Yuhan Wang , Jincheng Hu , Xiaochuan Wang , Shijing Wu
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引用次数: 0
Abstract
To analyze the dynamic characteristics of whipping behavior induced by the circumferential fracture of high energy pipes, a numerical model of the piping system was presented based on the bidirectional fluid-structure interaction method. The reliability of this model was validated against experimental results. Furthermore, the dynamic characteristics of whipping behavior were studied, as well as the effects of some main parameters. The numerical results suggest that the entire whipping behavior can be divided into four stages: free-whipping stage Ⅰ, free-whipping stage Ⅱ, collision stage and periodic stage. The dynamic response of whipping behavior is different in the four stages and is dominated by a single mode with a frequency of 29.35 Hz under the combined action of the thrust force and U-bolt restraints. The increase of inlet flow rate causes the enhancement of thrust force and thus makes its dynamic response more complicated. The parameter analysis shows that the whipping behavior can be suppressed by choosing the small initial clearance, setting the suitable gap and increasing the straight segment length of U-bolt restraints. The above results are helpful to understand the dynamic characteristics of whipping behavior and provide valuable suggestions for the optimization of the protection measures.
为了分析高能管道周向断裂诱发的鞭打行为的动态特性，基于双向流固耦合方法提出了管道系统的数值模型。实验结果验证了该模型的可靠性。此外，还研究了鞭打行为的动态特征以及一些主要参数的影响。数值结果表明，整个鞭打行为可分为四个阶段：自由鞭打阶段Ⅰ、自由鞭打阶段Ⅱ、碰撞阶段和周期阶段。四个阶段的鞭打行为动态响应不同，在推力和 U 形螺栓约束的共同作用下，以频率为 29.35 Hz 的单一模式为主。入口流速的增加会导致推力的增强，从而使其动态响应变得更加复杂。参数分析表明，通过选择较小的初始间隙、设置合适的间隙和增加 U 型螺栓约束的直线段长度，可抑制鞭打行为。上述结果有助于了解鞭打行为的动态特性，并为优化保护措施提供了宝贵建议。
期刊介绍：
Pressure vessel engineering technology is of importance in many branches of industry. This journal publishes the latest research results and related information on all its associated aspects, with particular emphasis on the structural integrity assessment, maintenance and life extension of pressurised process engineering plants.
The anticipated coverage of the International Journal of Pressure Vessels and Piping ranges from simple mass-produced pressure vessels to large custom-built vessels and tanks. Pressure vessels technology is a developing field, and contributions on the following topics will therefore be welcome:
• Pressure vessel engineering
• Structural integrity assessment
• Design methods
• Codes and standards
• Fabrication and welding
• Materials properties requirements
• Inspection and quality management
• Maintenance and life extension
• Ageing and environmental effects
• Life management
Of particular importance are papers covering aspects of significant practical application which could lead to major improvements in economy, reliability and useful life. While most accepted papers represent the results of original applied research, critical reviews of topical interest by world-leading experts will also appear from time to time.
International Journal of Pressure Vessels and Piping is indispensable reading for engineering professionals involved in the energy, petrochemicals, process plant, transport, aerospace and related industries; for manufacturers of pressure vessels and ancillary equipment; and for academics pursuing research in these areas.
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