CAJ | 학술논문

本文提出计算整备状态下高速列车车体垂向一阶弯曲模态频率的数值及解析方法，研究并阐释车下设备对整备状态下车体模态频率的影响机理。基于解析方法及隔振理论，提出车下设备与车体模态匹配原则，设计车下设备悬挂参数，并针对设计结果进行试验验证。结果表明，数值方法计算精度高，但不便于工程运用，而解析方法在保证计算精度的同时，能够直接运用于车下设备悬挂设计；相对于刚性吊挂而言，车下设备采用弹性吊挂时，整备状态车体的垂向一阶弯曲模态频率会得到明显提升；车体与车下设备模态频率的合理匹配可有效避免二者间共振的发生，针对所研究的高速车辆，当独立设备固有频率设计为6.5Hz时，设备自振频率能够与车体垂向一阶弯曲模态频率有效分开。在整个运行速度区间内，车辆可以获得良好的运行平稳性，同时车下设备振动亦不剧烈。
본문제출계산정비상태하고속열차차체수향일계만곡모태빈솔적수치급해석방법，연구병천석차하설비대정비상태하차체모태빈솔적영향궤리。기우해석방법급격진이론，제출차하설비여차체모태필배원칙，설계차하설비현괘삼수，병침대설계결과진행시험험증。결과표명，수치방법계산정도고，단불편우공정운용，이해석방법재보증계산정도적동시，능구직접운용우차하설비현괘설계；상대우강성조괘이언，차하설비채용탄성조괘시，정비상태차체적수향일계만곡모태빈솔회득도명현제승；차체여차하설비모태빈솔적합리필배가유효피면이자간공진적발생，침대소연구적고속차량，당독립설비고유빈솔설계위6.5Hz시，설비자진빈솔능구여차체수향일계만곡모태빈솔유효분개。재정개운행속도구간내，차량가이획득량호적운행평은성，동시차하설비진동역불극렬。
The numerical method and the analytic method for calculating the first vertical bending frequency of a fully equipped high-speed railway vehicle were proposed respectively ,and the influencing mechanism of suspen-ded equipment on car body modal frequencies was studied .The principles of modal matching between suspen-ded equipment and car body were presented according to the analytic method and the vibration isolation theory , and the suspended parameters of equipment were designed and also verified by in-situ experiments .Results show as follows :The numerical method has higher computational accuracy but is not convenient for engineering application w hereas the analytic method can obtain high computational accuracy and also can be directly used in design of suspended equipment ;compared with fixed equipment ,the first vertical bending frequency of the full-y equipped car body can be observably promoted with suspended equipment ;reasonable matching of modal fre-quencies between suspended equipment and car body can effectively avoid occurring of resonant vibrations be-tween them ;referring to the research object of high-speed railway vehicles ,when the natural frequency of the independent suspended equipment is designed at 6 .5 Hz ,the modal frequency of the equipment can be effective-ly separated from the first vertical bending frequency of car body ,and in the entire running speed range ,the ve-hicle can obtain good ride quality and the suspended equipment vibrations are not severe .