力法知識(shí)講解雙語(yǔ)

第七章力法ForceMethod§7-1概述Introduction一.超靜定結(jié)構(gòu)的靜力特征和幾何特征Thestaticand

geometricalfeaturesof

staticallyindependentstructures

(SIS)靜力特征:僅由靜力平衡方程不能求出所有內(nèi)力和反力.

Staticfeatures:

Internalforcesandreactionscannotbedeterminedonlyby

Staticequilibriumconditions

超靜定問(wèn)題的求解要同時(shí)考慮結(jié)構(gòu)的“變形、本構(gòu)、平衡”.Deformationandequilibriummustbeconsideredsimultaneously

幾何特征:有多余約束的幾何不變體系。Geometricalfeatures:stablesystemswithredundantrestraints.

與靜定結(jié)構(gòu)相比,超靜定結(jié)構(gòu)的優(yōu)點(diǎn)為T(mén)headvantagesofSIS:1.內(nèi)力分布均勻thedistributionofinternalforcesaredistributedmoreuniformly;2.抵抗破壞的能力強(qiáng)Moreresistancetofracture1.內(nèi)力與材料的物理性質(zhì)、截面的幾何形狀和尺寸有關(guān)。Theinternalforcesarerelatedwiththepropertiesofmaterials,theGeometricalformandsizesofthecross-sectionofthemembers二.超靜定結(jié)構(gòu)的性質(zhì)ThepropertiesofSIS2.溫度變化、支座移動(dòng)一般會(huì)產(chǎn)生內(nèi)力。Temperaturechange,movementsofsupportsusuallycauseinternalforces.1.力法forcemethod----以多余約束力作為基本未知量Takeredundantforcesasprimaryunknowns。2.位移法displacementmethod-以結(jié)點(diǎn)位移作為基本未知量.

Takejointdisplacementsasprimaryunknowns。三.超靜定結(jié)構(gòu)的計(jì)算方法Computationmethods3.混合法combinedmethod----以結(jié)點(diǎn)位移和多余約束力作為基本未知量.4.力矩分配法momentdistributionmethod----近似計(jì)算方法approximationmethod.力法等方法的基本思想theideaofforcemethod:1.找出未知問(wèn)題不能求解的原因findthereasonswhywecannotsolvetheproblem,2.將其化成會(huì)求解的問(wèn)題transformitintosolvableproblem,3.找出改造后的問(wèn)題與原問(wèn)題的差別findthedifferencebetweenthetransformedandoriginalproblems,4.消除差別后,改造后的問(wèn)題的解即為原問(wèn)題的解removingthedifference,thetransformedproblembecomessolvable.5.矩陣位移法matrixdisplacementmethod----結(jié)構(gòu)矩陣分析法之一.§7-2超靜定次數(shù)的確定Determinationofindeterminacy超靜定次數(shù)=多余約束個(gè)數(shù)=去除的多余約束數(shù)degreesof

indeterminacy＝

numberofredundantrestraints＝numberofreleasedrestraints.

幾次超靜定結(jié)構(gòu)?X比較法:與相近的靜定結(jié)構(gòu)相比,比靜定結(jié)構(gòu)多幾個(gè)約束即為幾次超靜定結(jié)構(gòu).X12X1X2力法基本體系不惟一Primarysystemofforcemethodisnotunique.若一個(gè)結(jié)構(gòu)有N個(gè)多余約束,則稱(chēng)其為N次超靜定結(jié)構(gòu)

Ifastructurehasnredundantrestraints,thenitiscalledSISofn-thdegreesofindeterminacy.X1X1X2X2X3X3X1X2X32.去除一個(gè)鉸支座或者去除一個(gè)單鉸相當(dāng)于去掉2個(gè)約束。Removingahingedsupportorasinglehingeisequivalenttoreleasing2restraints1.去掉一個(gè)鏈桿或切斷一個(gè)鏈桿相當(dāng)于去掉一個(gè)約束

Removingarollersupportorcuttingalinkortwo-forcememberisequivalenttoreleasingonerestraint3.去掉一個(gè)固定端支座或切斷一根彎曲桿相當(dāng)于去掉三個(gè)約束.Removingafixedsupportorcuttingoutaflexuralmemberisequivalenttorelease3restraints4.將剛結(jié)點(diǎn)變成鉸結(jié)點(diǎn)或?qū)⒐潭ǘ酥ё兂晒潭ㄣq支座相當(dāng)于去掉一個(gè)約束.Changingarigidjointof2memberendsintoahingedjointorchangingfixedsupportintoahingedsupport

isequivalenttorelease2restraints幾何可變體系不能作為基本體系一個(gè)無(wú)鉸封閉框有三個(gè)多余約束.Closedframe:3redundantrestraints(b嘗)一個(gè)紋超靜予定結(jié)貫構(gòu)可遵能有囑多種鉆形式睡的基本轎結(jié)構(gòu)瞇，不同副基本匪結(jié)構(gòu)楊帶來(lái)侮不同說(shuō)的計(jì)越算工僑作量。On舞e值SI師S煮ha沃s森di括ff鑼er融en抽t限pr裂im弱ar晨y溉st踏ru欄ct鳥(niǎo)ur垂e,消f潮ordi笑ff敵er康en鹿t剪pr竹im好ar要y寄st漿ru禿ct優(yōu)ur及e箱th迅e千co腐mp宵ut刻at歇io腳n竭qu戚an齒ti哲ty伴i喚s逢di宏ff病er尤en襯t.確定送超靜價(jià)定次時(shí)數(shù)小酸結(jié)su頃mm緒ar濤y：(c既)可變責(zé)體系僅不能滲作為續(xù)基本陡結(jié)構(gòu)un譯st哪ab友le閣s隨tr濟(jì)uc篩tu本re污c喝an駝n拴ot堪b口e乖se然rv享ed哲a朋s堪pr番im木ar云y弱st涂ru稅ct項(xiàng)ur菌e(a矛)基本槍方法ba稀si坡c梨me菌th耳od穿:減約燙束re芝le廢as瓦e慮re罰st亦ra蔥in倒ts基本使結(jié)構(gòu)指去份掉多批余約擔(dān)束后測(cè)的結(jié)倒構(gòu)Pr貫im唱ar壁y奇st扎ru午ct攝ur據(jù)e:腫st壁ru綢ct戰(zhàn)ur倚e忙af怠te瞞rRe沸mo贊vi桐ng腦t真he驕r駝ed壞un房誠(chéng)da勿nt腳r墳es暗tr河ai嫂nt識(shí)s（14次）(1次）(6次)(4次)(6次)(1很0次)§7跨-3力法慰的基倉(cāng)本概倡念Ba璃si亮c補(bǔ)co裝nc頌ep舅t童of捧F杏or臟ce榴m吼et脊ho脾d一.力法巴的基壤本概奔念Ba偷si緣瑞c誘co電nc宗ep膀t襖of羊F醉or俯ce糾m角et乏ho元d基本駕體系=基本枕結(jié)構(gòu)嫂＋基蟻本未敬知力各＋外膚力Pr旁im蘇ar必y卷sy咸st車(chē)em=p云ri弄ma需ry稅s匯tr主uc嘩tu卵re+un遲kn碗ow壤n旋fo深rc殼es+ex椅te秘rn孔al果f抵or鉛ce否s待解文的未遷知問(wèn)怎題pr另ob爸le捧m享to漠b換e碰so清lv鄭ed變形瞧條件de總fo廉rm交at橡io究n酷co員nd肆it許io影n在變慰形條友件成靠立條瞧件下,基本夸體系速的內(nèi)秩力和緊位移石與原儉結(jié)構(gòu)哲相同.鋪Un崖de曠r括th井e孫de勻fo桌rm從at級(jí)io像n染co弟nd惠it廢io恐n,th溜e剃in室te淡rn金al抖f薄or猴ce貍s平an滿(mǎn)d疏di薪sp陽(yáng)la京ce口me京nt券s爽of擔(dān)t兆he姑p潤(rùn)ri慨ma禮ry飛s院ys污te封m接ar嗎eid毛en座ti獄ca富ltoth炕at羊o矮f申or叼ig億in耐al厚s靈tr駝uc寺tu課re烈.力法唐基本警未知踏量pr社im聰ar廊y孕un篇kn寺ow這n使of避f凈or毀ce擾m杰et順ho冒d力法方程MPM1M力法普基本氣思路馳小結(jié)Su快mm舟ar保yof妙f度or屠ce擠m數(shù)et殺ho究d解除忍多余己約束春，轉(zhuǎn)詳化為佳靜定朋結(jié)構(gòu)械。多林余約靠束代科以多林余未茅知力——基本鞠未知凝力。Re求le擋as百e公re廉du取nd第an松t淺re曠st財(cái)ra算in花ts——風(fēng)st聰at免ic死al乎ly譽(yù)d芬et膠er組mi肥na燒te撿s島tr璃uc姻tu煉re課—巧—p陷ri詳ma擊ry冠u聾nk降no墨wn胳f撒or儀ce息s建立位移忠協(xié)調(diào)流條件——力法徹方程。de禿ve壓lo怠p講de頑fo猾rm朵at剝io巴n介co芒mp稈at讓ib影il辰it慕y(tǒng)侍co泛nd革it機(jī)io盈n-范--隸--但e繡qu丸at絮io砌ns輕o孕f轎fo匪rc籠e多me升th螞od從力街法方伐程解陶得基須本未對(duì)知力博，由疊加摸原理獲得賭結(jié)構(gòu)果內(nèi)力胖。De鬧te凝rm駕in幅e螺pr鎖im舊ar腦y輛un視kn往ow驚ns艱f際ro脖m緒fo卻rc顯e炭me濕th嚴(yán)od松c丹on襲di績(jī)ti住on鉗.De彩te媽rm奧in扮e笛in染te彩rn座al泛f盾or巴ce灑s壯by奮s河up劍er坐po貢si遍ti島on伐m羊et遼ho嫂d力法薯步驟pr趁oc坦ed友ur企eof刑f俘or奸ce銳m腐et旺ho鑼d:1.確定秩基本仁體系de漂te鑼rm扇in糖e兇pr只im蓋ar柿y櫻sy稅st遇em2.寫(xiě)出知位移湖條件,力法殊方程wr蠟it飾e詠ou憐t廚de市fo險(xiǎn)rm湖at晝io半nCo驅(qū)nd持it王io弱n滿(mǎn),窯de跡ve忌lo稅p蘋(píng)ca響n(yōu)o音ni次ca炮l溪eq反ua裹ti重on罩s周of筆f定or駁ce蘇m兵et接ho池d3.作單沃位彎來(lái)矩圖,荷載爺彎矩淚圖;著co閃ns燈tr辣uc源t仙Mo厭me迷ntDi馬ag活ra簡(jiǎn)ms酸c株au呆se激d瘦by堂u擱ni現(xiàn)t誓fo括rc券e順an虹d竿ex殃te息rn牧al斗f郵or德ce幕s4.求出碎系數(shù)言和自票由項(xiàng)fi診nd圍t修he檢c經(jīng)oe漠ff低ic篩ie暗nt湊s是an鋪d訊fr蹈eete糞rm夜s5.解力披法方慌程so組lv棗e枝ca帖no犁ni幫ca基l做eq英ua舅ti蝕on哪s6.疊加步法作晉彎矩遲圖co國(guó)ns句tr哄uc斬t鎖mo救me超nt適d巨ia拆gr嫌am神b顧ySu賓pe撿rp特os年it尚io削n們pr免in蛛ci讓pl匙e.§7乘-4力法益的典勸型方毀程Ca退no蟻ni蓮ca孔l座eq匆ua寶ti倉(cāng)on山s撓of您f臨or貍ce霸m治et戚ho叢dqllEI2EIqllEI2EIX1X2變形軍條件:力法畝的典泉型方齡程Ca把no及ni辱ca耕l費(fèi)eq筆ua材ti楚on它s肌of陸f區(qū)or差ce紛m量et家ho鳥(niǎo)dqllEI2EIqX1X2變形川條件:qX1=1X2=1--悶--力法抽的典匪型方究程Ca本no聚ni宵c(diǎn)a酷l劉eq汪ua北ti送on伯s譜of糊f礙or賽ce始m勻et把ho美d主系鐮數(shù)ma鹽in決c跑oe圈ff凈ic潑ie跳nt逃s>邁0付系今數(shù)se廉co括nd位ar愿y睡co榮ef纏fi位ci劫en輩ts自由隊(duì)項(xiàng)fr閱ee玩t踐er奶ms位移敗互等la鉛w且ofre茄ci呈pr捉oc映al雁d仰is蜻pl趴ac都em欄en雨ts柔度繪系數(shù)fl打ex夏ib反il土it內(nèi)y俱co抗ef您fi沾ci叨en種ts賊,藏th趨er障ef銳or壘e善fo躺rc漂e匙me頁(yè)th癢od拆--評(píng)-f雀le遣xi落bi穗li晨ty避m稅et香ho單dqllEI2EIqX1X2qX1=1X2=1M1M2MPM內(nèi)力飾分布找與剛度擠無(wú)關(guān)莫嗎?Is尖t辰hedi拘st怎ri葬bu價(jià)ti籮on愛(ài)o蒼f昏in既te構(gòu)r-na諸l蜘fo占rc饑es沫r師el稍at芬ed簡(jiǎn)t抄oth產(chǎn)e鵲ri巾gi錢(qián)di同ty矮?荷載逢作用奏下超豬靜定桌結(jié)構(gòu)作內(nèi)力產(chǎn)分布駝與剛緒度的絕餐對(duì)值簽無(wú)關(guān)偏只與穩(wěn)各桿總剛度狠的比疫值有老關(guān).th汽e啟d崖is溫tr溜ib陽(yáng)ut滑io響n(yōu)寒of黑i啟nt志er雅na戰(zhàn)l先f(wàn)o滴rc果esis赤r聰el耀at云edTo斥t妖he艦r產(chǎn)el回at時(shí)iv辦e貍ri稻gi吵di潮ty郵o酬f伶th惠e門(mén)me康mb濤er炮s,嶄b勒ut行n夢(mèng)otTo穩(wěn)t特he瓜a缸bs燃o(jì)l手ut濕e寬ri黑gi堤di材ty.qllEI2EIqX1X2Mq小結(jié)Su館mm多ar焦y:1.力法續(xù)的典樓型方余程是甘體系收的變戚形協(xié)章調(diào)方雁程Ca迫no調(diào)ni億ca烤l吼eq賣(mài)ua碑ti嫌on惕s籮of緒f枝or竟ce型m叨et梨ho蘿d麻ar劈燕e高eq脖ua折ti蒙on子s箱of直d客ef嫁or途ma柔t(yī)i今on擱c場(chǎng)om何pa仇ti叨bi劉li肆ty煌c苦on爽di它ti渾on芒s2.主系朋數(shù)恒督大于周零ma槐in漆c毛oe需ff獲ic柄ie禿nt眾s示ar廳e彎gr得ea腎t劇th鼓an加0陣,副系粥數(shù)滿(mǎn)齡足位歲移互牛等定納理se禍co含nd救ar壞y賓co影ef慣fi臺(tái)ci亭en像ts和s筐at俱is質(zhì)fy柔l草aw很o嗽f扎re傭ci待pr也oc狀al巷d攏is勁pl住ac腥em秀en爹ts3.柔度全系數(shù)淡是體貧系常過(guò)數(shù)fl效ex誼ib攔il壁it慢y鋸co捆ef抓fi更c(diǎn)i意en清ts貿(mào)a濫re玩c雅on偉st呈an紹ts叔o窮f游sy淺st性em4.荷載備作用蜜時(shí),內(nèi)力雷分布慢與剛哄度大絡(luò)小無(wú)甜關(guān),與各茶桿剛咽度比惡值有秒關(guān).荷載秀不變,調(diào)整稍各桿吃剛度價(jià)比可爆使內(nèi)心力重魚(yú)分布.th束edi鄉(xiāng)豐st疲ri房誠(chéng)bu圍ti棋on昏o惹f單in勁te勢(shì)rn短al伶f梅or刪ce善sis斯r霞el弄at率ed貞t陜o龜th擁e嬌re成la免ti犧ve威(喘st嫩if冒fn本es公s)你r宗ig傍id嫌it余y攤of攪t期he艇m暑em蜜be死rs車(chē),鋸bu咐t畏no督t底to斬t擾he蕩a豬bs結(jié)ol涼ut舞e依ri島gi弊di失ty汗(施st這if扔fn窯es怨s)嫂.嶺By碰r售eg軟ul艘at購(gòu)in哭g畏re徑la誕ti必ve股r帳ig藏id鮮it說(shuō)y亞we蒜c轎an灑r攜eg齊ul燃at愈e桃th攝e基di癥st迎ri案bu本ti系on使o狹f加in大te娘rn霸al郵f丘or樸ce叫s.例1.力法閑求解餅圖示東結(jié)構(gòu)死的M圖.Co嫌ns尤tr瓶uc輕t莫mo姻me且nt襖d掃ia轉(zhuǎn)gr吊am塞b虹y稻fo敢rc錢(qián)e秩me膊th爛od§7薄-5算例Ex蟲(chóng)am棕pl叫esl/2EIEIPl/2lX1PPX1=1MPM1So縮慧lu叫ti梳on縣:Ml/2EIEIPl/2lX1PPX1=1MPM1解:M解:PX1MPPM1X1=1另一偷解法an射ot桿he洗r驅(qū)so紀(jì)lu待ti偏onPX1=1M1X2=1M2M3X3=1PMPX1PX2X3X1=1X2=1X3=1PM1M2M3MPPX1X2X3例2.力法奇解圖嫩示結(jié)氧構(gòu),作M圖Co卸ns釋tr判uc湊tmo恒me訴nt嘩d鍬ia合gr授am瓣b崇y達(dá)fo寨rc位e腐me壓th犧od浮.so畢lu沉ti井on局:PllX1PX2X3兩端案固支月梁在孝豎向瘦荷載摸作用下勝?zèng)]有召水平熄反力.Th腎er繳ear姐e轎no活t紐奉ho諸ri戰(zhàn)zo廣nt悉al即r辰ea栗ct捉io遞nfo頁(yè)rc絮es促u(mài)事nd順er拴v啞er為ti婆ca遇l甜lo圖ad家s例3.力法筑解圖振示桁派架.C駱al伍cu搏la但te傷t膚he輛t憤ru蒙ss濱b牙y粗fo至rc樸e休me蒜th商od毯E唇A=輪co亭ns憤ta央nt.解so尿lu延ti洲on迷:PaaPPP00P00NPN111111P-P/2-P/2P/2P/2變形條件仍為:對(duì)嗎?解So套lu課ti路on：例4.求作命圖示帽梁的蠅彎矩惡圖Dr洪aw煮m燦om炕en旨t倆di蠻ag謎ra兔m場(chǎng)by答f怠or疾ce需m法et嚷ho放d.當(dāng)當(dāng)EI當(dāng)解：例5.求解圖示加勁梁。橫梁當(dāng)有無(wú)端下部膽鏈桿絡(luò)時(shí)梁趟內(nèi)最域大彎施矩之沒(méi)比：通過(guò)食改變訂連桿狡的剛溪度來(lái)調(diào)艘整梁漢內(nèi)彎虜矩分俱布.By涼c塊ha丸ng把in喘g佛re刊la擇ti感ve綱r獎(jiǎng)ig臺(tái)id籍it侮yWe諒c悅an符r噸eg添ul嫁at響e夫th村e(cuò)淋di罷st菌ri礦bu擋ti尾onOf懇in模te紋rn僑al禍f普or存ce魄s.當(dāng)令梁狗內(nèi)正障、負(fù)刮彎矩呆值相說(shuō)等可躁得(求解傲見(jiàn)后鄙）：當(dāng)梁的受力與兩跨連續(xù)梁相同。（同例4中）下側(cè)劑正彎繪矩為設(shè)基鳴本未演知力賊為X，則跨中切支座撓負(fù)彎吊矩為根據(jù)屋題意債正彎努矩等扒于負(fù)膜彎矩股，可伏得有了倍基本斑未知傘力，彈由典沾型方撒程可絕得無(wú)彎均矩情懶況判無(wú)別th驚e司ca徒se與s溉of介z關(guān)er南o譯mo練me浴nt季s不計(jì)甩軸向散變形,下述繼情況蔬無(wú)彎短矩,只有簽軸力.Ne狡gl情ec廉ti慈ng低a淹xi革al固d桂ef慈or禍ma枯ti腳on晴,律on墻ly好a茶xi窗al賺f誦or扮ce鼻s等ar赤is梨e竄in帶t薄he腿f(wàn)鈴ol距l(xiāng)o婚wi卸ng硬c姜as班es(1慎).集中晨荷載峽沿柱利軸作免用co奴nc正en門(mén)tr顯at蜂ed股f困or逃ce樂(lè)s飯ac響t彎al貴on乓e石ax拉is貿(mào)o系f蒸me千mb敗er省sP(2甚).等值琴反向痰共線(xiàn)漠集中規(guī)荷載診沿桿尾軸作暑用.A身pa勝ir擁o猶f攜co邪l(fā)l蛇in疏ea襪r,興e莖qu邊al概i腔n沙ma街gn廟it刻ud恨e,儉b職ut犬o開(kāi)pp冊(cè)os薦it奸e玩in折d折ir練ec倚ti孔o(hù)n姻l淺oa方ds硬a膨ct美a糊lo連ne賭a哲xi臘s皂of終a籌m麻em很be非r.PP(3碑).集中尋荷載女作用途在不春動(dòng)結(jié)枕點(diǎn)co貧nc旬en透tr末at胞ed勵(lì)f諷or舊ce己s天ac來(lái)t銷(xiāo)on扎a蠶n塞un棋mo埋va設(shè)bl括e幼jo劑in教tP可利丈用下牲面方戚法判朗斷:化成謹(jǐn)鉸接至體系建后,若能正平衡看外力,則原揀體系貴無(wú)彎損矩.Me屑th姻od蓋o煉f紛de妄te懲rm竹in糧at箏io奧n:筆c景on撥ve匆rt斜in跟g悲th擔(dān)e終st棟ru亦ct藥ur項(xiàng)e沃in愉to邪p耀in患-c傻on演ne疑ct癢ed乖s暢ys繩te盜m,兇i俘f濃ex精te竹rn覆al投f黑or題ce宜s傭ca芬n道be榮b殿al上an環(huán)ce炸d,便t市he忌n助no嘗m爪om脾en挑t乞ar跨is傻es罩.4.無(wú)彎激矩情其況判孔別th玻e槳de司te薪rm槽in涂at鐵io挨n齊次騎線(xiàn)性部方程分的系泳數(shù)組浴成的剪矩陣芽可逆,只有倒零解.Th潔e昆ma段tr萌ix干c吉om公po薪se煤d辟by扶f挑le湖xi有bi拐l(shuí)i世ty簡(jiǎn)c逢oe暫ff妨ic還ie揪nt工s逼is戶(hù)i暫nv扣er吩sa般bl芳e,稅th桂er固ef禽or芝e您o好nl撲y憐ze儉ro陸s活ol怒ut份io提n課ex果is字ts但.超靜叨定拱攻的計(jì)隙算Th栽e擾co錄mp撕ut旋at病io材n迫of飾s弓ta紫ti侮ca亮ll茄y摟in暗de鑄te用rm深in苗at別e蛙ar各chPPX1X1=1P通常越用數(shù)升值積遲分方夫法或表計(jì)算筑機(jī)計(jì)迫算Ge痛ne運(yùn)ra瓜ll秩y糾th辮ey旋c窯an司c坊al窯cu墾la傅te屆d筆by宏n餡um方er陳ic盛al孕m貌et蔽ho傷d導(dǎo)or儲(chǔ)b家y島co軍mp寺ut逝er.§7預(yù)-6對(duì)稱(chēng)蹦性利煩用Ut葵il僻iz兵at山io徹n皂of端s罪ym遇me屬tr落y(1往).對(duì)稱(chēng)無(wú)性的憐概念Co蛇nc課ep輝t臉of擴(kuò)s些ym給me蘭tr儀y對(duì)稱(chēng)繪結(jié)構(gòu):幾何歷形狀偏、支娛承情悅況、剛度溪分布對(duì)稱(chēng)堵的結(jié)鉆構(gòu).Sy交mm瞎et遞ri躬c律st應(yīng)ru觀ct孕ur筑es:陡st芳ru使ct慣ur痛es蹈w煙it秘h壇ge礦om芽et艇ry牌,預(yù)su巴pp漢or馳ts葵a色nd聰r階ig譯id糟it像y廳di惹st婦ri區(qū)bu究ti際on舍b邊ei驕ng界s主ym底me存tr前ic侄w朽it向h號(hào)re認(rèn)sp姜ec傭t滿(mǎn)to叼s潤(rùn)ym常me腿tr角y艷ax友is調(diào).對(duì)稱(chēng)蜘結(jié)構(gòu)Sy累mm圍et典ri叢c溜st嘩ru看ct橫ur殘es非對(duì)谷稱(chēng)結(jié)柴構(gòu)No遼n-沾sym扛me塑tr扛ic差s繼tr圾uc笑tu寸re美s支承現(xiàn)不對(duì)卻稱(chēng)剛度潤(rùn)不對(duì)席稱(chēng)幾何白對(duì)稱(chēng)支承覆對(duì)稱(chēng)剛度痕對(duì)稱(chēng)對(duì)稱(chēng)幣荷載sy按mm爸et國(guó)ri攤c同lo討ad湖s:方向猾和作招用點(diǎn)罪對(duì)稱(chēng)狡于對(duì)戶(hù)稱(chēng)軸法、大靈小相紅等的狠荷載.Lo尾ad事s災(zāi)wi丑th幸m啄ag切ni儲(chǔ)tu卻de勢(shì)s,晴d全ir跨ec雁ti春on霉s掌an衡d仔ac斧ti沖on標(biāo)p產(chǎn)oi耳nt隱s船be霜in傍g溝sy喉mm鏟et蒸ri惜c推wi粱th旬r逆es問(wèn)pe漏ct對(duì)t謠o潮sy鑰mm顛et搭ry耐a棟xi鑒s反對(duì)誼稱(chēng)荷棋載An溜ti籠sy色mm慢et播ri裝c崗lo去ad豬s:作用眉在對(duì)置稱(chēng)結(jié)口構(gòu)對(duì)棚稱(chēng)軸誰(shuí)兩側(cè),大小雖相等,作用菜點(diǎn)對(duì)喇稱(chēng),方向代反對(duì)滾稱(chēng)的退荷載Lo出ad仍s幼wi滾th徑m怨ag樓ni軋tu仔de變s,di盒re己ct牲io逐ns歐a爹nd傳a滲ct步io紛n柳po衛(wèi)in罪ts牌b皺ei廁ng陸a慚nt熟i-升sy疏mm獄et毛ri晶c保wi卸th熟r砍es請(qǐng)pe暈ct覆t左osy國(guó)mm閑et亦ry死a距xi漸s對(duì)稱(chēng)蕉荷載Sy匙mm礦et扣ri蜻clo留ad尿s反對(duì)部稱(chēng)荷綠載An應(yīng)ti鼻sy躲mm斗et輛ri倉(cāng)clo通ad體sPllMllPllEI=CllEI=CM下面桶這些燭荷載形是對(duì)稱(chēng),反對(duì)裝稱(chēng)荷賢載,還是一般似性荷企載?(2沸).選取蚊對(duì)稱(chēng)閉基本號(hào)結(jié)構(gòu),對(duì)稱(chēng)隙基本委未知尸量和賊反對(duì)粗稱(chēng)基束本未貼知量Th畜e日se斃le紡ct蜘io匹n練of商s仙ym儲(chǔ)me幕tr盞ic返p世ri言ma撈ry乖s檢tr怠uc糧tu業(yè)re薄,沒(méi)sy綁mm奴et肅ri范c喝an漠d桿an繳ti紀(jì)-s偶ym若me佳tr捆ic同p嗽ri繪ma便ry驗(yàn)u聾nk蜜no背wn舉sPEIEIEIPM1M2M3PMP典型弓方程哥分為部?jī)山MFo騎rc尿e鳴me鹽th干od照e青qu停at葉io皂ns合a將re撒d守ec灰om谷po裝se翻d秩in擋to才2尿s起et啞s:PP一組簡(jiǎn)只含紫對(duì)稱(chēng)縮慧未知默量on頌e本in陵vo吵lv殲es直o喚nl月y航sy眼mm忠et仿ri戒c地un興kn扎ow托ns祝,另一域組只低含反丘對(duì)稱(chēng)索未知筑量th逐e療se側(cè)co祥nd行i翼nv斷ol暖ve另s庸on妨ly技a斬nt開(kāi)i-誘sy壯mm秒et跪ri廚c恐un篇kn鮮ow尖nsPM1M2M3PMPPPEIEIEIPΔ3P=0，X3=0對(duì)稱(chēng)晴結(jié)構(gòu)愧在正殿對(duì)稱(chēng)喝荷載允作用漿下，其彎搭矩圖仗和軸糾力圖塵是正妥對(duì)稱(chēng)鏡的,剪力礎(chǔ)圖反嚷對(duì)稱(chēng)旬；變承形與虧位移株對(duì)稱(chēng).P對(duì)稱(chēng)肺荷載sy和mm摘et地ri混c富lo岡ad走s:Sy餓mm鋸et腥ri易c打st設(shè)ru晃ct除ur收es掛u際nd遵er盼s刻ym賠me吉tr映ic液l帳oa陰ds移:促M(fèi)-衡di帽ag茂ra弦m,登FN-d棟ia例gr鬼am嶄,傍de螞fo銜r(shí)m稿at縫io緞n壺an慮d鋤di賭sp豬la必ce箏me速nt臟s串a(chǎn)r鹽e樣sy垂mm宋et觀ri指c;建b綱utFS-d愿ia團(tuán)gr紐奉am豎i慮s主an消ti萌-s旱ym矛me押tr橫ic素.PM1M2M3PMPPX1=照X2=0對(duì)稱(chēng)贏結(jié)構(gòu)矛在反鍋正對(duì)瘋稱(chēng)荷濾載作根用下紹，其彎請(qǐng)矩圖持和軸窩力圖遣是反鑒正對(duì)雄稱(chēng)的,剪力自圖對(duì)種稱(chēng)；蘿變形膀與位槳移反偏對(duì)稱(chēng).EIPEIEIPP反正擊對(duì)稱(chēng)仰荷載An君ti它sy糠mm殿et賄ri唉c先lo滔ad隙s:Sy寫(xiě)mm墳et控ri井c陰st調(diào)ru巾ct笑ur漠es倘u彩nd折er郵a息nt擋i-鄙sy舒mm障et疲ri汽c駁lo晃ad憲s:艙M桑-d僻ia倒gr等am擺,車(chē)FN-d雜ia省gr干am循,場(chǎng)de丘fo識(shí)rm侍at直io島n可an雹d伙di衡sp床la字ce谷me慘nt膛s沸ar忙e資an及ti陪-s越y(tǒng)m潛me研tr春ic堤;bu干t始FS-d慢ia狡gr逗am熔i繼s竄sy盈mm座et長(zhǎng)ri滴c.(3滑).取半輕結(jié)構(gòu)孝計(jì)算Se懂le頃ct樸a緣瑞h名al妄f尿st哪ru堅(jiān)ct爆ur企e園to敘a洗na纖ly驗(yàn)zeA.奇數(shù)舉跨結(jié)羨構(gòu)Fr貿(mào)am策es分w澇it糖h查od慣d-傅nu摧mb育er甜s扁pa郊nsPEIEIEIP對(duì)稱(chēng)艦荷載名作用Un眨de醒r勻sy夜mm隸et辜ri習(xí)c辭lo窯ad逗s:P半結(jié)建構(gòu)PEIEIEIP反對(duì)工稱(chēng)荷玻載Un歸de債r肉an襲ti癢-s旺ym紗me樂(lè)tr往ic貧l僚oa雷ds:P半結(jié)貧構(gòu)PEIEIEIPPPEIEIEIPPB.偶數(shù)坊跨結(jié)窩構(gòu)Fr租am致es潔w中it貴h奪od刷d-匆nu驚mb云er野s解pa捏nsPEIEIEIPEIPPEIEIEIPEIEIPEI/2PEI/2PEI/2PEI/2A.奇數(shù)悼跨結(jié)移構(gòu)Fr銹am噸es妹w家it訊h刊od蛛d-折nu斧mb滲er蛙s半pa霞ns對(duì)稱(chēng)貿(mào)荷載焦作用Un溫de刃r濁sy書(shū)mm據(jù)et紛ri嚇c桃lo斗ad港s:反對(duì)芽稱(chēng)荷跌載Un姐de繼r喘an賢ti柿-sy著mm嘉et棚ri晶c晨lo豬ad就s:對(duì)稱(chēng)悅荷載乏作用Un惕de東r啟sy奮mm隙et露ri治c透lo掘ad示s:反對(duì)壩稱(chēng)荷少載Un褲de駁r魔an昂ti劈燕-sy撥mm順et杠ri薦c卵lo質(zhì)ad星s:PEIEIEIPPPEIEIEIPPPEIEIEIPEIPPEIEIEIPEIEIPEI/2練習(xí):EIEIEIPPEIEIEIPEIPEIEIEIEIEIEIEIP/2PEIEIEIEIEI/2P/2練習(xí):EI=CPqqPPqqP/2P/2P/2qqqEx僚am鋸pl網(wǎng)e例.作圖乎示梁艷彎矩梯圖Dr選aw抄M川-d建ia立gr晴am奏o疏f暴th眾e講be窯amPl/2l/2EIP/2P/2解:So娘lu留ti藏on欠:X3=0X2=0M11MPP/2P/2Pl/4Pl/4MPPl/8Pl/8解So拾l(fā)u洽ti石on：11144EI＝d11800EIP＝D15.12X＝－P11MXMM＋＝例:求圖良示結(jié)閑構(gòu)的遺彎矩陸圖Co息ns翁tr庸uc巾t洲M-嶄di旺ag更ra否m次of暫t怖he棄f將ol幼lo眠wi司ngRi頭gi個(gè)d愈fr庫(kù)am立e,EI=c晚on炕st債an定t。PPEI=CllllPPX1X1=1lM1MPPPlMPPlPl冒/2PlPl/2解:例1:求圖戰(zhàn)示結(jié)刮構(gòu)的響彎矩檢圖Dr桃aw宴M根-d猜ia耳gr飯am社o揀f批th味e液st公ru幣ct至ur姐e,EI=c參on租st秀an之t。例2:作圖紫示對(duì)拿稱(chēng)結(jié)陽(yáng)構(gòu)的件彎矩調(diào)圖Dr膽aw奇M煉-d頌ia輝gr已a(bǔ)m解:P2EIlllEIEIEIEIP/2P/2P/2P/2+=P/2EIEIEI+=P/4P/4P/4P/4P/4X1P/4l/2X1=1M1MPPl/4P/4M3Pl/28P/4Pl/7Pl/73Pl/28Pl宅/73Pl/28Pl/73Pl/282Pl/73Pl/14例3:作圖違示對(duì)所稱(chēng)結(jié)毅構(gòu)的贈(zèng)彎矩必圖Co頭ns竄tr滾uc種t根M-勵(lì)di號(hào)ag腦ra杏m解:PPEI=CllllPP/2X1P/2M11X1=1MPPl/2P/2M3Pl/8P/2Pl/8Pl/8Pl/8Pl/8Pl/83Pl/8例4：求紛作圖收示圓拐環(huán)的磚彎矩荒圖,Co強(qiáng)ns要tr澡uc殊t賣(mài)M-狠di輸ag膨ra佩mof厚t暮he姜r攪in釀gEI=常數(shù)呀。解：取結(jié)妨構(gòu)的1/常4分析若只勵(lì)考慮探彎矩糞對(duì)位所移的恰影響害，有嘗：例5.試用虜對(duì)稱(chēng)刺性對(duì)蒙結(jié)構(gòu)傳進(jìn)行餐簡(jiǎn)化閱。EI為常漲數(shù)。Si郵mp奏l(xiāng)i漢fy恐a膏na銹ly司ti虧ca手l榜mo漫de起lsP/2P/2P/2P/2I/2I/2P/2P/2I/2方法1PP/2P/2P/4P/4P/4I/2P/4P/4P/4P/4I/2P/4P/4P/4I/2P/4I/2P/4P方法2PP/2P/2P/4P/2P/4P/4P/2P/4P/4P/2P/4P/4P/2P/4P/4P/4P/4P/4I/2P/4P/4P/4I/2P/4I/2P§7限-7超靜革定結(jié)儲(chǔ)構(gòu)的膀位移葡計(jì)算Co丈mp狹ut火at有io舉n機(jī)of孕d鑰is敢pl剩ac太em紙en里ts堅(jiān)o折f織st突at游ic筋al驚ly椅i輩nd昆et勾er參mi浪na京te賓s棚tr攏uc撲tu斃re掠s思路id列ea：將唉超靜奴定位到移計(jì)續(xù)算轉(zhuǎn)墻換為楚靜定渾位移串計(jì)算Tr著an律sf加or鋒m鼓th添eco鐵mp召u(mài)t罪at根io骨n賄of隙d兄is陶pl臺(tái)ac育em遮en惜ts惰o掠f橋st雖at聚ic鈴al辰ly醋i心nd扣et廈er憤mi夕na翅t(yī)e拉s餓tr偽uc臘tu正re辦s肚in錢(qián)to犁t澇he計(jì)c約om煎pu近ta悉ti問(wèn)on頌o非f趴di吃sp短la吳ce今me尊nt寫(xiě)s未of樂(lè)s桃ta孩ti鐮ca瓜ll滲y昨de也te美rm帶in狡at究e枝st歇ru罵ct李ur薯es超靜旅定位靈移狀怪態(tài)適＝綢基本排結(jié)構(gòu)著＋輸外閘載＋夫多著余力快引性起的聞位移微狀態(tài)Th獸edi墻sp朽l(xiāng)a櫻ce蠟me譽(yù)nt愚s繼ta訴te啄o特f課st區(qū)at辰ic將al蠢ly倍i炎nd曉et覆er卵mi他na費(fèi)te板s瞞tr酬uc緒tu瞞re貼s除is叼c杠om愧pl遞et倍el杰y勇id幼en冠ti新ca偉l廚to溜t傳he恐d谷is狠pl胃ac照em淋en茫t蜘st約at踐e砌of客t巖he暫p嚼ri巴ma早ry酷s那tr淹uc息tu舍re痛u欣nd笑er齊e挺xt律er墓na睜l游lo貼ad安s夜an隆d據(jù)re昆du沙nd目an斷t市fo任rc太es化.因此形可以婆選亮基本掌結(jié)構(gòu)悠（靜眠定結(jié)言構(gòu)）汁為研矮究對(duì)策象，配而外炎載＋辨多袋余力圾統(tǒng)鄭一看謹(jǐn)成外近載。We苗c熱an階s溜el熟ec屢tpr句im輔ar悟y紋st較ru荷ct在ur曬e阿(s怎ta泰ti棋ca轎ll致y饒de宏te瓜rm在in忠at腐e托st減ru雜ct蕉ur訓(xùn)es乎)女a(chǎn)萬(wàn)s合ob銳je解ct錫t盤(pán)o紐奉an壩al丹yz喂e,糧a庸nd壤l撲oo阻k請(qǐng)at暢t妹he北o街ri蘿gi行na洞l婦ex牽te境rn掩al偵l嶺oa洪ds距a紀(jì)nd追r耕ed朽un織da重nt桌f排or以ce閑s采as砍g卸en孫er府a(chǎn)l幟iz雷ed傅e本xt篩er美na互l刪fo坡rc愧es衰.求A截面殘轉(zhuǎn)角De援te偽rm嚇in勝e帖th膽e器ro侵ta霧ti個(gè)on辜o(jì)湊f擾se醫(yī)ct賭io借n合AqllEI2EIAX2X1AqMM1MiqllEI2EIAX2X1AqMM1MiM1Mi單位塔荷載伶法求硬超靜岡定結(jié)釘構(gòu)位擋移時(shí),單位喜力可席加在任吧意力謝法基際本結(jié)沫構(gòu)上Wh錢(qián)en煤u跡si扯ng拖u拘ni這t貿(mào)lo看adme進(jìn)th垂od斜to循d陳et巨er構(gòu)mi摩ne旨d鏡is敬pl僅ac棟em去en慈ts頸,菜un歐itfo依rc控e跪ma新y線(xiàn)be掏a還pp括li臺(tái)ed艷o毯n繡an良y降pr弱im尼ar慎yst煌ru位ct戰(zhàn)ur顯e.求A截面去轉(zhuǎn)角De柄te累rm段in乏e離th稈e忘ro答ta唱ti嗚on傷o夜f姨se狠ct網(wǎng)io架n織A§7品-8最后揭內(nèi)力功圖的報(bào)校核Th趙e鏈ch晃ec燭ki久ng濃o競(jìng)f部fi責(zé)na垃l公in噴te地rn拘al糧f銷(xiāo)or援ce噸d尿ia哈gr趕am煩s1、平矛衡條兄件校累核Th舒e銅ch譜ec斬ki想ng母o纏f插e(cuò)q溪ui笑li近br魯iu寺m攏co堪nd檢it輩io而nsqllEI2EIAM從結(jié)但構(gòu)中唇取隔華離體篇，驗(yàn)殲證平剖衡條妖件是忌否滿(mǎn)肚足Is完ol苗at瞞e仍fr姿ee楚b撤od能ie蔬s湯an楚d盈ve達(dá)ri腳fy遵w懸he筋th糕er釘o監(jiān)r獸no返t怒th急e孝eq畏ui勢(shì)li升br導(dǎo)iu祥m攏co劣nd尾it輪io督ns逢a判re晃s棵at垮is者fi柳ed。取結(jié)釋點(diǎn)A，驗(yàn)載證結(jié)摘點(diǎn)A的力品矩平晉衡條城件：同樣脆可根答據(jù)剪僅力圖塌和軸逢力圖床驗(yàn)證譜投影誤平衡訪(fǎng)條件合是否產(chǎn)滿(mǎn)足煉。（盞同學(xué)燦可自愿己驗(yàn)鈴證）取結(jié)點(diǎn)，繪受力圖，列平衡方程正確貝的解困答應(yīng)滿(mǎn)足禿什么浸條件?錯(cuò)誤摩的解譽(yù)答能燙否滿(mǎn)足購(gòu)平衡落條件?qllEI2EIAX2X1AqMMX1=1M1X2=1M22、位疑移條符件校幸核Th癥e懼ch崖ec雷ki辣ng奴o肢f銹di守sp幅la鉛ce顏me遙nt覺(jué)c醋o(hù)n藝di貴ti值on嬸s對(duì)有抖封閉鉛無(wú)鉸秩框格尊的剛堅(jiān)架，始當(dāng)只扶承受希荷載葬時(shí)，尖利用授框格俯上任真意截乏面處知的相叔對(duì)角太位移徑為零捧的條方件，陜則：Fo辮r部an桶y久cl金os臺(tái)ed摸f超ra糊me旋t前ha鴿t麗is源o糕nl鞏y容su觀bj題ec律te梯d導(dǎo)to衣e轉(zhuǎn)xt芽er榨na色l闖lo腸ad胞s,諸u襯si未ng財(cái)t財(cái)he勸c蜓on纏di耐ti識(shí)on蹦t絡(luò)ha扮t騎th衣e昨re培l(xiāng)a誕ti監(jiān)ve展r蘭ot番at紙io餐n顧of掌a耐ny齒o棵ne厘o漏f展th俗e威cr軋os民s宴se避ct烤io磁ns者i寄s竟eq害ua狠l列to衡z襯er企o,懼w極e逮ob橋ta黨in11或繞河框格M/顫EI面積亮之和靈為零Th抹e眨su業(yè)m兇of氏t鄭he費(fèi)a敞re般a像of悟M右/E持I逗di駁ag俊ra冠ms怖f憲or觸t血he溪m法em稀be初rs跡o放f慈cl偵os默ed錯(cuò)f喬ra馬me漠e什qu奇al額s江to畢z較er親ot1t1t2t1t1t1t2t1基本野結(jié)構(gòu)奏由于鈴溫度逐變化碌引起敢的沿Xi方向蛇的位桌移。位移械條件di謙sp近la址ce堡me泄nt雅c授on耀di麥ti丙on亭s由疊盡加原棍理，得又可減寫(xiě)成擠：§7朗-9溫度堵變化蝦時(shí)超廈靜定墨結(jié)構(gòu)持內(nèi)力腥的計(jì)蜘算In判te棒rn射al嫩f值or爹ce年s重du牛o辦to腐t常em梢pe茅ra腐tu蛛re蛙c梅ha稱(chēng)ng猴est1t1t2t1X1X2基本陰體系pr齊im躬ar怖y柜st脂ru厲ct羽ur撞e解So拌lu旋ti逆on：例Ex靠am武pl鍋e.求圖暴示剛您架由屠于溫紫度變攏化引定起的習(xí)內(nèi)力勇與K點(diǎn)的豆位移雖。t1=+佳250Ct2=+償350C,啞EI順=常數(shù),矩形劇截面,h項(xiàng)=l含/1鑒0.De趴te墨rm球in盟e倉(cāng)th臭e搏in繪te資rn犁al餅f職or爸ce錘s笛a(bǔ)n福d辜th劫e驗(yàn)di凍sp姿la嗽ce蘭me相nt莫o吳f呈se胸ct工io場(chǎng)n頌K凍of博t懸he缸g喇iv撇en別r夾ig袋id橋f啄ra材me著d術(shù)uo恩t寧o淘te韻mp喝er尾at賽ur洲e偉ch拼an院ge攤.t1=+直250Ct2=+亡350C,支EI踩=c混on麻st糊an席t,捕r杯ec先ta廚ng貪ul骨ar南s精ec用ti各on砍,跳h=瞞l/鉗10M1M溫度巨改變隊(duì)引起加的內(nèi)傭力與保各桿醒的絕歸對(duì)剛握度EI有關(guān)駛。Th秤e遺in歇te句rn犯al拖f錦or行ce膏s透du紡e事to岡t詠em心pe溫ra姑tu逼re績(jī)c斜ha束ng旨e半is菊r落el絨at籮ed蛛t季o釋th翠e住ab會(huì)so青l(xiāng)u影te名r到ig唇id迫it衫y知EI繡o諒f幼th吉e么me濟(jì)mb灘er揪sMi溫度匯低的甲一側(cè)橡受拉。CX1CX1§7捐-1拐0支座閣移動(dòng)塵時(shí)超信靜定狠結(jié)構(gòu)化的計(jì)銅算In雙te渴rn變al源f秩or罵ce輸s桑du陵o森to萬(wàn)s庫(kù)up翻po色rt寫(xiě)s透et妖tl屢em撇en罷ts計(jì)算各原理叔與荷笛載作武用時(shí)慮的計(jì)憤算相忍同Th籃e套co肉mp鋼ut停at允io環(huán)n移pr克in搏ci養(yǎng)pl盒eis杯i著de停nt挖ic虜al格t摟o敞th有e陣ca余se病u浸nd肆er瘦l只oa列ds由基淡本體冠系位謙移與恢原結(jié)貼構(gòu)位暴移相膀同建濱立基侮本方恰程,計(jì)算規(guī)多于供未知得力。Us裁in啦g挑th短e朝co禍nd攏it梅io籠n雙th傅at甚t麗he鄭d敢is伶pl容ac注em夢(mèng)en爪ts響o伴f令th塊e飯pr云im奪ar詢(xún)y票st影ru附ct阿ur備e共ar排e灶id慨en側(cè)ti到ca內(nèi)l桌to宿t賺ha態(tài)t侮of嗽o鋼ri揪gi剃na辨l傷st轟ru纖ct朵ur毀e獄to秩d護(hù)ev洋el隨op倍e塑qu躁at婚io屠n餅an尺d出fu做rt冒he建r憂(yōu)to允d害et按er臉mi述ne情u盒nk虎no洲wn凱f傻or悠ce晶s.注：嚷方程驗(yàn)的右遇端項(xiàng)閃可能仙不為丑零，秒與基懂本結(jié)憑構(gòu)的旬選擇胡有關(guān)潤(rùn)。Re囑ma秀rk電:射Th籠e扶ri酷gh梳t(yī)切si苦de橋o男f油th吃e監(jiān)eq偶ua澆ti島on晃m傅ay粱n除ot新e驢qu裙al晴t罩o冠ze百ro賠,甜wh研et嬸he縮慧r裕or垃n抽ot錦t邁he丹r暈ig盡ht德s擱id棋e(cuò)晚of滿(mǎn)t幻玉he慕e離qu餓at朋io民n暗eq銷(xiāo)ua油ls詠t提o葛ze愿ro抬d的ep艷en芳d透on擴(kuò)t鈔he研p阿ri飯ma卷ry烘s灰tr眉uc抓tu蛇re哥s鞏el爛ec夾te韻d.思考欣：什忘么情吹況下格方程宮右端申不為悉零？CX1CX1Is兼t繭he演di望sp徐la款ce笨me率nt短i害n纏th助e渣di旅re漁ct強(qiáng)io幟n缺of圣X乒1保in蛙du并ce周d姓by花t棄he訓(xùn)s醉et機(jī)tl削em暮en懲t伸of蚊s奪up暈po棗rt蘭C解So匹lu堂ti購(gòu)on：例Ex騙am辣pl緣瑞e.求圖濾示梁傘由于偷支座綿移動(dòng)胞引起堅(jiān)的內(nèi)章力.仗Fi夫nd準(zhǔn)t散he蟲(chóng)i獸nt飾er六na漿l他fo異rc娃es恥i垂nd街uc棒ed睬b代y競(jìng)su久pp顫or約t塑se胡tt怨le黃me誦ntlEIM1M21M21M支座義移動(dòng)多引起估的內(nèi)優(yōu)力與如各桿的絕郵對(duì)剛否度EI有關(guān)宅。練習(xí):寫(xiě)出匯典型離方程,并求銜出自遵由項(xiàng)忽。Ex攜er蛛ci諷se姓:遇D四ev渠el母op螞c費(fèi)an剝on膊ic快al宜e田qu堤at杏io但ns鞏a艦nd爽d借et釋er賠mi范ne路f重re樂(lè)e巡壽te漿rm血sD1C=b該/l幾何槽法:D2C=-忍b/lD3C=0公式頁(yè)法:1/l1/l0練習(xí):寫(xiě)出很典型釘方程,并求墳出自裳由項(xiàng)鑰。Ex土er殲ci保se淹:言D紫ev米el寧op鳳c鄭an圍on尚ic灶al解e塘qu頓at苦io滅ns別a忙nd姿d坐et箱er并mi完ne侍f啦re交e慮te社rm新sD1C=0D2C=0D3C=0支座伴移動(dòng)匠時(shí),結(jié)構(gòu)呢中的愚位移曾以及遣位移永條件院的校黨核公秤式如內(nèi)下:制造竿誤差梯引起曲的內(nèi)駝力計(jì)范算:AB桿造適長(zhǎng)了1c萌m,如何抱作彎阿矩圖?BA10m10m機(jī)動(dòng)甘法作恥影響破線(xiàn)Co沉ns騎tr浪uc灣t神in脊fl耳ue屯nc蠟e柏li吸ne椅s響by遲M常ec敘ha亦ni倍sm衛(wèi)ic同M嗓et克ho晝d兩種辦方法批：2床me謀th掏od噴s:1、靜浙力法訊：按粒照力什法求座出影貨響線(xiàn)凝方程未；St閱at拴ic北m差et做ho寧d:挨d戶(hù)et伙er孝mi曉ne器i燭nf糊lu銹en斤ce院l導(dǎo)in趟es影b婦y婦fo適rc頑e躺me消th婆od2、機(jī)剪動(dòng)法塘：利就用位世移圖鄙做影網(wǎng)響線(xiàn)隊(duì)。Me眼ch賺an私is城mi資c版Me域th憤od哪:備us徑e迅di圾sp粘la跳ce碧me技nt量g諷ra誦ph塘t蝴o賞co談ns語(yǔ)tr蔑uc購(gòu)t木in教fl饞ue秋nc媽e稿li塘ne擴(kuò)s1、靜范力法st瓦at筋ic萍m帝et結(jié)ho匯d：求支織座反幸力影裳響線(xiàn)co尖ns援tr俗u(yù)c嘩t蜜IL箏o恨