鋼軌減振器對(duì)高鐵軌道結(jié)構(gòu)動(dòng)力學(xué)特性的影響研究(英文)
[Abstract]:Objective: To study the design parameters of the rail shock absorber for the typical high-speed rail structure, and to further reveal the working mechanism of the steel rail shock absorber and provide the scientific basis for the rational design and application. Innovation point: The parameters of the rail shock absorber are studied from the aspects of the dispersion characteristics, the resonance characteristics, the vibration attenuation characteristics and the vibration energy (approximate acoustic radiation ability) of the track structure by using the analysis method of the dynamic characteristics of the infinite long period structure based on the Fourier transform. The influence of load movement on the rate of vibration attenuation is put forward. Methods: The influence of the design parameters of the rail vibration damper on the dynamic characteristics of the rail structure was studied by using the analysis method of the dynamic characteristics of the infinite long period structure based on the Fourier transform. The dynamic characteristics of the study include the dispersion characteristics, the resonance characteristics, the vibration attenuation characteristics and the vibration energy (approximate acoustic radiation ability). Conclusion:1. The addition of a rail shock absorber introduces a new stop band, thereby increasing the width of the entire stop band;2. In the case of moving and non-moving, the vibration damping rate of the load is different; the high-speed movement of the load will reduce the vibration attenuation rate;3. The design frequency of the steel rail shock absorber should be close to the Pinned-Pinned frequency of the original track structure, and the better the quality is, the design frequency of the rail damper should be close to the Pinned-Pinned frequency of the original track structure. The frequency of the rail shock absorber can be designed to be lower than the Pinned-Pinned frequency if sufficiently high damping is guaranteed.
【作者單位】: State
【基金】:Project supported by the National Natural Science Foundation of China(Nos.U1434201 and 51475390) the Foundation of China Railway(No.2015Z003-B) the Scientific Research Foundation of State Key Laboratory of Traction Power(Nos.2015TPL_T08 and 2017TPL_T01),China
【分類號(hào)】:TB535.1;U213.21
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