基于Blackman-turkey法生成轨道不平顺时程研究  

On Time History of Track Irregularity Based on Blackman-Turkey Method

作　　者：崔高航[1,2] 陶夏新[2] 朱增强[3] 边艳丽[4] 

机构地区：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090 [3]塔里木油田公司西气东输项目经理部,新疆库尔勒841000 [4]沈阳建筑大学图书馆,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第4期644-649,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金重点项目(50538030);黑龙江省教育厅项目(11531317)

摘　　要：目的为研究城轨交通三维空间振动传播规律,探讨了激励源-轮轨接触面不平顺时程的获取方法.方法采用周期图法,根据功率谱估计轨道谱的傅里叶谱的幅值,再辅以随机相位角,通过傅里叶逆变换(IFFT)得到轨道不平顺时程样本.结果推导了轨道不平顺谱从空间域向频率域的转化关系,研究了依谱密度函数生成时程样本的方法,给出了三种方法生成的美国六级轨道谱对应的时程样本,比较了三种方法的计算效率和精度.结论 Blackman-Turkey法生成的时程无论从精度还是从计算速度方面都优于三角级数法和白噪声滤波法生成的时程样本,生成的不平顺时程可以用于车辆-轨道-路基系统的非线性振动分析.For the purposes of analyzing three dimensional propagation rules induced by moving urban rail transit on ground, we get track irregularity time-history sample as the excitation source. At fist, we derived the track spectrum from spatial domain to the frequency domain. Then, the methods of obtaining track irregularity time-history according to spectral density function were studied. Three methods were put forward, and the accuracy and efficiency of each method were compared. The results showed, the track irregularity timehistory sample based on Blackman-Turkey method was superior to other two process method generated. The track irregularity time-history based on Blackman-Turkey method can be used for vehicles-track-subgrade system nonlinear analysis.

关 键 词：轨道不平顺 轨道谱 Blackman—turkey法 时程样本 

分 类 号：U239.5[交通运输工程—道路与铁道工程]