Based on the sound-generating charateristics of smooth tread,ribbed patterns and block patterns of tires,the original sound-generating model was revised,a physical model suitable for sound-generating test of tire with non-small block patterns was proposed,the relative programmes BPTNS and BPODS were worked out,and the accuracy of the model was confirmed by the simulation test.

According to the pattern shape and the pattern block stiffness, the extracting method of pattern block mold profile is discussed.

The pattern of the tyre of agricultural vehicles has to fit in with the inclement working situations of the vehicles,which brings some difficulty to the pattern block mold design of the tyre.

Study on distortion measuring system for tire tread block and carcass under stresses;

The results showed that the higher the vehicle speed,the lower the inflation pressure of tire and the higher the density of tread blocks,the greater the sound levels of the noise from tread bolcks;the larger the volume of tread grooves,and the higher speed and load of vehicle,the greater the sound levels of the noise from tread grooves.