Friction Dynamics Modeling of Double Curvature Automotive Window Based on Equivalent Nonlinear Constraint

10.6567/IFToMM.14TH.WC.OS3.018

Wenfeng Zhu；Hui Zhou；Peng Li

Nonlinear constraint ； Sliding friction ； Dynamic ； Automotive window

Proceedings of the 14th IFToMM World Congress

14th-1（2015 / 10 / 23）

616 - 619

英文

Sliding friction has great influence on automotive window's NVH (Noise, Vibration and Harshness) performance. Because of window seal's viscoelastic material properties, as well as its complicate interference fitting to double curvature glass, window dynamics modeling and friction mechanism research has some challenges in nonlinear constraint construction and spatial motion path determination. Based on nonlinear stiffness spring equivalent model, nonmetal hyper-elastic seal constraints are successfully discretized by series of spring sets with reasonable nonlinear stiffness. By three dimensional geometrical modeling, spatial motion path of the large curved glass is quantitatively reconstructed so that its contact interaction with seals can be precisely retrieved. In addition with the mathematical derivation of lifting resistances and driving power motor applying, a new automotive window dynamics model is proposed and the mechanism of window sliding friction is numerically researched. A case study is presented to show its effectiveness in optimization of moving balance coefficient.