Discussion on the Implementation of the Primary Structure Method in Design by Analysis

Abstract:

The implementation of the primary structure method in design by analysis of pressure vessel is discussed. With two examples of axisymmetric structure of pressure vessel, flat head-cylindrical shell joint and flange-ellipsoidal head joint, the primary structure is constructed according to the principle of this method with ANSYS. By comparing the stress intensity and deformation of the primary structure with that of the original structure, the primary and secondary stress along the stress classification line can be clearly distinguished by using the primary structure method. It has great application value in dealing with stress classification in the elastic stress analysis method. The results also show that a variety of reasonable primary structures can be constructed based on the same original structure, and the primary structure method has some flexibility.

• Periodical: Applied Mechanics and Materials (Volume 853)
• Pages: 341-345
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.853.341
• Online since: September 2016
• Authors: Cheng Hong Duan*, Li Wei Ding, Ming Wan Lu
• Keywords: Design by Analysis, Finite Element Analysis, Pressure Vessel, Primary Structure Method, Stress Classification

References

[1] Kroenke W.C. Classification of Finite Element Stress According to ASME Section III, Stress Categories J. Winter Annual Meeting of the ASME, November (1973).

[2] Hollinger G L, Hechmer J L. Three-dimensional stress criteria-A weak link in vessel design and analysis J. ASME Pressure Vessel and Piping, 10999 (1986) 9-14.

[3] Hollinger G L, Hechmer J L. Summary of example problems from PVRC project on three dimensional stress criteria J. ASME Pressure Vessel and Piping, 338 (1996) 19-24.

DOI: 10.1115/1.556157

[4] Lu Mingwan. Analysis of the general design guidelines, Training course data of China National Standardization Committee on Pressure Vessels. Canton, 1988, 1. (in Chinese).

[5] Ming-Wan Lu, Yong Chen, Jian-Guo LI. Two–Step Approach of Stress Classification and Primary Structure Method J. Pressure Vessel Technology, 122 (2000) 2-8.

DOI: 10.1115/1.556139

[6] Wen-Huan Guan. The Implementation of Primary Structure Method in Design by Analysis J. Chemical Machinery, 39 (2012) 187-189. (in Chinese).

[7] GAOBingJun, YANG GuoZheng, DONG JunHua. Approach to Decompose the Primary Bending Stress in the Finite Element Analysis Results of Pressure Vessels J. Journal of Mechanical Strength, 30 (2008) 239-243. (in Chinese).

[8] BingjunGao, Xiaohui Chen, Xiaoping Shi. An Approach to Derive Primary Bending Stress from Finite Element Analysis for Pressure Vessels and Applications in Structure Design J. Journal of Pressure Vessel Technology, 132 (2010) 061101-1-8.

DOI: 10.1115/1.4001656