新能源车侧围锁扣安装区疲劳强度改进

打开文本图片集

中图分类号：U463.834 文献标识码：A 文章编号：1003-8639（2026）01-0020-03

Improvement of Fatigue Strength in the Installation Area of the Side PanelLock Striker of New EnergyVehicles

Li Shize

（Wuhan Technical University，Wuhan 43oO74，China

【Abstract】This paper focuses on the problem of sheet metal cracking near the weld points in the side panel lock instalation areaof a new energy vehicleduring therear door opening and closing durability test （25，OoO cycles）.The rearhalfofthevehiclebodyis takenas theresearchobject，andthefatigue stressdistributioninthisareaisanalyzed by combining tests with FiniteElement Analysis （FEA）.Aiming atthe problem thatthe fatigue performance ofthe solder jointareais inferiortothatofthegeneral structuralarea，fiveimprovementschemescenteredonsolderjointadjustment and structural adhesive aditionareproposed.Thedurabilityperformanceofeachscheme is evaluatedthrough simulation analysis，and theoptimalschemeis verified through benchtests.Theresults showthatthehazardousareas identified by thefiniteelementanalysisareconsistentwith thecrack areas inthetest.Thefinalselected schemeof"adding structural adhesiveonthebasis oftheoriginalscheme"reducedthestressoftheside panelto124MPa （lower thantheelastic limit of 180MPa of DC06cold-roled steel plate），withover50，00 testcycles，meeting therequirementsofopening andclosing durability，while also taking into account cost and process，providing areference for similarbody fatigue problems.

【Key words】opening and closing durability;structural optimization;Finite Element Analysis;fatigue strength

0 引言

车门作为车身核心分总成，其刚度、强度、可靠性及耐久性需满足整车性能要求，同时需保证开闭操纵便捷性、密封性与安全性，直接影响用户对车辆的使用体验与品质感知1。（剩余3524字）