1、白車身扭轉(zhuǎn)和橫向剛度對整車操控性能的影響,姓名： 王愛華 學(xué)號：31503082,1,參考文獻,Hari Krishnan M, N Sreeraj, C Bhaskar, G Nagaraju and R Mugundaram， Maruti Suzuki India, Ltd. “Establishing Correlation between Torsional and Lateral Stiffness Parameters of BIW and Vehicle Handling Performance,” SAE Technical Paper 2011-01-0089, 2011,

2、 doi:10.4271/2011-01-0089,2,扭轉(zhuǎn)剛度,扭轉(zhuǎn)工況下車身抵抗變形的能力,Cornering,Passing steps,3,扭轉(zhuǎn)剛度的意義,靜態(tài)或動態(tài)扭轉(zhuǎn)工況下車上部件不受影響，比如車門可以整車開關(guān)，密封依然良好等。 整車的操控性，NVH，耐撞性，耐久性等。,4,As a result of many earlier studies, it is known that increase in stiffness of the vehicle body improves the handling of the vehicle. But, there has been no

3、 attempt made to predict how much improvement in handling occurs for a particular increase in body stiffness.,5,Process flow,仿真&實驗 主觀評價&客觀測試 大膽的假設(shè)，小心的求證。 NEWBILITY,6,CAE(Torsional Stiffness),Load & Boundary,Strain Energy Contour,7,CAE(Torsional Stiffness),Iterations done in CAE,8,CAE(Lateral Stiffne

4、ss),Load & Boundary,Strain Energy Contour,9,CAE(Lateral Stiffness),10,FABRICATIONS,11,FABRICATIONS,12,控制變量法,Effect of increase in torsional stiffness on lateral stiffness,13,Sin input test,An open-loop test method for determining the transient response behavior of road vehicles ISO/TR 8725 80kmph in

5、 a straight line Range of 30 deg to + 30 deg, 0.5 Hz Expert test drivers,14,Subjective evaluation- Torsional stiffness effect,扭轉(zhuǎn)剛度 小 大,15,Objective evaluation - Torsional stiffness effect,16,Correlation of Torsional stiffness,Yaw gain increases by 1.77% and time lag decreases by 4.12% with 10% incre

6、ase in body torsional stiffness.,17,Subjective evaluation - Lateral stiffness effect,18,Objective evaluation - Lateral stiffness effect,19,Correlation of Lateral stiffness,Yaw gain increases by 2.41% and time lag decreases by 4.57% with 10% increase in body lateral stiffness.,20,Validation,BIW torsi

7、onal stiffness increased by 29%,21,Subjective evaluation,22,Validation model Torsional stiffness,23,Conclusion,Overall response of the vehicle has improved due to the increase in torsional stiffness of the BIW. The increase in lateral stiffness of the front lower arm attachment points leads to significant improvement in overall vehicle response but no much change is there in the retur