【正文】 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 unit 1Staic Analysis of BeamsA bar that is subjected t o forces acti ng trasverse toits axi s i caled a beam. In this ect ion we Wil consi der only a few of t he simplest types of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌 甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 例 中的橫梁是靜定的，因?yàn)樗械牧Χ伎梢酝ㄟ^(guò)平衡方程求出。 過(guò)程裝備與控制工程課后材料專(zhuān)業(yè)英語(yǔ)翻譯 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 unit 1Static Anal ysi of BeamsA bar t hat isubjected to for ces acting tr asverse t o it s axis iscal ed a beam. In t his section we Wi l consider only a few of the simplest ypes of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 負(fù)載加載在橫桿上的力有可能是集中的載荷。 過(guò)程裝備與控制工程課后材料專(zhuān)業(yè)英語(yǔ)翻譯 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 unit 1St atic Anal ysi s of BeamsA bar t hat issubjected to for ces acting tr asver se t o it s axis iscal led a beam. In t his section we Wi l consider only a few of the simplest ypes of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔 雜減綻醚蛆馱虛掃 圖 b 中的一端固定，一端自由運(yùn)動(dòng)的橫梁，稱(chēng)為懸臂支撐橫梁，固定 端 懸臂支撐不能旋轉(zhuǎn)和轉(zhuǎn)化 ，但是自由端可以。然后我們將要討論那些更常見(jiàn)的不對(duì)稱(chēng)橫截面橫梁的彎曲 過(guò)程裝備與控制工程課后材料專(zhuān)業(yè)英語(yǔ)翻譯 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 unit 1St ati c Anal ysi s of BeamsA bar t hat issubjected to forces acti ng t rasver se to i ts axi s i cal led a beam. In thi s ecti on we Wil consider onl y a few of t he simplest t ypes of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 a 中的橫梁，由一端固定另一端滾動(dòng)組成的橫梁，稱(chēng)為簡(jiǎn)單支撐橫梁，或簡(jiǎn)單橫梁，簡(jiǎn)單橫梁主要的特征是兩個(gè)末端在彎曲時(shí)都可以自由轉(zhuǎn)動(dòng)，但是 不能 轉(zhuǎn)換 。假設(shè)每一個(gè)橫梁都有水平面對(duì)稱(chēng)，和自身的線(xiàn)平行對(duì)稱(chēng)，因此，橫梁的橫截面又垂直的對(duì)稱(chēng)性。 thus, we find 過(guò)程裝備與控制工程課后材料專(zhuān)業(yè)英語(yǔ)翻譯 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 unit 1Staic Analysis of BeamsA bar that is subjected t o forces acti ng trasverse to its axi s i caled a beam. In this ect ion we Wil consi der only a few of t he simpl est types of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 L aLPRA )(1 ?? LLPRB 1? The reactions for the beam with an overhang [ (c)]can be found the same 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 unit 1Stai c Analysis of BeamsA bar t hat i s ubj ect ed to f orces act ing trasverse to its axis i s caled a beam. I n this section we Wil l consider only a f ew of the simpl est types of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 For the cantilever beam[(b)], the action of the applied load q is equilibrated by a vertical force RA and a couple MA acting at the fixed support, as shown in the figure. From a summation of forces in certical direction , we include that 過(guò)程裝備與控制工程課后材料專(zhuān)業(yè)英語(yǔ)翻譯 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 uni t 1Staic Analysis of BeamsA bar that i s ubj ect d t o f orces act ing trasverse to its axis i s caled a beam. In this ection we Wil consi der only a few of the simpl est types of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 qbRA? ， 過(guò)程裝備與控制工程課后材料專(zhuān)業(yè)英語(yǔ)翻譯 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 uni t 1St at i c Anal ysi s of Beam sA bar t hat i s subj ect ed t o f or ces act i ng t r asver se t o i t s axi s i s cal l ed a beam . I n t hi s sect i o n we Wi l l consi der onl y a f ew of t he si m pl est t ypes of beam s, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重 塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 And ,from a summation of moments about point A, we find 過(guò)程裝備與控制工程課后材料專(zhuān)業(yè)英語(yǔ)翻譯 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 unit 1Stai c Analysis of BeamsA bar that is subjected to forces acti ng trasverse toits axi s i caled a beam. In thi s ect ion we Wil consider only a few of t he simplest types of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 )2( baqbMA ?? ， 過(guò)程裝備與控制工程課后材料專(zhuān)業(yè)英語(yǔ)翻譯 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 uni t 1St at i c Anal ysi s of Beam sA bar t hat i s subj ect ed t o f or ces act i ng t r asve r se t o i t s axi s i s cal l ed a beam . I n t hi s sect i on we Wi l l consi der onl y a f ew of t he si m pl est t ypes of beam s, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 The reactive moment MA acts counterclockwise as shown in the 專(zhuān)業(yè)英語(yǔ)翻譯 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 unit 1Static Analysis of BeamsA bar that is ubjected to for ces acting tr asverse t o it s axis is cal ed a beam. I n t his section we Wi l consider only a f ew of the simplest ypes of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹 琺彬阻便兌扔雜減綻醚蛆馱虛掃 The preceding examples illustrate how the reactions(forces and moments) of statically determinate beams requires a considerition of the bending of the beams , and hence this subject will be 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 unit 1Static Analysis of BeamsA bar that is ubject ed to for ces acting tr asverse to it s axis is cal ed a beam. I n t his section we Wil l consider only a f ew of the simplest ypes of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 The idealized support conditions shown in are encountered only occasionally in practice. As an example ,longspan beams in bridges sometimes are constructionn with pin and roller supports at the ends. However, in beams of shorter span ,there is usually some restraint against horizonal movement of the supports. Under most conditions this restraint has little effect on the action of the beam and can be neglected. However, if the beam is very flexible, and if the horizonal restraints at the ends are very rigid , it may be necessary to consider their 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 unit 1St atic Anal ysi of BeamsA bar t hat is ubjected to for ces acting tr asverse t o it s axis is cal l ed a beam. In this ect ion we Wil consi der only a few of t he simplest types of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 Example*過(guò)程裝備與控制工程課后材料專(zhuān)業(yè)英語(yǔ)翻譯 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 unit 1Static Analysis of BeamsA bar that is ubjected to for ces acting tr asverse t o it s axis iscal ed a beam. I n t his section we Wi l consider only a few of the simplest ypes of beams, 遮名型苗臥淑繁鎢詐敞步剩岸馳封肇嬌甥邵尖顆歡泌重塌淀仇奮炙肇礦痞掃莉彭?yè)磭樤V叭牌合斬偏夢(mèng)怠妝算佳卸惹琺彬阻便兌扔雜減綻醚蛆馱虛掃 Find the reactions at the supports for a simple beam loaded as shown in (a ). Neglect the weight of the 裝控 091 專(zhuān)業(yè)英語(yǔ)翻譯 uni t 1Static Analysis of BeamsA bar that is ubj ect ed to f orces act ing trasverse to its axis is cal ed a beam. I n this section we Wil l conside