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| Stress Analysis of Fixed Tubesheet Heat Exchanger |
| CHU Qibao1, YAO Lin2, WANG Qing1, FANG Yonggang1 |
| 1. Nuclear and Radiation Safety Center, Ministry of Environmental Protection, Beijing 100082, China;2. China Nuclear Power Engineering Co., Ltd., Beijing 100840, China |
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Abstract: Shell and tube exchanger is widely used in many industrial fields because of its high reliability and wide applicability. In a conventional design based on the code of GB 151—1999 "shell and tube heat exchanger", a method of equivalent approximation is used. There is a great difference between the equivalent mechanical model and the actual structure, especially for large or high parameter heat exchanger. If the conventional design method fails, we must find a new method of design. The finite element analysis is the most common method. In this paper, a finite element model is built for the heat exchanger test-bed by ANSYS. The stress analysis for the fixedly connected structure of shell, tube plate and tube is carried out. In the model, the solid element and the beam-shell element are used respectively. Both models are under a same temperature load and a same pressure load. Under the same conditions, the diffrent experiments are carried out. The experimental results are compared with the results of the finite element analysis. It is shown that with both the beam-shell element and the solid element, accurate results can be obtained. Considering the difficulty of modeling, engineering accuracy and calculation time, for the large or high parameter heat exchanger, the use of the beam-shell element can ensure the calculation accuracy and reduce the difficulty of modeling. It is a practical and feasible method.
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Received: 16 May 2013
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2013, Vol. 31 
