摘要
输油管道在服役过程中由于各种因素形成缺陷,遭遇明火极有可能发生爆炸。为研究内爆炸荷载作用下钢管的动力响应规律,采用不同剂量的乳化炸药对封闭钢管进行内爆炸荷载试验,试验中通过沿管壁布置超压和加速度传感器及应变片的方式测量管壁的动力响应。试验结果表明:钢管在内爆炸荷载作用下,应变、超压和加速度迅速达到峰值,但下降速度不同;同一位置处的应变,随着与轴向角度的增加,应变逐渐增大;随着炸药量的增加,超压衰减率逐渐增大,加速度增加速率逐渐减小;根据超压数据,拟合密闭空间中超压峰值计算公式,与实测值基本吻合,可为预估密闭空间中超压峰值提供参考。
During the service process of oil pipeline,due to various factors forming defects,it is very likely that explosion will occur when the pipeline is exposed to open fire.In order to study the dynamic response of steel tube under internal explosive load,different doses of emulsified explosives were used to test the dynamic response of closed steel tube under internal explosive load.In the test,the dynamic response of the tube wall was measured by arranging overpressure and acceleration sensors and strain gauges along the tube wall.The test results show that the strain,overpressure and acceleration of steel tube reach the peak value rapidly under the action of internal explosive load,but the descending speed is different;the strain at the same position increases gradually with the increase of the angle with the axis;the attenuation rate of overpressure increases gradually with the increase of the explosive quantity,and the acceleration increase rate decreases gradually;according to the overpressure data,the overpressure in the closed space is fitted.The formula for calculating the peak pressure is basically in agreement with the measured value,which provides a reference for predicting the peak overpressure in confined space.
作者
路四方
卢永刚
黄辉
贾彬
LU Sifang;LU Yonggang;HUANG Hui;JIA Bin(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Institute of General Engineering,China Academy of Engineering Physics,Mianyang 621900,Sichuan,China)
出处
《西南科技大学学报》
CAS
2019年第4期41-45,共5页
Journal of Southwest University of Science and Technology
基金
国家自然科学基金项目(51908476)
四川省科技计划项目(2018SZ0355)
关键词
超压
加速度
应力应变
动力分析
输油管道
Overpressure
Acceleration
Stress-strain
Dynamic analysis
Oil pipeline
