Calculation And Research Of Hydrodvnamic Pressure Of Road Surface

In rainfall conditions, the rain of road surface accumulation mobiles along thedirection of pavement synthetic slops,formming a layer of cross flow water film.Hydrodynamic pressure will emerge after tire press water above road when the speed isvery high,the wheels will slide along surface(ie,”hydroplaning”)when hydrodynamicpressure reachs a certain value,resulting accident of skidding vehicles,rear-end,etc inrain conditions.In addition,the presence of hydrodynamic pressure make water intopavement structure,casuing the possibility of stripe between asphalt and aggregatematerials, increasing the aging trend,affecting the durability of the road,leading topremature destructin of road.The paper based on sciense project of Chongqing Municipal Education Commission—Research on Characteristics of Hdrodynamic Pressure because of Driving underAsphalt Concrete Pavemen Conditions. Studied key issues of calculation andcharacteristics.of hydrodynamic pressureFirst of all,establishing computational model of hydrodynamic pressure based onmomentum theorem under the condition that the depth of water film is smaller(＜2mm﹚and lager(≥2mm﹚, analyzing the relationship among hydrodynamic pressure、depthof water film and vehicle weight，and drawing the relationship between water skiingspeed and its impact factors.Second,selecting some type of model，setting the calculation parameters such astires ground area and vertical deformation，etc，reusing finite element software as todraw the result of hydrodynamic pressure under the conditions driving up some kinds ofdepths of water film (respectively4mm，6mm，8mm，10mm） by differentspeed(respectively60km/h，80km/h，100km/h，120km/h）. Analyzing the relationshipamong hydrodynamic pressure、depth of water film and speed.Finally,according to the result of hydrodynamic pressure to take action for speed、depth of water film and tire tread depth to reduce the adverse effecs of hydrodynamicpressure, and providing protection for vehicle safe driving...