【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。更多还原

【Abstract】 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.更多还原