The　compressor　disk　is　one　of　the　key　parts　of　the　aeroengine.　Its　structure　and　strength　play　an　important　role　in　the　reliability　of　the　compressor.　Most　of　the　damage　are　caused　by　resonance　stress.　At　the　same　time,　the　dynamic　design　and　analysis　of　the　key　components　are　required　because　of　the　rotating　state.　When　the　compressor　disk　is　in　normal　operation,　the　disk　rotates　around　the　rotating　shaft　in　a　large　scale.　Centrifugal　inertia　force　will　affect　the　deformation　of　the　structure,　and　induce　a　certain　change　of　natural　frequency　when　compared　to　the　static　condition,　which　has　increased　complexity　to　modelling　and　numerical　calculation.　In　this　paper,　the　effect　of　dynamic　stiffening　on　the　vibration　characteristics　of　disc　is　studied.　In　order　to　derive　the　equations　of　motion,　Hamilton＇s　principle　is　used,　and　the　boundary　conditions　are　obtained　at　the　same　time.　We　studied　the　natural　frequency　of　the　isotropic　plate　and　laminate　plate　by　Ritz　method.　Using　the　popular　finite　element　analysis　software　ANSYS,　we　carry　on　simulation　computation　of　vibration　modes　on　a　certain　type　of　compressor　in　the　working　process.　Besides,　by　investigation　of　the　influence　of　structure　parameter　and　rotating　speed　on　the　forward　travelling　wave　and　back　travelling　wave,　we　studied　the　critical　speed　of　the　compressor　disk,　which　is　essential　in　the　rotator.　©　2018　Institute　of　Physics　Publishing.　All　rights　reserved.