The　centrifugal　underwater　explosion　tests　and　corresponding　numerical　simulations　were　carried　out　to　study　the　laws　of　shock　wave　and　bubble　pulsation.　A　semiempirical　method　to　determine　JWL　state　equation　parameters　was　given.　The　influence　on　numerical　results　caused　by　factors　such　as　state　equation　of　water,　boundary　condition,　and　mesh　size　was　analyzed　by　comparing　with　the　centrifugal　underwater　explosion　test　results.　The　results　show　that　the　similarity　criterion　is　also　suitable　in　numerical　simulation;　the　shock　wave　peak　pressure　calculated　by　polynomial　state　equation　is　smaller　than　that　of　shock　state　equation.　However,　the　maximum　bubble　radius　and　the　pulsation　period　calculated　by　the　two　equations　are　almost　the　same.　The　maximum　bubble　radius　is　mainly　affected　by　the　boundary　simulating　the　test　model　box,　and　the　pulsation　period　is　mainly　affected　by　the　artificial　cutoff　boundary.　With　the　increase　of　standoff　distance　of　measuring　point,　the　mesh　size　required　for　the　numerical　calculation　decreases;　the　size　of　the　two-dimensional　model　is　recommended　to　take　1/30　approximate　to　1/10　explosion　radius.　In　three-dimensional　models,　when　mesh　size　is　2　times　larger　than　explosion　radius,　the　bubble　motion　change　in　the　second　pulsation　period　is　not　obvious.　When　mesh　size　is　smaller　than　1　time　explosive　radius,　the　full　period　of　bubble　pulsation　can　be　well　simulated,　but　calculation　errors　increase　slowly　and　computation　time　greatly　increases,　so　the　three-dimensional　mesh　size　is　suggested　to　take　the　charge　radius.　Shock　wave　peak　pressure　is　basically　unaffected　by　gravity.　As　the　gravity　increases,　the　bubble　maximum　radius　and　the　first　pulsation　period　both　decrease.