Static strength design of copper cylinder based on reliability
YANG Fan
CHEN Gang
CHEN Fan
LIU Bing
ZHANG Hongwei
LIU Xiaoning
Abstract：[Objective]Aiming at the lack of systematic reliability design method for static strength of copper thin-walled cylinders under internal pressure,a reliability design method for static strength of copper single-layer thin-walled long cylinders under internal pressure was established,and the value boundaries of key design parameters under different working conditions were quantified.[Methods]Firstly,a general correlation formula between cylinder reliability coefficient,test stress limit coefficient,load coefficient and safety factor was established by probability theory when both static strength and load obey normal distribution and the static strength distribution parameters are interval values,which provided a calculation basis for quantitative reliability analysis;secondly,benchmarking against the reliability standard of steel cylinders and spherical tanks,the allowable reliability coefficients of yield strength and burst strength of copper cylinders under different working conditions were determined according to the minimum service requirements;then,based on the allowable reliability coefficients,the value ranges of test stress limit coefficient,yield and burst safety factors,and load coefficient under different working conditions were determined;finally,the rationality of relevant design parameters in the national standard was verified.[Results]The recommended yield safety factor and burst safety factor of copper cylinder are 1.45 and 2.00 respectively,and the value ranges of test stress limit coefficient and load coefficient under different working conditions are quantified.The analytical results are basically consistent with the parameters in the national standard,which enriches the content of reliability-based static strength design of copper cylinders and provides a reference for the structural design of copper pressure-bearing cylinders.
Keywords：Copper cylinderStatic strengthReliability coefficientTest stress limit coefficientSafety factorLoad coefficient
Publication Date：2026-04-30
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：11( 148-158 )