Combined Hybrid Finite Element Method Applied in Transient Thermal Stress Problem

doi:10.16615/j.cnki.1674-8190.2017.04.001

Home > Archive>Volume 8, Issue 4, 2017 >367-374. DOI:10.16615/j.cnki.1674-8190.2017.04.001

Combined Hybrid Finite Element Method Applied in Transient Thermal Stress Problem
DOI:
                        10.16615/j.cnki.1674-8190.2017.04.001
                    
Author:
                        
                        
                    
Affiliation:Northwestern Polytechnical University,Northwestern Polytechnical University
Clc Number:O242. 21
Fund Project:National Natural Science Foundation of China (No. 11471262, 11501450), and the Doctorate Foundation of Northwestern Polytechnical University (No. CX201524)

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Abstract:

Thestabilityofhybridfiniteelementmethodoftransientthermalstressproblemishardtobeguaran-teedbecauseofthedifficultyofsatisfyingtheladyshenskaya-babuska-brezzi(LBB)conditions,accordingly,the combinedhybridfiniteelementmethodoftransientthermalstressproblemisproposed.Combinativevariation principleandthecorrespondingfiniteelementdiscretizationoftransientthermalstressproblemisconstructedon thebasisofdomaindecompositiontechnique.Thenumericalperformanceofcombinedhybridelementforsol-vingtransientthermalstressproblemisverifiedbynumericalexperiments.Thenumericalresultsindicatethat combinedhybridelementwith8nodes(CHH(0-1))cangivealmostthesamecomputingaccuracyofdisplace-mentandbettercomputingaccuracyofstresscomparedwithcuboidelementwith20nodes(B20). Keywords:transient;thermalstressproblem;combinativevariationprinciple;stability;combinedhybridele-ment;bigwidth-to-thicknessratio;stressaccuracy

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zhang ling, Nie Yufeng. Combined Hybrid Finite Element Method Applied in Transient Thermal Stress Problem[J]. Advances in Aeronautical Science and Engineering,2017,8(4):367-374

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Received:September 26,2017
Revised:October 12,2017
Adopted:October 20,2017
Online: November 21,2017
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