多激勵(lì)作用下單、雙層圓柱殼聲振分析.pdf

1、華中科技大學(xué)碩士學(xué)位論文多激勵(lì)作用下單、雙層圓柱殼聲振分析姓名：高菊申請(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201101華中科技大學(xué)碩士學(xué)位論文華中科技大學(xué)碩士學(xué)位論文AbstractReinfcedsingledoublecylindricalshellsarecommonstructuresinprojects.Thispassageutilizescylindricalshellstosimulateshi

2、pcabinsstudiesvibrationnoiserelatedissuesofthem.Thefcesgeneratedbytheinternalmachineryequipmentsinspiretheinternalcylindricalshellmainlythroughthetransferofbasesfloatingraftsotherstructures.Thecontactbetweenthesestructur

3、estheshellcannotbesimplysimulatedbyasinglepoint.Itisusuallyinthefmoflinesfaces.Therefeindertobetterutilizethecylindricalshelltosimulatetherealstructurethispaperwillfocusonthevibrationsoundradiationofreinfcedsingledoublec

4、ylindricalshellsundermultifces.Therearetwotransmissionpathsbetweentheinneroutershellsofdoublecylindricalshellthepathoftheconnectionstructurethepathoftheflowfield.Toundersttheinfluencesofvibrationacousticradiationcausedby

5、differentpathshelpsindealingwithmecomplexproblems.TheFlggeequationofthinshellisappliedtodescribeshellmotion.Theeffectsofstiffenersaretreatedasreversefcesmomentsonthecylindricalshellsthenthecoupledvibrationequationissolve

6、d.Itassumesthatthecylindricalshellmeetsthesimplysupptedboundaryconditiontheshelldisplacementsinthreedirectionsareexpressedinthedoubleseriesfmalongthelongitudinalcircumferentialmodalexpansion.Withthedisplacementstresscont

7、inuityconditionsthedynamicreactionfcesoftheringribslongitudinalribsannularplatesarerepresentedbythedisplacementsoftheshell.Thenthedynamicreactionfcesaresubstitutedintothevibrationequation.Theeticalresultsofradialquadrati

8、cvelocityradiatedpowerradiationefficiencyarepresented.Thispaperdiscussesthetransferacteristicsofdoublecylindricalshellthevibrationsoundradiationofcylindricalshellunderexcitationoftheradialtangentialaxialsinglepointfcesax