CAJ | 학술논문

将虚拟激励法和车辆-有砟（无砟）轨道-路基-地基耦合系统垂向振动解析模型有效结合起来，由轨道不平顺功率谱直接得到准确的列车随机激振荷载功率谱，然后采用频率采样三角级数法反演出列车随机激振荷载时程。为铁路环境振动中列车随机激振荷载的计算提供了一简便有效的方法。算例比较了有砟轨道和无砟轨道两种情况下CRH3高速列车运行引起的列车随机激振荷载功率谱密度与时程曲线。
장허의격려법화차량-유사（무사）궤도-로기-지기우합계통수향진동해석모형유효결합기래，유궤도불평순공솔보직접득도준학적열차수궤격진하재공솔보，연후채용빈솔채양삼각급수법반연출열차수궤격진하재시정。위철로배경진동중열차수궤격진하재적계산제공료일간편유효적방법。산례비교료유사궤도화무사궤도량충정황하CRH3고속열차운행인기적열차수궤격진하재공솔보밀도여시정곡선。
The analytical model for vehicle-ballasted(unballasted)track-subgrade-ground vertical coupling vi-bration and the pseudo-excitation method are effectively combined in this paper. The accurate power spectrums of train stochastic vibrating loads are directly obtained by using the power spectral of track irregularity,and the time histories of train stochastic vibrating loads are solved by the trigonometric series approach in which sam-plings are conducted in the frequency domain. Thus a simple and effective method for calculating train stochas-tic vibrating loads in railway environmental vibration is provided. The power spectrum densities and time histo-ries of train stochastic vibrating loads generated by a CRH3 high speed train for two cases with ballast track and unballasted track are analyzed in the numerical example.