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建立轨道结构三层弹性梁模型,考虑轨道不平顺对振动响应的影响,利用傅立叶变换法求解振动位移.通过计算我国现有几种高速动车组运行时引发轨道结构的振动位移响应,得到轨道结构的振动加速度,分析了轨道不平顺及列车速度对振动幅值的影响.研究表明,较差的轨道不平顺状态及列车高速运行的组合情况下,轨道振动响应幅值将迅速增大.
The three-layer elastic beam model of orbital structure is established, and the influence of orbital irregularity on the vibration response is considered, and the vibration displacement is solved by using the Fourier transform method.Through calculating the vibrational displacement response of orbital structure caused by the existing high-speed EMU in operation, The impact of track irregularity and train speed on the vibration amplitude is analyzed.The results show that under the combination of poor track irregularities and high speed train operation, the amplitude of orbit vibration response will increase rapidly.