Effects　of　design　parameters　characterizing　bridge　flutter　sensitivity　on　flutter　critical　wiiul　speed　am　important　tools　fur　exploring　briilge　Duller　iitcchanism　aiul　improving　flutter　[lerformance.　Here,　In　assist　designers　in　efficiently　am!　accurately　obtaining　influence　laws　of　structural　dynamic　characteristics　and　flutter　derivatives　on　flu　Hit　performance　(if　large-span　bridge　during　design　phase,　a　bridge　3-D　flu　Hit　sensitivity　analysis　utclhml　based　on　©　2024　Chinese　Vibration　Engineering　Society.　All　rights　reserved.