钢轨减振器对高铁轨道结构动力学特性的影响研究（英文）

发布时间：2019-03-04 16:43

【摘要】：目的:针对典型高铁轨道结构,对钢轨减振器的设计参数进行研究,进一步揭示钢轨减振器的工作机理,为合理设计和应用提供科学依据。创新点:运用基于傅里叶变换的无限长周期结构动态特性的分析方法,从轨道结构的频散特性、共振特性、振动衰减特性和振动能量(近似声辐射能力)等多个方面对钢轨减振器的参数进行研究;提出荷载移动对振动衰减率的影响问题。方法:运用基于傅里叶变换的无限长周期结构动态特性的分析方法,结合典型高铁轨道结构,对钢轨减振器的设计参数对轨道结构动力学特性的影响进行研究。研究的动力学特性包括:频散特性、共振特性、振动衰减特性和振动能量(近似声辐射能力)。结论:1.加装钢轨减振器会引入新的阻带,从而增加整个阻带的宽度;2.在移动和不移动的情况下,荷载的振动衰减率是不同的;荷载的高速移动会降低振动衰减率;3.从阻带尽量宽、振动衰减率尽量大和振动能量尽量小这三方面的要求来看,钢轨减振器的设计频率应该接近原来轨道结构的Pinned-Pinned频率,并且质量越大越好;4.如果能够保证足够高的阻尼,钢轨减振器的频率可以设计得比Pinned-Pinned频率低。
[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.
【作者单位】： 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
【分类号】：TB535.1;U213.21

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