The　snap-through　behaviors　and　nonlinear　vibrations　are　investigated　for　a　bistable　composite　laminated　cantilever　shell　subjected　to　transversal　foundation　ex-citation　based　on　experimental　and　theoretical　approaches.An　improved　experimental　specimen　is　designed　in　order　to　satisfy　the　cantilever　support　boundary　condition,which　is　composed　of　an　asymmetric　region　and　a　symmetric　region.The　symmetric　region　of　the　experimental　specimen　is　entirely　clamped,which　is　rigidly　connected　to　an　elec-tromagnetic　shaker,while　the　asymmetric　region　remains　free　of　constraint.Different　motion　paths　are　realized　for　the　bistable　cantilever　shell　by　changing　the　input　signal　levels　of　the　electromagnetic　shaker,and　the　displacement　responses　of　the　shell　are　col-lected　by　the　laser　displacement　sensors.The　numerical　simulation　is　conducted　based　on　the　established　theoretical　model　of　the　bistable　composite　laminated　cantilever　shell,and　an　off-axis　three-dimensional　dynamic　snap-through　domain　is　obtained.The　numerical　solutions　are　in　good　agreement　with　the　experimental　results.The　nonlinear　stiffness　characteristics,dynamic　snap-through　domain,and　chaos　and　bifurcation　behaviors　of　the　shell　are　quantitatively　analyzed.Due　to　the　asymmetry　of　the　boundary　condition　and　the　shell,the　upper　stable-state　of　the　shell　exhibits　an　obvious　soft　spring　stiffness　characteristic,and　the　lower　stable-state　shows　a　linear　stiffness　characteristic　of　the　shell.