秦沈客运专线高速列车构架蛇行波标准差的试验研究

国内外大多采用轨道横向不平顺作为列车—桥梁(轨道)时变系统横向振动的激振源。实际上，引起此系统横向振动的因素很多，诸如轨道横向不平顺、车轮踏面锥度、轮轨缺陷、车轮与钢轨的制造误差、车辆质量及其载重的偏心等。仅仅考虑轨道横向不平顺，会忽略其他很多因素的影响。相反，机车车辆构架蛇行波反映了引起此系统横向振动所有因素的影响，同时还反映了轮轨实际接触状态。研究证明，构架蛇行波标准差是输入此系统横向振动的能量，因此，有关它的研究十分重要。本文根据秦沈客运专线高速列车(中华之星)构架蛇行波现场测试结果，采用工程概率数值分析方法，对高速列车构架蛇行波标准差进行了统计分析，得出具有99％概率水平的高速列车构架蛇行波标准差与车速的关系曲线，为高速列车—桥梁(轨道)时变系统横向振动随机分析激振源的确定提供了基础资料；同时还列出了具有代表性的高速列车构架蛇行波实测波形图。

A Test Research on Mean Square Deviation of Hunting Wave of Bogie Frame of High-speed Train Running on the Qing-shen Passenger Railway Line

The transverse track irregularity is mostly treated as the exciting source of transverse vibration of train-bridge (or track) time-varying system at home and abroad. In fact, transverse vibration of the system may be caused by many factors, such as the transverse track irregularity, the conicity of wheel tread, defects of wheels and rails, errors in production of wheels and rails, the eccentricity of the mass and loading of cars etc. Sole consideration of the track irregularity results in negligence of many other factors unable to be included in the track irregularity. On the contrary, the hunting wave of car bogie frame covers the influence of all factors causing transverse vibration of the system and reflects the action of different wheel-rail contact conditions. It has been verified that the standard deviation of hunting wave of car bogie frame, which is very important to the transverse vibration analysis of the system, is the energy input into the system. In this paper, the mean square deviation of hunting wave of bogie frame of high-speed train was calculated statistically using a numerical method of engineering probability analysis, and on the basis of field-test results of the hunting wave of bogie frame of high-speed train (China star) running on the Qing-shen passenger railway line. The relationship curve between the mean square deviation with 99% probability of the hunting wave of bogie frame of high-speed train and speed was then obtained. All of these are the basic data for determining the exciting source of random transverse vibration of high-speed train and bridge (track) time-variant system. Meanwhile, the typical field-test time-history curves of hunting wave of bogie frame of high-speed train are listed.