Influence of Multiharmonics Excitation on Rattle Noise in Automotive Gearboxes

Figure 3

Time response histories of the idle gear for 𝑟=0.65 and 𝑗=8. Upper and lower sinusoidal curves correspond to the motion of the driving gear teeth separated by constant clearance.

(a) 3 impacts and permanent contact phase

(b) Periodic response with one impact per period

(c) Chaotic response

(d) Periodic response with two impacts per period