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research-article

A temporary local rigid clamping structure to improve anti-buckling ability of the thin-walled cylinder under external pressure

[+] Author and Article Information
Bingjun Gao

School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
gbj_hebut@163.com

Zongxun Yin

School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
1244766806@qq.com

Fuhai Zhao

Hebei Supervision & Inspection Institute of Boiler & Pressure Vessel, Shijiazhuang, 050061, China
fhzhao_sjz@163.com

Chengwen Shang

Enric Gas Equipment Co.Ltd.,Shijiazhuang, 051430, China
shangchengwen@enricgroup.com

1Corresponding author.

ASME doi:10.1115/1.4040496 History: Received July 19, 2017; Revised May 24, 2018

Abstract

Although the inner container of cryogenic liquid semitrailer works under inner pressure, it needs to be vacuumed during the helium leak detection. Although equipped with stiffening structure such as supporting rings for baffles inside the container, the inner container usually cannot meet the stability requirements during the evacuation. So a kind of temporary local rigid clamping structure was proposed to improve the anti-buckling ability of the inner container during the helium leak detection. "Lulu" can was taken as thin-walled cylindrical shell specimen under external pressure, and is clamped with the temporary local rigid ring outside. The critical pressure were experimentally and numerically studied for specimen with local clamping rings of different sizes, in which eigenvalue buckling analysis and nonlinear analysis were employed with the aid of ANSYS. It indicates that the critical pressure of specimen with local clamping ring is higher than that without clamping ring. Finally, the optimal clamping scheme including size and location of clamping rings for the inner container of DC18 type cryogenic liquid semitrailer was studied with finite element method, which aimed to improve the anti-buckling capacity of the inner container during the helium leak detection.

Copyright (c) 2018 by ASME
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