【摘要】 本文充分考虑了各种影响因素，采用理论分析和实验研究相结合的方法，得到了Ｕ型管管束固有频率的计算公式。实验结果表明，该公式的误差，一般在±８％以内，满足工程设计要求。另外，本文提供了相应图表，使工程设计简单方便。更多还原

【Abstract】 On the basis of the theoretical analysis and experimental investigation,a theoretical formula to colculate the natural frequency of varied U bundle is presented. The experimental results show that the deviations of this formula are within the range of ±8%,given in the form of charts and data,are appeicable and can meet the requirement of engineering design.更多还原