The　dynamical　modeling,　multi-pulse　orbits　and　chaotic　dynamics　of　cantilevered　pipe　conveying　pulsating　fluid　with　harmonic　external　force　are　studied　using　the　energy-phase　method　for　the　first　time.　The　nonlinear　geometric　deformation　of　the　pipe　and　the　Kelvin　constitutive　relation　of　the　pipe　material　are　considered.　The　nonlinear　governing　equation　of　motion　for　cantilevered　pipe　conveying　pulsating　fluid　is　determined　using　Hamilton　principle.　The　four-dimensional　averaged　equation　in　the　case　of　primary　parametric　resonance-1/2　subharmonic　resonance　and　1:2　internal　resonance　is　obtained　by　directly　using　the　method　of　multiple　scales　and　the　Galerkin　approach　to　the　partial　differential　governing　equation　of　motion　for　cantilevered　pipe　conveying　pulsating　fluid.　From　the　averaged　equation,　the　normal　form　theory　is　used　to　find　the　explicit　formulas　of　normal　form.　Based　on　normal　form　obtained　here,　the　energy-phase　method　is　utilized　to　analyze　the　multi-pulse　global　bifurcations　and　chaotic　dynamics　of　cantilevered　pipe　conveying　pulsating　fluid.　The　analysis　of　global　dynamics　indicates　that　the　multi-pulse　jumping　orbits　exist　in　the　perturbed　phase　space　of　the　averaged　equation.　Based　on　the　averaged　equation,　the　chaotic　motions　and　the　multi-pulse　orbits　for　the　cantilevered　pipe　are　found　by　using　numerical　simulations.　The　results　described　above　indicate　the　existence　of　chaos　in　the　Smale　horseshoe　sense　for　cantilevered　pipe　conveying　pulsating　fluid.　It　has　been　concluded　that　it　is　dangerous　to　induce　the　chaotic　vibrations　of　the　pipes　conveying　pulsating　fluid　because　the　amplitudes　of　the　chaotic　vibrations　are　larger　than　those　of　the　periodic　motions.　(C)　2017　Elsevier　Masson　SAS.　All　rights　reserved.