An improved version of the analytical solutions by Xue, Hwang and co-workers (1991, “Some Results on Analytical Solution of Cylindrical Shells With Large Opening,” ASME J. Pressure Vessel Technol., 113, 297–307; 1991, “The Stress Analysis of Cylindrical Shells With Rigid Inclusions Having a Large Ratio of Radii,” SMiRT 11 Transactions F, F05/2, 85–90; 1995, “The Thin Theoretical Solution for Cylindrical Shells With Large Openings,” Acta Mech. Sin., 27(4), pp. 482–488; 1995, “Stresses at the Intersection of Two Cylindrical Shells,” Nucl. Eng. Des., 154, 231–238; 1996, “A Reinforcement Design Method Based on Analysis of Large Openings in Cylindrical Pressure Vessels,” ASME J. Pressure Vessel Technol., 118, 502–506; 1999, “Analytical Solution for Cylindrical Thin Shells With Normally Intersecting Nozzles Due to External Moments on the Ends of Shells,” Sci. China, Ser. A: Math., Phys., Astron., 42(3), 293–304; 2000, “Stress Analysis of Cylindrical Shells With Nozzles Due to External Run Pipe Moments,” J. Strain Anal. Eng. Des., 35, 159–170; 2004, “Analytical Solution of Two Intersecting Cylindrical Shells Subjected to Transverse Moment on Nozzle,” Int. J. Solids Struct., 41(24–25), 6949–6962; 2005, “A Thin Shell Theoretical Solution for Two Intersecting Cylindrical Shells Due to External Branch Pipe Moments,” ASME J. Pressure Vessel Technol., 127(4), 357–368; 2005, “Theoretical Stress Analysis of Two Intersecting Cylindrical Shells Subjected to External Loads Transmitted Through Branch Pipes,” Int. J. Solids Struct., 42, 3299–3319) for two normally intersecting cylindrical shells is presented, and the applicable ranges of the theoretical solutions are successfully extended from $d/D\u22640.8$ and $\lambda =d/(DT)1/2\u22648$ to $d/D\u22640.9$ and $\lambda \u226412$. The thin shell theoretical solution is obtained by solving a complex boundary value problem for a pair of fourth-order complex-valued partial differential equations (exact Morley equations (Morley, 1959, “An Improvement on Donnell’s Approximation for Thin Walled Circular Cylinders,” Q. J. Mech. Appl. Math. 12, 89–91; Simmonds, 1966, “A Set of Simple, Accurate Equations for Circular Cylindrical Elastic Shells,” Int. J. Solids Struct., 2, 525–541)) for the shell and the nozzle. The accuracy of results is improved by some additional terms to the expressions for resultant forces and moments in terms of complex-valued displacement-stress function. The theoretical stress concentration factors due to internal pressure obtained by the improved expressions are in agreement with previously published test results. The theoretical results discussed and presented herein are in sufficient agreement with those obtained from three dimensional finite element analyses for all the seven load cases, i.e., internal pressure and six external branch pipe load components involving three orthogonal forces and the respective three orthogonal moments.

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# An Analytical Method for Cylindrical Shells With Nozzles Due to Internal Pressure and External Loads—Part I: Theoretical Foundation

Ming-De Xue

,
Ming-De Xue

Department of Engineering Mechanics, AML,

Tsinghua University

, Beijing 100084, P.R. China
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Qing-Hai Du

,
Qing-Hai Du

China Ship Scientific Research Center

, Wuxi, Jiangsu 214082, P.R. China
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Keh-Chih Hwang

,
Keh-Chih Hwang

Department of Engineering Mechanics, AML,

Tsinghua University

, Beijing 100084, P.R. China
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Zhi-Hai Xiang

Zhi-Hai Xiang

Department of Engineering Mechanics, AML,

Tsinghua University

, Beijing 100084, P.R. China
Search for other works by this author on:

Ming-De Xue

Department of Engineering Mechanics, AML,

Tsinghua University

, Beijing 100084, P.R. China
Qing-Hai Du

China Ship Scientific Research Center

, Wuxi, Jiangsu 214082, P.R. China
Keh-Chih Hwang

Department of Engineering Mechanics, AML,

Tsinghua University

, Beijing 100084, P.R. China
Zhi-Hai Xiang

Department of Engineering Mechanics, AML,

Tsinghua University

, Beijing 100084, P.R. China*J. Pressure Vessel Technol*. Jun 2010, 132(3): 031206 (9 pages)

**Published Online:**May 19, 2010

Article history

Received:

June 3, 2009

Revised:

January 17, 2010

Online:

May 19, 2010

Published:

May 19, 2010

Connected Content

A companion article has been published:
An Analytical Method for Cylindrical Shells With Nozzles Due to Internal Pressure and External Loads—Part II: Design Method

Citation

Xue, M., Du, Q., Hwang, K., and Xiang, Z. (May 19, 2010). "An Analytical Method for Cylindrical Shells With Nozzles Due to Internal Pressure and External Loads—Part I: Theoretical Foundation." ASME. *J. Pressure Vessel Technol*. June 2010; 132(3): 031206. https://doi.org/10.1115/1.4001199

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