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Start Over Author "Xingdong Su" Topic general materials science
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2. Fatigue life analysis of supercharged boiler based on the design by analysis method

Author

Jianxin Shi, Zhenhua Zhang, Guolei Zhang, Youdong Duan, Xingdong Su, Qingpeng Zeng, and Yanjun Li

Subjects
0209 industrial biotechnology, Computer simulation, business.industry, Mechanical Engineering, Boiler (power generation), Strength theory, 02 engineering and technology, Structural engineering, Stress (mechanics), Equivalent stress, Stress field, 020303 mechanical engineering & transports, 020901 industrial engineering & automation, Amplitude, 0203 mechanical engineering, Mechanics of Materials, General Materials Science, business, Analysis method, Mathematics
Abstract

Supercharged boilers are widely used as the core equipment of ship steam-power plants. A 1:1 model is built considering the connection details of tube-tubesheet joints. Furthermore, numerical simulation of stress field and fatigue life based on the DBA method is conducted. The results show that the maximum equivalent stress amplitude of 253.81 MPa appears on the tube-tubesheet joint of the tube plant radiation area. The total stress amplitude is dominated by the thermal stress range. The last calculated permissible number of cycles based on the fourth strength theory is 161,744 times, which is 15.7% higher than the result calculated by the third strength theory.

Published
2020
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