摘要
在魏善庄-安定道口处进行了测量试验,沿钢轨布置了6个测点,测得18趟列车振动时产生的108条加速度波形,并进行了数据处理和分析,对每条加速度-时间历程曲线的均值进行了统计,通过最小二乘法拟合出加速度均值随距离衰减的相关函数,并在距钢轨10m处模拟了三个不同跨度的网架,分别进行了静力、自振频率和振型以及动力响应的计算,并把动力计算与静力计算进行了比较,得出动力响应与结构跨度之间的关系.
The practical tests were carried out at An Ding cross of Weishan Village. We fixed up 6 pickup points along the rail. One hundred and eighteen acceleration waves were picked up under the condition of different train speeds, and the data were handled and analyzed. By the statistic to average values of each acceleration time curve, its die away curve function with distance was drawn up according to the least square method. As examples three trusses with different spans at the pick up point of 10 m from the rail,were chosen to calculate their static forces self vibration frequency, vibration shape and dynamic response. With the comparison between static results and dynamic ones, a relationship connected with dynamic response and different structural spans was gained.
出处
《北方交通大学学报》
CSCD
北大核心
1998年第4期57-60,共4页
Journal of Northern Jiaotong University