車輛雨刷下壓力分佈模擬

Contact Pressure analysis for Vehicle Windshield Wiper

吳哲勛(Wu Zhe-Xun)

指導教授 ： 蔡建雄

國立屏東科技大學/工學院/車輛工程系所/碩士(2019年)

https://doi.org/10.6346/NPUST201900059

摘要

本研究使用有限元素法建立三維雨刷與擋風玻璃間的接觸壓力分析技術。車輛擋風玻璃為曲面，所以接觸壓力會受到攻擊角與玻璃拱高的影響，所以本文針對兩種車輛的玻璃，探討雨刷方向的拱高與攻擊角對壓力分佈影響。

計算結果顯示：三維雨刷接觸壓力模擬可以準確預測雨刷與玻璃間的接觸壓力，但電腦的計算時間相當長。本研究提出以玻璃拱高所建立的三維平台，可以較快速計算出零度攻擊角下的接觸壓力，與此拱高下的攻擊角與壓力的關係。此模式可用來評估擋風玻璃的接觸壓力分布，再配合二維刷式角的模擬可以建立玻璃刷拭品質的評估。此外，結果也顯示：對於無骨雨刷形式而言，在雨刷方向的接觸壓力有不均勻的特性，當雨刷攻擊角從12度到-6度之間，接觸壓力變化不大；但是當攻擊角從-6度變化到-12度時，低壓區接觸壓力逐漸變小，高壓區壓力逐漸變大，會造成刷片有S形狀產生。

關鍵字

雨刷壓力分佈 ； 玻璃曲率 ； 攻擊角 ； 刷拭角

並列摘要

In this study, the finite element method was used to establish the simulation technique for the contact pressure between the 3D wiper and the windshield. The windshield of the vehicle is curved, so the contact pressure is affected by the attack angle and the glass camber height. Therefore, this study discusses the influence of the camber height and the attack angle on the contact pressure distribution of the wiper direction for the glass of the two different vehicles.

The calculation results show that: 3D wiper contact pressure simulation can accurately predict the contact pressure between the wiper blade and the glass, but the calculation time of the computer is quite long. This study proposes that the 3D platform established by the glass camber height can quickly calculate the contact pressure under the zero-attack angle and the relationship between the attack angle and the pressure under the specific camber height.

This model can be used to evaluate the contact pressure distribution of the windshield and coupling the results of 2D wiping angle can be used to establish the wiping quality of the glass. In addition, the results also show: For the beam arm-type wiper, the contact pressure in the direction of the wiper has an uneven characteristic. When the wiper attack angle is between 12 degrees and -6 degrees, the contact pressure does not change much; but when the attack angle is changed from -6 degree to -12 degrees, the contact pressure in the low pressure region gradually becomes smaller, and the pressure in the high pressure region gradually becomes larger, which causes the S-shaped of the brush blade in the wiping duration.

並列關鍵字

wiper pressure distribution ； windshield curvature ； attack angle ； wiping angle

參考文獻

參考文獻

1. 黃東毅，2018，雨刷下壓力分佈模擬技術，碩士論文，國立屏東科技大學，車輛工程系。

2. 李欣豪，2017，無骨式雨刷彈片成形技術之研究，碩士論文，國立屏東科技大學，車輛工程系。

3. Wook Hyeon Kim, Tae Won Park , Jang Bom Chai, Sung Pil Jung ,Won Sun Chung, “Estimation of Contact Pressure of a Flat Wiper Blade by Dynamic Analysis”,韓國機械工程師學會論文集。

4. Regis Grenouillat, Christian Leblanc,2002,“Simulation of Mechanical Pressure in a Rubber-Glass Contact for Wiper Systems”,SAE TECHNICAL PAPER SERIES 2002-01-0798。