篇名 | 輪胎於濕路面之水滑風險分析 |
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卷期 | 10 |
並列篇名 | Hydroplaning Risk Analysis of Automotive Tires on Wet Roads |
作者 | 郭信川 、 沈偉倫 、 劉冠儀 |
頁次 | 023-040 |
關鍵字 | 輪胎 、 排水性 、 流固耦合 、 輪胎花紋 、 有限元素法 、 hydroplaning 、 fluid-structure interaction 、 tread pattern of tire 、 finite element method |
出刊日期 | 201306 |
車輛行駛於積水路面上,輪胎受水膜潤滑作用所造成流體動壓浮力,導致輪胎與路面間的摩擦係數下降,造成輪胎對路面之正向接觸力下降,輪胎產生水滑風險提升。本文以有限元素軟體LS-DYNA 建置輪胎於濕路面之排水性能模擬分析,針對195/65 R15 轎車輪胎之光頭胎紋及直溝胎紋,分別進行充氣與壓載及流固耦合排水性能模擬分析,光頭胎之水滑速度為77 km/hr,溝寬9mm 之二直溝胎為82.6 km/hr。模擬分析結果與2001 年Okano 與Koishi 得到實驗值之誤差分別為25%與19%,此結果顯示本文之有限元素分析模型進行輪胎於濕路面之水滑風險分析是合理且可行的。
When a car is driving on the wet road, the fluid dynamic-pressure buoyancy, which is induced from tires being affected by water film, would decrease coefficient of friction between tires and the road, and as soon as the normal contact force of tires against roads approaches zero, tires would cause hydroplaning, which would make driving extremely dangerous, so that it is crucial for vehicle and tire manufacturers to study how to enhance tread’s capability of water-expulsion. In this study, we conducted the simulation of tread’s capability of water-expulsion with the Finite Element software LS-DYNA, focusing on smooth pattern and two longitudinal groves pattern of 195/65 R15 tires. We adopt two stages, inflating, pressure, and water-expulsion for hydroplaning simulation. The results show that the hydroplaning speed are 77km/hr for a tire with smooth pattern, the two-longitudinal-grovespattern tread with 9mm width having 82.6km/hr, respectively. Their error values are 25% and 19% of the experimental results conducted by Okano and Koishi in 2001, and it shows that the Finite Element analysis model on wet-pavement hydroplaning risk analysis for automotive tires in this study is feasible.