某商用车散热器支架断裂故障分析与结构优化

打开文本图片集

中图分类号：U463 DOI：10.20042/j.cnki.1009-4903.2025.06.008

Failure Investigationand Structural Optimizationofa Commercial VehicleRadiator BracketFracture

Abstract：Fora4.5-toncommercialvehicleexperiencingradiatorbracketfracturesduringrelabityoadtesting，thisstudyemploys finiteelementanalysis（FE）forfaultdiagnosisandstructuraloptimization.Afiniteelementmodelincoporatingthebracketandpatal chassiswasestablishedusingtheHyperWorkssoftwareplatform.Byconstrainingthemainongitudinalbeamsandapplyingexcitation staticanddynamicstrengthanalyseswereconductedtocomparethedesignstatewiththeactualvehiclefracturecondition.Results indicatethatstressesundervariousstaticloadconditionsrmaiedwihinlimits.HoweverunderYdirectionsweepexcitationepeak stresszone（156MPa）preciselycorrspondedtotheactualveiclecracklocationconfimingYdirectiondynamicresonanceaste rotcauseoffacture.Bsedotstiaiosoutisweepropoed：nreaingplatetknssdngstfnrsndding materials.After optimization，the peak dynamic stress in the Y-direction decreased to 96MPa ，representinga 38.5% reduction and effectivelyeliminatingthecrackingrisk.Tisstudyprovidesaneffctivesolutionforreliabiltdesinandfailurepreventionofcassis accessories.

Keywords：Radiator bracket；FEA；Failure diagnosis；Structural optimization；Vibration fatigu

0 引言

商用车冷却系统是保障发动机在适宜温度下稳定运行的核心，其效能直接关系到整车的可靠性与经济性1。（剩余3095字）