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1、兰大《结构力学》13春在线作业114spring13autumnbigorchid^structuralmechanics^13springonlinehomework1Totalscore:100testtime:一RadioexaminationJudgmentquestionRadioexaminationquestions(20questions,60points)1.figure48.TheshapeofthestructureMdiagramis()A.B.C.D.Fullmarks:32.figure36.Theaxialforce
2、ofrod1inthestructureis()A.0B.-ql/2A.-qlB.-2qlFullmarks:31..Fig.46thecriticalloadforthemaximumbendingmomentofthesectionCundertheactionofthemovingbeamis(KN)A.50B.40C.60D.80Fullmarks:32.inFigure40,theinfluencelineofthecrosssectionofstaticallydeterminatebeamCis()A.B.C.D.Fullmarks
3、:31.figure45therelativehorizontaldisplacementofthetwopointsofthestructureA(B)A.B.C.D.Fullmarks:32.inanycase,thesystemthataddsatwodollarbodytoageometricallyvariab1esystemisageometricsystemA.variableB.transientsC.isinvariantandwithoutredundantconstraintsD.invariant,therearetwor
4、edundantconstraintsHomeworkanswerdidnotupload,firstforeveryonetoreviewtheuse,ifyouneedtoanswerthespecificseemyregistrationnametofindperfectscore:3points3.whenthedynamicbalancemethodisusedtoperformdynamicanalysis,theinertiaforceA.doesn，treallyexistB.actuallyactsonaparticleC.ac
5、tuallyexists,butdoesnotactonparticlesD.verticalvibrationexists,andotherdirectionsdonotexistFullmarks:31.commonlyusedstructuraltypesofbarsinclude()A.beam,arch,bentandsoonB.beam,arch,rigidframe,etc.C.beam,arch,suspensionstructure,etc.D.beam,rigidframe,suspensionstructure,etc.Fu
6、llmarks:39.,figure124,whichcannotapplythedynamiccoefficientmethodtocalculatethedynamicdisplacementamplitudeA.B.c.D.Fullmarks:310..Thesystemwiththesameinternalforceanddisplacementdynamiccoefficientiscalculatedwhenthesystem(excludingthedistributionmassofbeam)iscalculatedinFigur
7、e117A.B.C.D.Fullmarks:311.figure59themostdisadvantageouspositionofthebeamtoproducethemaximumbendingmomentofthesectionKundermovingloadis()A.B.C.D.Fullmarks:310.figure49theaxialforceofthetrussa(asthetensionispositive)is()A.B.C.D.Fullmarks:313.,figure33,rangingfromthreehingedrig
8、idframeMBAisequalto()A.0.8Pa.(leftpull)B.0.8Pa(righthandpull)C.1.2Pa
