Initial　geometric　imperfections　are　bound　to　arise　during　a　structure＇s　service　life　or　could　emerge　during　the　fabrication　process.　The　exact　influence　of　these　geometric　imperfections　on　the　thermally-induced　vibrations　of　the　structure　remains　uncertain.　This　study　represents　the　first　endeavor　to　conduct　a　sensitivity　analysis　of　geometric　imperfections　in　the　nonlinear　vibration　responses　of　laminated　beams　subjected　to　thermal　shock.　Considering　uncoupled　thermoelasticity　theory,　the　temperature　distribution　is　obtained　using　a　one-dimensional　Fourier-type　transient　heat　conduction　equation,　and　a　nonlinear　dynamic　beam　model　accounting　for　initial　geometric　imperfections　is　developed　based　on　the　first-order　shear　deformation　theory,　Lagrange　method,　and　Ritz　method.　An　exact　solution　is　implemented　to　capture　the　temporal　temperature　profile　along　the　thickness　of　a　beam　subjected　to　a　thermal　boundary　condition　of　the　first　kind　(constant　wall　temperature).　The　sensitivity　of　various　geometric　imperfections　to　the　nonlinear　vibrations　of　laminated　beams　under　thermal　shocks　is　obtained　using　the　Newmark　scheme　and　Newton-Raphson　iterative　technique.　A　series　of　parametric　studies　is　conducted　to　reveal　the　effects　of　different　parameters　on　the　nonlinear　thermally　induced　vibration　responses　of　the　beams.　Thermally　induced　vibration　is　shown　to　be　sensitive　to　the　initial　geometric　imperfections.