X90钢级高压气体管道爆炸裂纹起裂与止裂实验研究  

Experimental study on explosive crack initiation and crack-arrest of X90 steel grade high-pressure gas pipeline

作　　者：张俊男[1] 龙源[1] 吴建源[1] 程良玉[1] 马华原 

机构地区：[1]解放军理工大学野战工程学院,南京210007

出　　处：《工程爆破》2017年第4期21-25,38,共6页Engineering Blasting

基　　金：国家自然科学基金资助项目(11672331)

摘　　要：开展X90钢级高压气体管道爆炸模型实验,初步探索并解决了管道爆炸实验的关键技术问题,为管道全尺寸爆破实验提供数据和方法支撑。结果表明:实验方法及测试仪器的选择可靠有效,解决了管道封堵、初始裂纹引入、传感器安装及密封、动态参量测试以及测试系统构建等关键技术问题;填充空气的运行压力为12.3MPa的X90钢管裂纹最大扩展速度约为248m/s,临界止裂压力约为4.5MPa,临界止裂速度约为100m/s;裂纹止裂器止裂效果明显,可进一步优化其安装位置并适当加宽加厚,进一步提高止裂效果。Explosion model experiment of the X90 steel grade high-pressure gas pipeline was conducted to preliminarily solve the key technical problems of pipeline explosion experiment, provide data and methods for full-scale explosion experiment. Results showed that the experiment methods and instrument was reliable and effective？ the key technical problems of pipe plugging, in-itial crack bringing in, the sensors installation and sealing, dynamic parameters testing and construction of testing system were solved. When the operating pressure was 12. 3 MPa, the biggest crack propagating speed of air-filling X90 pipeline was about 248 m/s,its critical crack-arrest pressure was about 4. 5 MPa and critical crack-arrest speed was about 100 m/s. The effect of crack arrester was obvious,and to improve the crack-arrest effect, the installation position should be further optimized and the arrester should be widened and thickened properly.

关 键 词：髙压气体管道 线型聚能切割器 动态裂纹扩展 时间线 止裂器 

分 类 号：TH142[一般工业技术—材料科学与工程]