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1、FUNdaMENTALSofDesignTopic8Structures©2008AlexanderSlocum8-01/1/2008Structuresdiagonalbraceorincreasingthestiffnessofaplatebymakingitintoalaminate.TakeacloselookatabridgeorabuildingasitisbeingbuiltandcomparewhatyouseetothestructureofInfact,oneofthegreatestrisksinthedesignofalargecrane,automobi
2、le,ormachinetool.Whatcom-structuresisthatthedesireforcostsavingswillleadtoamonalitiesanddifferencesdoyouobserve?Manystruc-structurethatisstrongbutnotstiff.Acommonexampleturesmeettheirfunctionalrequirementsbytakingisthefloorofahouse,whichisstrong,butitbouncesadvantageoffundamentalprinciplessuc
3、hastheParallelandthingsrattlewhenyouwalkacrossit.AnotherAxisTheoremwhichmotivatesdesignerstoincreaseexampleisplasticlawnfurniturewhichcanbestrongstrengthorstiffnessbyplacingthemassawayfromthebutfeelswobbly.Inmachines,this“lawnfurnitureneutralaxis.Infact,inordertobecomegoodatdesign-effect”mean
4、sthatthestructureistoocompliantandingstructures,oranythingforthatmatter,youhavetowhenloadsareplacedonit,itbendsandsags.Thiscanbecomegoodatobservingstructures!1causebearingsandothercomponentstobecomeloadedinwaysinwhichtheywerenotintended.Thedesignprocessforastructureisjustlikethedesignprocessf
5、oranentiremachine:FunctionalAccordingly,thischapterwillfocusondesigningrequirementsmustbedefined,andthenDesignParame-structurestomeetfunctionalrequirements.Includedtersareenvisioned.Analysisprovidesinsighttowhatwillbeconsiderationforhowstructuresaremanufac-mightbethemostefficientdesign,buthis
6、tory(refer-turedandtheimplicationsfordesign.ences)oftenplaysanimportantroleincatalyzingideas.Therewillalwaysberisksassociatedwithstructuresasingeneralitisdesiredthattheybeaslightaspossible,atleastforairplanesandrobots.Andwheretherearerisks,theremustbecountermeasures,suchasaddinga1.Aspartofthi
7、sbook’scontinuingpursuitofpersonalhappiness,ifyouareinterestedinsomeone,butnotsurehowtoaskthemout,invitethemtogolookatstructureswithyou!Therearefewspectatorsportsasexcitingaslookingatthedetailsofbridgeconstruction,cranebooms,ortheerectionofst
