【作者】 林家浩； 吕峰； 张亚辉；

【Author】 Lin Jiahao Lu Feng Zhang Yahui (State Key laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian,116023)

【机构】 大连理工大学工业装备结构分析国家重点实验室；

【摘要】 将轨道视为无限长的周期结构,建立车辆轨道垂向耦合模型。使用虚拟激励法将随机的轨道不平顺激励转化为确定性的简谐激励,再用辛数学方法求解轨道结构的频率响应特性和耦合系统的响应功率谱。整个计算模型只有26个自由度,求解过程快速而精确。数值算例中,将本文方法与常规有限元方法进行了比较,解验证了本文方法的高效和正确性;讨论了车辆速度对系统随机响应的影响。更多还原

【Abstract】 The vertical coupling model of vehicle-track systems is set up,in which the track is regarded as an infinite periodic structure.The random rail irregularity excitation is transformed into a deterministic harmonic excitation in terms of the pseudo excitation method,and the frequency response characteristics of the track and the system response PSD are analysed using the symplectic algorithm.The computational model used has only 26 DOFs,so that the random vibration analysis is very efficient.In the numerical examples,the correctness and high efficiency of the proposed method is verified by means of comparisons with the conventional FEM, and the influence of the vehicle velocity on the system vibration is investigated.更多还原