某商用車鋼板彈簧失效分析與結(jié)構(gòu)優(yōu)化

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中圖分類號：TP391.99；U463.334.1 文獻(xiàn)標(biāo)志碼：B

Failure analysis and structural optimization of a commercial vehicle leaf spring

YANG Ming1，WANG Yaping， XIAO Yong，LIU Yang ，WANG Shenghuai ， ZHANG Di

（1.Dongfeng Vasol Automobile Co.，Ltd.，Shiyan 442OOo，Hubei，China； 2.Hubei University of Automotive Technology，Shiyan 442OO2，Hubei，China）

Abstract： To solve the issue of steel leaf spring fracture in a commercial vehicle，the spring failure is analyzed from various aspects，such as leaf spring material， forming process，and structural design strength，and a nonlinear simulation model for leaf springs is built considering the load characteristics of different working conditions.According to the loading standard of the entire vehicle impact condition，the stress of the leaf spring under each condition is extracted. A detailed model of the leaf spring assembly is built，and the reliability of plate springs and bridge shell bottom plates is computed using the extracted leaf spring stress as the load，so the weak parts and the cause of fracture is determined. Taking the thickness of the main spring as the design variable，the structural stressof the leaf spring as the constraint condition，and the minimum total mass as the constraint objective，the size optimization of the leaf spring is carried out to find the minimum thickness of the spring that meets the stress requirements. The optimized main and auxiliary springs are subjected to fatigue durability tests，and the accuracy of the simulation results is verified.

Key words： fracture failure； load extraction； leaf spring； reliability； non linearity

0引言

商用車整車設(shè)計(jì)質(zhì)量逐步提升，整車結(jié)構(gòu)的安全性、舒適性、可靠性等設(shè)計(jì)要求更高，鋼板彈簧（板簧）能夠?qū)崿F(xiàn)在顛簸工況下輪胎激勵(lì)源振動(dòng)衰減，確保整車的振動(dòng)舒適性，其性能的好壞直接影響整車的品質(zhì)定位。（剩余6780字）