6Litvin F. Reduction of noise of loaded and unloaded misalignedgear drives [ J ]. Computer Methods in Applied Mechanksand Engineerins, 2006,195(41- 43) :5523 -5536.
7Li S. Effect of addendum on contact strength, bending strengthand basic performance parameters of a pair of spur gears [ J ].Mechanism and Machine Theory, 2008,4.3(12) :1557- 1584.
8Li S. Effects of machining errors, assembly errors and tooth mod-ifications on loading capacity, load-sharing ratio and transmissionerror of a pair of spur gears[ J ]. Mechanism and Machine The-ory, 2007,42 (6):698 - 726.
9Imrek H, Duzcuoglu H. Relation between wear and tooth widthmodification in spur gears [ J ]. Wear, 2007,262 ( 3 - 4 ) : 390-394.
10Kahraman A, Singh B. Interactions between time-varying meshstiffness and clearance non-linearities in a geared system [ J ].Journal of Sound and Vibration, 1991,146( 1 ) :135 - 156.
