水下結(jié)構(gòu)流固耦合及聲輻射數(shù)值方法研究.pdf

1、華中科技大學(xué)碩士學(xué)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(qǐng)學(xué)位級(jí)別：碩士專業(yè)：船舶與海洋結(jié)構(gòu)物設(shè)計(jì)制造指導(dǎo)教師：陳美霞20090518華中科技大學(xué)碩士學(xué)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