To　realize　the　anti-fatigue　design　of　offshore　wind　turbine　support　structures，a　whole-local　modeling-based　fatigue　analysis　method　was　proposed.　A　detailed　finite　element　model　was　established　for　the　local　hot　spot　regions.　On　the　basis　of　the　IIW　specification，high-precision　hexahedral　solid　elements　were　utilized　for　discretization，whereas　beam　elements　were　used　to　discretize　non-critical　areas.　The　proposed　method　overcomes　the　deficiencies　of　previous　studies　employing　stress　influence　matrix，such　as　ignoring　the　displacement　of　the　entire　structure　and　making　it　difficult　to　apply　the　boundary　conditions.　Using　IEC　61400　standards，the　dynamic　behavior　and　loads　of　the　entire　turbine　were　calculated　and　a　fatigue　analysis　of　the　tripod　support　structure　of　an　offshore　wind　turbine　was　performed.　The　cumulative　damage　values　caused　by　various　load　conditions，wave　height　and　water　depth　are　compared　and　analyzed.　The　results　demonstrate　the　viability　and　superiority　of　the　proposed　whole-local　modeling　method　for　fatigue　analysis　of　offshore　wind　turbine　tripod　support　structures.　©　2024　Science　Press.　All　rights　reserved.