In　view　of　the　advantages　of　lightweight,　high　strength,　easy　cooling,　and　easy　assembly,　the　rod-fastened　rotor　is　widely　used　in　the　aeroengine　and　heavy　gas　turbine.　However,　because　of　assembly,　stress　relaxation,　material　creep,　and　other　reasons,　the　clamping　force　of　the　tie　rods　will　be　out　of　tune　during　the　long-term　operation　of　the　rotor.　The　detuning　of　the　clamping　force　of　the　tie　rods　not　only　affects　the　contact　stiffness　of　the　contact　interface　but　also　causes　the　rod-fastened　rotor　with　a　certain　residual　shaft　bow,　which　will　affect　the　dynamic　characteristics　of　the　rod-fastened　rotor.　Based　on　the　statistical　model　of　rough　surface　contact　(GW　contact　model),　this　paper　presents　a　method　to　calculate　the　equivalent　flexural　stiffness　of　rough　surface　considering　the　detuning　of　the　clamping　force　of　the　tie　rods　and　gives　the　calculation　method　of　the　residual　shaft　bow　deformation　of　the　rod-fastened　Jeffcott　rotor　with　detuning　of　the　tie　rods.　The　effect　of　the　preload,　the　rate　of　detuning　of　the　tie　rods,　the　number　of　detuning　tie　rods　on　the　natural　frequency,　and　the　response　of　residual　shaft　bow　of　the　rod-fastened　Jeffcott　rotor　at　a　certain　speed　are　investigated.　The　results　show　that　the　detuning　of　the　tie　rods　makes　the　flexural　stiffness　of　the　rotor　inconsistent　along　with　two　main　stiffness　directions　of　the　rotor,　which　makes　the　natural　frequency　of　the　rotor　divided　into　two.　The　negative　detuning　of　the　tie　rods　decreases　the　natural　frequency　of　the　rotor,　while　the　positive　detuning　of　the　tie　rods　increases　the　natural　frequency　of　the　rotor.　The　smaller　preload　or　the　larger　rate　of　detuning　of　the　tie　rods　makes　the　detuning　of　the　tie　rods　have　a　greater　influence　on　the　natural　frequency　of　the　rotor.　These　results　will　provide　a　theoretical　reference　for　the　dynamic　analysis　and　design　of　the　rod-fastened　rotor.　©　2021　Haoliang　Xu　et　al.