结合原弹性管束的结构及工作特点,提出了弹性管束的优化结构。理论推导了弹性管束的端部受力特性,并采用实验与数值模拟相结合的方法对管束振动特性进行研究,得到了其面外、面内振动的振型、固有频率。实验结果表明,与原弹性管束相比,新型弹性管束端部截面所受弯矩不足原管束的1/6,安全性能有了较大提高;固有频率较原管束低,更易于在外流的激励下产生振动;单位容积的传热面积相应增加24.7%。 Combined with the structure and working characteristics of the original elastic tube bundle, the optimal structure of the elastic tube bundle is proposed. The mechanical properties of the ends of the elastic tube bundles were deduced theoretically. The vibration characteristics of the tube bundles were studied by a combination of experimental and numerical simulation. The modes and natural frequencies of the tube were obtained. The experimental results show that compared with the original elastic tube bundle, the endurance of the new elastic tube bundle is less than 1/6 of that of the original tube bundle. The safety performance has been greatly improved. The natural frequency is lower than that of the original tube bundle, Under the vibration; heat transfer area per unit volume increased by 24.7%.