蒸汽发生器传热管流体结构耦联动态特性分析
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摘要
利用流体-结构动力学理论对蒸汽发生器传热管动态特性进行了解析推导,得出了该种传热管的流固耦合动态特性,并用MATLAB计算出其耦合固有频率。利用参数化有限元模型,对传热管进行了流固耦合动态特性数值模拟,所得结果验证了解析推导的正确性,且得到了一些有价值的结论。数值模拟重点研究了管外流体半径的变化对传热管固有频率的影响。
Firstly, dynamic characteristic of pressurized water reactor steam generator heat exchange tube is analyzed with theory of fluid-structure dynamics, and the fluid-structure interaction frequencies are calculated by using MATLAB. Then, the Finite element models are given by using ANSYS parametric design language (APDL). And the fluid-structure interaction dynamic characteristic of the tubes is simulated with the models. The results validate that the analytical derivations are right, also some useful conclusions are given. The simulation focuses on the effects of the radius of the outer fluid on the natural frequencies of the tube.
Firstly, dynamic characteristic of pressurized water reactor steam generator heat exchange tube is analyzed with theory of fluid-structure dynamics, and the fluid-structure interaction frequencies are calculated by using MATLAB. Then, the Finite element models are given by using ANSYS parametric design language (APDL). And the fluid-structure interaction dynamic characteristic of the tubes is simulated with the models. The results validate that the analytical derivations are right, also some useful conclusions are given. The simulation focuses on the effects of the radius of the outer fluid on the natural frequencies of the tube.
引文
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[5]Jong Chull Jo,Myung Jo Jhung,Woong Sik Kim,et al.Dynam-ic characteristics of steam generator U-tubes with defect[J].Nuclear Engineering and design.2005:235:821—831.
[6]Jong Chull Jo,Won Ky Shin.Fluid elastic instability analysisof operating nuclear steam generator U-tubes[J].Nuclear En-gineering and Design.1999(193):55—71.
[2]张敏.桥墩与河水流固耦合振动分析[D]:[学位论文].大连:大连交通大学,2006.
[3]Housner G W.Dynamic pressure on accelerated fluidcon2tainers[J].Bulletin of the seismological society of Ameri-ca 47,1,1957,15—35.
[4]Paidoussis M P,Issid N T.Dynamics stability of pipes conve-ying fluids[J].Journal of Sound and Vibration.1974,33(2):267—294.
[5]Jong Chull Jo,Myung Jo Jhung,Woong Sik Kim,et al.Dynam-ic characteristics of steam generator U-tubes with defect[J].Nuclear Engineering and design.2005:235:821—831.
[6]Jong Chull Jo,Won Ky Shin.Fluid elastic instability analysisof operating nuclear steam generator U-tubes[J].Nuclear En-gineering and Design.1999(193):55—71.
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