文档介绍：Available online at hanism
and
Machine Theory
Mechanism and Machine Theory 43 (2008) 934–963
ate/mechmt
Experimental investigation and FEM analysis of
resonance frequency behavior of three-dimensional,
thin-walled spur gears with a power-circulating test rig
Shuting Li *
Nabtesco Co. LTD, Oak-hills No. 202, Heki-cho 7028-2, TSU-shi, Mie-ken 514-1138, Japan
Received 11 August 2006; received in revised form 7 July 2007; accepted 25 July 2007
Available online 12 September 2007
Abstract
This paper is a fundamental study on resonance frequency behavior of three-dimensional, thin-walled spur gears from
experimental tests and finite element analyses. Firstly, ‘‘power-circulating form’’ test rig is built for vibration tests of the
thin-walled gears at the speed range 500–3000 rpm and then strain phase method is presented in this paper to identify the
resonance mode shapes of the thin-walled gears when they are running in plete resonance state. It is found that when
wall thickness of the gear is very thin, vibrations of the thin-walled gear are the 2nd, the 3rd, the 4th order bending vibra-
tions of the rim and the 2nd, the 3rd and the 4th bending vibrations of the web. When the wall thickness is increased, the
2nd, the 3rd and the 4th order bending vibrations of the web disappear and only the 2nd, the 3rd and the 4th order bending
vibrations of the rim are remained. Effects of gear wall thickness, teeth mesh stiffness and assembly errors on resonance
frequency behavior of the thin-walled gears are also investigated experimentally and peak speeds of the thin-walled gears
are measured. It is found that there are several ponents existing at the same peak speeds of the thin-walled
gears.
Torsional vibration frequencies of the test rig system are analyses by building an equivalent lump-mass model system.
Natural frequencies and mode shapes of the lump-mass model system are analyzed. It is found that calculated natural fre-
quencies of the equi