管壳式换热器管束动力特性研究

摘要

针对工程应用中换热器由于振动而产生破坏的情况,采用流固耦合分析方法,模拟了单根换热管共振特性,并结合GB/T 151—2014《热交换器》中的计算公式对ANSYS计算结果进行了验证.此外,通过有限元软件ANSYS进一步分析了换热管数量对换热器管束共振频率的影响.仿真结果表明:随着换热管数目的增加,管束频率带宽将增大,其下限逐渐减小,上限将逐渐增大.该研究对换热器的防振设计有一定的参考意义.%Aiming at the damage caused by vibration of heat exchangers in engineering applications,the method of fluid-structure coupling was adopted to simulate the resonance characteristics of a single heat exchange tube, and the result was verified by the calculating formula in GB/T 151-2014 "Heat Exchangers".In addition, the influence of heat exchange tube number on the resonant frequency of the heat exchanger was further analyzed by the finite element software ANSYS.The simulation results show that with the quantity of heat exchange tubes increasing, the frequency bandwidth of the tube bundle will increase,and the lower limit will gradually decrease,the upper bound will gradually increase.The results will be of some guiding significance for the anti-vibration design of the heat exchangers.