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Research Papers: Design and Analysis

The Limit Load Interactions of the Brazed Aluminum Plate-Fin Heat Exchanger Header Under Combined Piping Loads

[+] Author and Article Information
Wei Wang

College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian 350108, P.R. Chinamkwang@fzu.edu.cn

Liang Chen

 Fujian Provincial Engineering Research Center of Digital Design for Manufacturing, Fuzhou, Fujian 350002, P.R. China

Caidong Guo

 Minxi Vocational Technical College, Longyan, Fujian 364021, P.R. China

J. Pressure Vessel Technol 133(3), 031204 (Mar 30, 2011) (7 pages) doi:10.1115/1.4002050 History: Received August 15, 2009; Revised June 05, 2010; Published March 30, 2011; Online March 30, 2011

In order to investigate the strength design problem of the brazed aluminum plate-fin heat exchanger header under complex external piping loads, the limit load interactions of the header under combined piping loads are studied in this paper. To establish the limit piping load interaction curves, nonlinear finite element analysis assuming the elastic perfectly plastic material model is performed by using the commercial finite element analysis software ANSYS and multiple piping load combinations, which are the combination of orthogonal bending moment components, torque component-shear force component, bending moment component-axial force component, compound bending moment-axial force component, and torque component-compound shear force, of the header with six opening ratios ranging from 0.5 to 1 are explored. The results of the interaction diagrams show that the feasible combined piping load zone of the header derived from the interaction curves can be simplified as a triangular zone determined by the individual limit piping load components safely and the simplified feasible zone is suggested to be used for establishing a simplified safety assessment method for the header under combined piping loads.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

Header piping load components

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Figure 2

The finite element analysis model of the brazed aluminum plate-fin heat exchanger header

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Figure 3

The characteristic My-u response curve of the example header

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Figure 4

The stress contours of the example header at four stages of incremental My loading

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Figure 5

The limit load interaction My/MyL-Mx/MxL(D/T=20)

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Figure 6

Torque component versus shear force component limit interaction (D/T=20)

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Figure 7

Bending moment components versus axial force component limit interaction (D/T=20)

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Figure 8

The limit load interaction of compound piping loads when d/D equals 0.5

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Figure 9

The limit load interaction of compound piping loads when d/D equals 0.6

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Figure 10

The limit load interaction of compound piping loads when d/D equals 0.7

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Figure 11

The limit load interaction of compound piping loads when d/D equals 0.8

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Figure 12

The limit load interaction of compound piping loads when d/D equals 0.9

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Figure 13

The limit load interaction of compound piping loads when d/D equals 1.0

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