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研究基于基于多相合的计算方法和受外部爆炸负荷影响的埋下管道的结构动态反应
Ye Lu1, Yuqi Ding1, Jiahe Zhang1
1College of Mechanical Science and Engineering, Northeast Petroleum University, Heilongjiang, Daqing, 163318, China.
Heliyon
|August 9, 2023
概括
这项研究开发了一种多相合模型,以模拟外部爆炸下的埋藏管道. 石油管道比天然气管道具有更高的抗爆炸性,更高的内部流体速度降低了管道阻力.
科学领域:
- 地质技术工程 地质技术工程
- 机械工程 机械工程
- 计算流体动力学的流体动力学.
背景情况:
- 埋藏的管道易受外部爆炸负荷的影响,可能造成重大压力和变形.
- 了解管道对爆炸的反应对于基础设施的安全和完整性至关重要.
研究的目的:
- 建立和验证一个多相合数值模型,用于分析埋管道对外部爆炸的反应.
- 研究管道含量 (石油与天然气) 和内部流体速度在爆炸条件下对管道结构完整性的影响.
主要方法:
- 开发一个包含管道,土壤和内部流体动态的多相合模型.
- 使用惩罚函数合方法用于土壤-管道和流体-管道相互作用.
- 对土壤-管道-流体系统的多相合总溶液变化原理函数的导出.
- 数字模拟和实验验证,达到大约5%的最大误差.
主要成果:
- 气管道周围土壤的峰值爆炸压力高于石油管道的峰值爆炸压力.
- 与天然气管道相比,石油管道表现出优越的结构反应,最大辐射位移 (3.83毫米) 和应力 (3.75%) 降低.
- 增加的内部流体速度 (1.5 m/s vs. 1 m/s) 会导致管道中更大的辐射位移 (2.65 mm) 和应力 (5.72%).
结论:
- 经过验证的多相合模型准确地预测了外部爆炸下的埋藏管道行为.
- 石油管道本身具有比天然气管道更好的变形和抗爆炸性.
- 较高的内部流体速度显著损害了管道对变形和爆炸冲击的抵抗力,突出了运行安全方面的考虑.
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