王愛(ài)華-白車身扭轉(zhuǎn)剛度對(duì)整車操控性能的影響

1、白車身扭轉(zhuǎn)和橫向剛度對(duì)整車操控性能的影響 姓名： 王愛(ài)華學(xué)號(hào)：31503082參考文獻(xiàn) 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, doi

2、:10.4271/2011-01-0089扭轉(zhuǎn)剛度 扭轉(zhuǎn)工況下車身抵抗變形的能力CorneringPassing steps扭轉(zhuǎn)剛度的意義 靜態(tài)或動(dòng)態(tài)扭轉(zhuǎn)工況下車上部件不受影響，比如車門(mén)可以整車開(kāi)關(guān)，密封依然良好等。 整車的操控性，NVH，耐撞性，耐久性等。 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 attempt made

3、to predict how much improvement in handling occurs for a particular increase in body stiffness. Process flow 仿真&實(shí)驗(yàn) 主觀評(píng)價(jià)&客觀測(cè)試 大膽的假設(shè)，小心的求證。NEWBILITYCAE(Torsional Stiffness)Load & BoundaryStrain Energy ContourCAE(Torsional Stiffness) Iterations done in CAECAE(Lateral Stiffness)Load & Bo

4、undaryStrain Energy ContourCAE(Lateral Stiffness)FABRICATIONSFABRICATIONS控制變量法 Effect of increase in torsional stiffness on lateral stiffnessSin input test An open-loop test method for determining the transient response behavior of road vehicles ISO/TR 8725 80kmph in a straight line Range of 30 deg

5、to + 30 deg, 0.5 Hz Expert test driversSubjective evaluation- Torsional stiffness effect 扭轉(zhuǎn)剛度 小 大Objective evaluation - Torsional stiffness effectCorrelation of Torsional stiffness Yaw gain increases by 1.77% and time lag decreases by 4.12% with 10% increase in body torsional stiffness. Subjective e

6、valuation - Lateral stiffness effectObjective evaluation - Lateral stiffness effectCorrelation of Lateral stiffness Yaw gain increases by 2.41% and time lag decreases by 4.57% with 10% increase in body lateral stiffness.Validation BIW torsional stiffness increased by 29%Subjective evaluationValidati

7、on model Torsional stiffnessConclusion 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 return-ability of