The　traditional　models　for　VIVPEH　(piezoelectric　energy　harvesting　from　vortex-induced　vibration)　are　focused　on　a　circular　cylinder.　In　the　present　paper,　a　VIVPEH　model　was　built　to　solve　an　aero-electromechanical　coupling　problem　during　VIVPEH　with　different　cross-sectional　shapes.　The　model　was　verified　by　a　wind　tunnel　test.　One　key　benefit　of　the　present　model　is　that　the　region　from　the　initial　position　to　the　threshold　of　the　lock-in　region　along　the　voltage　time　history　curve　can　be　calculated　quite　accurately　compared　with　traditional　methods.　The　present　method　will　significantly　contribute　to　the　design　and　optimization　of　the　key　factors　of　VIVPEH,　e.g.,　the　bluff　body　shape　and　the　electrical　circuit.