Numerical and Experimental Study on Buckling of Longitudinal Corrugated Cylindrical Pressure Shell

doi:10.3901/JME.2020.07.164

Abstract

Abstract: Strengthening the carrying capacity of cylindrical pressure-resistant shells by adding circumferential or axial corrugations has received considerable research attention. The buckling behaviors of cylindrical shell and longitudinal corrugated cylindrical shell with equal volume are studied using numerical and experimental methods. Firstly, the geometric and numerical models of the corrugated cylinder shell are established, and the influence of the corrugation parameters on the buckling of the corrugated cylinder shell under uniform external pressure is analyzed. Secondly, two sets of cylindrical and corrugated cylindrical shells with equal wall thickness and volume are designed and manufactured after the parameter optimization of corrugation. Then, the outer surfaces of these fabricated shells are scanned and transformed into numerical models to investigate their buckling characteristics. Finally, each model is slowly loaded to collapse under quasistatic pressure in a cylindrical pressure vessel and the relationship of collapse loads and numerical buckling loads is analyzed. The results show that the buckling performance of the longitudinal corrugated cylinder shell is better than that of the cylindrical shell, and the magnitude of the average buckling loads has a 56.8% increase. The buckling capacity of cylindrical shell can be significantly improved by addition of longitudinal corrugated stiffener.

Key words: uniform external pressure, cylindrical shell, longitudinally corrugated stiffener, buckling

CLC Number:

U661

TANG Wenxian, LI Shengqiu, ZHANG Jian, WANG Yueyang, WANG Weimin, ZHANG Shan. Numerical and Experimental Study on Buckling of Longitudinal Corrugated Cylindrical Pressure Shell[J]. Journal of Mechanical Engineering, 2020, 56(7): 164-170.

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