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With the continuous development of road transport vehicle - road coupling system interactions by more and more attention . Pavement is a measure of the quality of a major road driving performance , smooth road for vehicles to provide fast , safe, comfortable and economical driving environment , while reducing the damage to the vehicles on the roads and improve road performance and prolong the road life. By contrast , uneven pavement incentives , will make moving car vibrate. Car vibration dynamic load , it will not only cause car engine wear , damage, affect vehicle ride comfort , safety, but also on the mechanical behavior of pavement , accelerated pavement damage. Through theoretical analysis and reference measured data , the establishment of the sine function waveform road model , the model and determine the wavelength and amplitude ; draw on theoretical analysis of vehicle research sector , the establishment of incentive to consider the phase difference of about seven degrees of freedom vehicle model , through a multi- degree of freedom system complex modal theory, using Matlab programming , seeking counted in the left and right wheels incentives are different, different speeds , different wavelengths of the road model , the vehicle load capacity is not the same size and distribution of dynamic loads . Articles of the seven degrees of freedom vehicle model by calculation and analysis , the following conclusions : the given vehicle dynamic loads on the road with the road waveform proportional to the amplitude waveform ; waveform wavelength road , the vehicle speed and the load capacity of a significant dynamic load effects .
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