简介：Tohaveaclearerpictureofmechanismsresponsibleforthedeviationoftropicalcyclone(tobesimplifiedasTChereafter)tracks,thecurrentworkassumestheTCasacircularvortexwitharadiusofR.AgeneralmotionequationofTCisthendeterminedbyaveragingitshorizontalmotionequationoverthesentireregionofTC.Inthemeantime,withthemovingtrackofTCassumedasacharacteristicarc,thecurvatureequationisderivedforthetrackofmovementandpatternsofitsdeviationduetoTCstructureandvariationarediscussed.Theresultshowsthatthescale,size,maximumwindspeedandradiusarefactorscausingthedeviationofTCtracks.Inaddition,asymmetricstructureofTCisalsoimportantforthedeviationoftracks.Theresults,achievedwithhypothesis,agreewithfactsinsomecasesbutdisagreewiththeminothers,whicharetobeverifiedwithmoreobservationsornumericalsimulations.

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简介：Afundamentaltheoryfortheanalysisofresidualweldingstressesanddeformationbasedontheinherentstraindistributionalongtheweldedjointisintroduced.Distributionofinherentstrainsandlongitudinalresidualstressesinmediumthicknessplateweldmentiscalculatedandanalyzed.Anewmethodofcalculatinginherentstrainsandlongitudinalresidualstressesisproposed.