1、華中科技大學碩士學位論文水下結(jié)構(gòu)流固耦合及聲輻射數(shù)值方法研究姓名：陳偉申請學位級別：碩士專業(yè)：船舶與海洋結(jié)構(gòu)物設(shè)計制造指導(dǎo)教師：陳美霞20090518華中科技大學碩士學位論文IIAbstractThevibrationsoundradiationproblemofasubmarineisinfactafluidsolidcouplingproblem.Anexcitedunderwaterstructurewillvibrateprod

2、uceacousticfieldinfluidtheacousticfieldreactsonthestructuresimultaneously.Thereisstrongcouplingbetweenthestructure’ssurfacewater.Thereferesearchonfluidsolidcouplingisofengineeringsignificancefevaluatingthevibrationsoundr

3、adiationperfmanceofasubmarine.Fluidsolidcouplingproblemisstudiedinbothphysicscodinatemodecodinatewithnumericalmethodsinthispaper.Inphysicscodinateanewmethodbasedonfiniteelementtheyboundaryelementtheyisdevelopedtocomputet

4、hevibrationsoundradiationofaunderwaterstructure.Firstlythestructure’smassmatrixstiffnessmatrixisgotbydealingwiththestructurewithFEMsoftwareANSYS.SecondlytheouterfluidfieldistreatedwithBEM，thestructure’sadditionalmassmatr

5、ixadditionaldampingmatrixarecomputedbyMATLABprogram.Displacementresponseisthengotbysolvingthedynamicequationtakingaccountintoadditionalmatriceswithprogram.SoundradiationiscalculatedbyacousticsoftwareSYSNOISEwiththedispla

6、cementresponseasboundaryconditionatlast.Thecalculationtellsthatthismethodwthafurtherresearch.Inmodecodinatecouplingmodesofacylindricalshelliscalculatedwithnumericalsoftwaresinanewwaythemodaladditionalmassisgot.Therelatio