撓性橡膠接頭對車輛操控性之影響

The Effect of Flexible Bush Joints on Vehicle Handling

郭俊宏(Jun-Hong Guo)

指導教授 ： 尤正吉

國立臺北科技大學/機電學院/車輛工程系所/碩士(2011年)

https://doi.org/10.6841/NTUT.2011.00536

摘要

設置於懸吊桿件與車身之間的撓性橡膠接頭會因為受力而產生變形，進而會直接改變懸吊機構之運動幾何，影響車輛操控性。為探討此一現象，本研究建立小型車常用之雙A臂式懸吊系統之四分之一車懸吊數學模型，首先利用向量迴路法分析輪胎跳動時，未設置撓性橡膠接頭之懸吊系統與輪胎幾何的變化情形。接著考慮撓性橡膠接頭受力產生之變形量，藉由提出之懸吊機構運動靜力(Kinetostatic)數學模型，探討接頭撓性變形對於輪胎外傾角及前束角之影響，並利用ADAMS/CAR進行模擬驗證，分析結果發現考量撓性變形之數學模型能更正確的描寫懸吊機構的運動，並可以評估撓性接頭受力時對於車輛操控性之影響。

關鍵字

向量迴路法 ； 撓性橡膠接頭 ； ADAMS ； 運動靜力 ； 操控性

並列摘要

Flexible bush joints installed between control arm of suspension and vehicle body will deform because of the external force, which change the suspension geometry and then affect vehicle handing. Firstly, this paper establishes a mathematical model of double wishbone suspension system to analyze relationship between the suspension geometry and wheel travel by using closure equations. Then, this research evaluates the deformation of flexible bush joints due to wheel load and analyzes the camber angle and toe angle by the mechanism kinetostatic analysis. Finally, simulation of software Adams/Car is used to verify the analysis. The result shows that mathematical model can accurately describe the suspension kinematic and evaluate the influence of vehicle handling performance when flexible joints are forced.

並列關鍵字

Closure equations ； Flexible bush joints ； Adams ； Kinetostatic analysis ； Handling

參考文獻

[1] P. Morse, “Using K&C Measurements for Practical Suspension Tuning and Development,” SAE Technical paper, no. 2004-01-3547.

[6] J. Fenton, Handbook of Automotive Powertrains and Chassis Design. 1998.

[9] 鄭文龍，可變幾何懸吊系統之研究，碩士論文，國立台北科技大學車輛工程研究所，台北，2007。

[10] 許名凱，雙A臂式可變幾何懸吊之車輛動態分析，碩士論文，國立台北科技大學車輛工程研究所，台北，2009。

[12] S. Dzierzek, “Experiment-Based Modeling of Cylindrical Rubber Bushings for the Simulation of Wheel Suspension Dynamic Behavior,” SAE Technical paper, no. 2000-01-0095.