATLAB programming. In the case study, the indexes of wheel/rail force, force transmissibility, track components vibrations are employed to assess the effects of vibration reduction measures such as adding elastic fasteners, laying soft baseplate under the sleepers, using composite sleepers, ballast mats and their combinations. Results show that the vibration reduction measures can change the ballasted track's natural frequency and cause the complex variation of these indexes in different frequency ranges. Compared to the measure of adding elastic fasteners, the soft baseplate under the sleepers and the ballast mats have a better comprehensive effect, while the composite sleepers have limited vibration reduction effect.关键词
振动与波/有砟轨道/动力性能/频域/减振Key words
vibration and wave/ballasted track/dynamic performance/frequency domain/vibration reduction分类
交通工程引用本文复制引用
韩锋,顾颖,古松,赵宇,张迅..有砟轨道动力性能分析的频域方法[J].噪声与振动控制,2019,39(1):140-145,6.基金项目
国家自然科学基金资助项目(51778534) （51778534）
北京市科技计划课题资助项目(Z171100002117001) （Z171100002117001）
