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Optimal Design of Front Suspention Guide Mechanism and Researches on the Handling Stability of Vehicle

Author: ZuoJia
Tutor: TangYingShi
School: Hunan University
Course: Vehicle Engineering
Keywords: front independent air suspens ion guide mecha nis m wear performance ofhand ling optimization design
CLC: U463.33
Type: Master's thesis
Year: 2012
Downloads: 60
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Abstract


With the econo mic deve lopment of our country,environme nt, resources and roadsafety beca me a hot spots of today’s soc iety, these spots has become the promotefactor of stricter rele vant nationa l laws and regulations,especia lly for coachhierarchies index and passenger vehic le comfort require ment. These laws andregulations ha ve very important meaning, for they can promote our enterprise toincrease research fund ing, improve the quality of the production, and to ame lioratevehic le overload.Air spring was gradua lly introduced in China c oach makers, because it has goodnonlinear characteristics, stab le partia l frequenc y near the insta llation he ight, andbetter road friend liness. This paper first comb ining ADAMS virtua l simulationsoftware, to proceed the vehic le steering stability virtua l simulation experime nt andanalys is for a12meters grand tour bus equipped with front independent airsuspensio n, which is a sma ll batch manufacture of a co mpany.In the vehic le road test,this grand tour bus occurred proble ms of front tire serio us ly abrad ed and large wheelpositio ning parameters change range. Through the contrast of the simulation results,the ma in reason of caus ing serio us wear and tear of the tire ha ve founded, whichmaybe is the large cha nge of the fro nt independent air s uspens ion wheel track andwheel tread variatio n during the process of wheel hop.The thesis us ing ADAMS software built a simulation model of the passengervehic le, conducted snake-like simulation experime nts in accordance with GB andmade an contrastive ana lys is of the simulation data and the phys ical prototypeexperimenta l data, which demo nstrated the credibility of the vehic le simulation model.With the he lp of ADAMS/ins ight e xperime nt module, the thesis e xplored thesensitivity o f the hard spots of former independent a ir suspens io n. According to thesensitivity ana lys is results and the total ve hic le layo ut space require me nts, the thesisdetermined the design variab les and boundary conditions, and the former independentair suspens ion oriented institutions has been optimized. And the n, the thes is made theoptimized independent air suspens ion model replace the origina l front suspens ionmodel, made another paralle l whee l hop simulation experime nt, and madecomparative ana lysis of the curve after optimization before optimiza tion. The resultsshow that the beam variatio n of the former independent air suspens ion, front whee lca mber change and tread change have been significantly reduced and factors whichhave a major impact on tire wear are drastica lly reduced. Approved by phys ica l experiment, the result of optima l design of guidemecha nis m of the independent air suspens ion can solve the proble ms of serious wearand tear of the tire which exposed by sma ll batch manufacture process. meanwhile， italso speed up the process of techno logy deve lopment and reduce the cost of phys ica lexperiment. In conclusion, the optimization design method worth’s promoting andaccumulated the guidance experience of the whole body design according to the tests.

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive structural components > Travel System > Suspension
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