大工秋《工程力学(一)》在线作业（engineering mechanics work autumn (a) online homework ）

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1、大工13秋《工程力学(一)》在线作业3（Engineeringmechanicswork13autumn(a)onlinehomework3）Greatworks13autumn"EngineeringMechanics(1)"onlinehomework3Totalscore:100testtime:-testscores:82SinglequestionjudgmentFirst,radioquestions(10questions,60points)Score:42V1.cutsabeamorsinglerigidknot,equivalenttoremoving(a)ane

2、xcessconstraint.A.1B.2C.3D.4Thecorrectanswer:CFullScore:6points:6Inthe2.span,thesimplysupportedbeamattheendoftheconcentratedforceFistaken,andthemagnitudeoftheshearforceacrossthemiddlesectionofCis().A.F/2B.-F/2C.FD.isuncertainThecorrectanswer:DFullScore:6points:03.abouttheprincipleofvirtualwork

3、ofdeformablebodies,thefollowingstatementisincorrect.A.theexternalforcesystemmustbeabalancedforcesystemB.displacementmustsatisfytheconditionsofvirtualdisplacementC.forceanddisplacementarerelatedbetweenthetwostatesD.isapplicabletoanydeformablebodyofforcedeformationrelationThecorrectanswer:CFullS

4、core:6points:64.,themomentdistributionmethodisusedtocalculatethelateraldisplacementoftherigidframe,andthetransfercoefficientisequaltotheverticalsupportoftheuniformstraightrod.A.0B.0.5C.1D.-1Thecorrectanswer:DFullScore:6points:05.thereasonableaxisofthethreehingedarchisundertheactionofradialunif

5、ormload.A.arclineB.parabolaC.catenaryD.sinecurveThecorrectanswer:AFullScore:6points:66.thefollowingoptionsdonotbelongtothepremiseofthemultiplicationofthegraphtocalculatethedisplacement.TheA.barsectionisastraightrodwithequalsectionThephysicalparametersofeachrodsectionofB.areconstantAtleastoneof

6、theintegrandofC.isastraightlinefigureD.twointegrandarestraightlinesThecorrectanswer:DFullScore:6points:07.whenthesupportofthestaticallydeterminatestructuremoves.TheA.memberhasnodeformation,andthestructurehasnodisplacementTheB.memberhasnodeformation,andthestructurehasdisplacementTheC.memberhasd

7、eformationandnodisplacementofthestructureTheD.memberhasdeformation,andthestructurehasdisplacementThecorrectanswer:BFullScore:6points:6Whenthe8.symmetricstructureactsagainsttheforce,thesheardiagramofthestructureis(),andthemomentdiagram(.