核电厂主蒸汽管道流致声振动优化方法研究

A study on optimization of flow induced acoustic vibration in a main steam line

近年来,核电站蒸汽管道流致声共振现象引发的振动和噪声问题,严重影响了核电厂的安全运行。为减小振动噪声的影响,该研究针对主蒸汽管道滞流分支管设计开展了研究,通过理论和有限元仿真分析的方法,研究了优化安全阀支管设计,避开声频率锁定,降低流致声共振强度的方法。研究结果表明,通过优化支管设计可以有效的降低流致声振动的激励源头载荷,减小主蒸汽管道的振动噪声。该研究的结论可用于在役电厂主蒸汽管道振动噪声的设计优化改造和新电厂的主蒸汽管道设计。

In recent years,the vibration and noise induced by flow acoustic resonance in a mean steam line has seriously harmed the operation safety of a nuclear power plant.To reduce the harm of vibration and noise,the improvement of stagnant branch structure design has been studied.Through the theoretical and finite element analysis,the methods of avoiding acoustic frequency lock in and reducing the intensity of acoustic resonance by various branch designs has been studied.The results show that the source load can be effectively reduced by the improved branch design.The conclusion can be used for main steam line optimization in nuclear power plants.