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为探明爆炸冲击条件下管线接头部位受力变形的特点和规律,在室内爆炸试验碉堡测试系统内分别对直管线、带直接头和弯头管线动力响应情况进行对比试验研究,测试了接头连接处迎爆面及其背面的轴向应变,并对测试结果进行了对比分析。结果表明,管径突变会产生应力集中,接头部位是管线系统的薄弱环节;接头的厚径比是影响接头部位防爆抗震性能的重要参数;接头的类型是影响管线系统防爆抗震性能的重要因素,在管线设计中要尽量减少弯头数量,设置橡胶软接头可增强管线系统防爆抗震性能。
In order to find out the characteristics and rules of the stress and strain of the pipe joint under the impact of explosion shock, the dynamic response of straight pipe, straight pipe and elbow pipeline were compared and tested respectively in the test system of bunker test in indoor explosion test. At the blast surface and the back of the axial strain, and the test results were compared. The results show that the stress concentration is caused by the sudden change of the pipe diameter, and the joint part is the weak link of the pipeline system. The ratio of the thickness to the diameter of the joint is an important parameter that affects the explosion-proof and anti-seismic performance of the joint. The type of joint is an important factor affecting the anti- In the pipeline design to minimize the number of elbows, set the rubber soft joints can enhance the pipeline system explosion-proof seismic performance.