圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件

第5章扭轉(zhuǎn)與剪切第5章扭轉(zhuǎn)與剪切5,1扭轉(zhuǎn)的概念與實(shí)例52外力偶矩與扭矩53圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算54圓軸扭轉(zhuǎn)變形與剛度計(jì)算55剪切與擠壓的實(shí)用計(jì)算思考與練習(xí)第5章扭轉(zhuǎn)與剪切1第5章扭轉(zhuǎn)與剪切5扭轉(zhuǎn)的概念與實(shí)例511扭轉(zhuǎn)的概念圖51第5章扭轉(zhuǎn)與剪切2第5章扭轉(zhuǎn)與剪切其變形特點(diǎn)是:桿件的任意兩橫截面繞軸線(xiàn)產(chǎn)生相對(duì)轉(zhuǎn)動(dòng),但桿的軸線(xiàn)位置和形狀保持不變。這種變形稱(chēng)為扭轉(zhuǎn)。以扭轉(zhuǎn)為主要變形的桿件稱(chēng)為軸。第5章扭轉(zhuǎn)與剪切3第5章扭轉(zhuǎn)與剪512受扭圓軸實(shí)例FF圖5.2第5章扭轉(zhuǎn)與剪4第5章扭轉(zhuǎn)與剪切FOXX圖53第5章扭轉(zhuǎn)與剪切5第5章扭轉(zhuǎn)與剪切52外力偶矩與扭矩521外力偶矩的計(jì)算在工程中,作用于圓軸上的外力偶矩一般不是直接給出的,通常給出的是圓軸所需傳遞的功率和轉(zhuǎn)速。因此,需要了解功率、轉(zhuǎn)速和外力偶矩三者之間的關(guān)系,即M=9549式中,M作用于軸上的外力偶矩,單位:NmP軸所傳遞的功率,單位:kW;n軸的轉(zhuǎn)速,單位:r/min。說(shuō)明:軸上輸入力偶矩是主動(dòng)力偶矩,其轉(zhuǎn)向與軸的轉(zhuǎn)向相同;軸上輸力偶矩是力俜矩,其轉(zhuǎn)向與軸的轉(zhuǎn)向相反第5章扭轉(zhuǎn)與剪切6第5章扭轉(zhuǎn)與剪切【例51】已知某傳動(dòng)軸傳遞的功率為7.5kW,轉(zhuǎn)速為300r/min,試計(jì)算此傳動(dòng)軸傳遞的外力偶矩解由公式(5.1)計(jì)算得M=9540、75238.725N·m300第5章扭轉(zhuǎn)與剪切7第5章扭轉(zhuǎn)與剪切M0))圖5.4第5章扭轉(zhuǎn)與剪切8圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件9第5章扭轉(zhuǎn)與剪切Mn(≈(+)(+)圖5.5第5章扭轉(zhuǎn)與剪切10圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件11圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件12圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件13圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件14圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件15圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件16圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件17圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件18圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件19圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件20圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件21圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件22圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件23圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件24圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件25圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件26圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件27圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件28圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件29圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件30圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件31圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件32圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件33圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件34圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件35圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件36圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件37圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件38圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件39圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件40圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件41圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件42圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件43圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件44圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件45圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件46圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件47圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件48圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件49圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件50圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件51圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件52圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件53第5章扭轉(zhuǎn)與剪切第5章扭轉(zhuǎn)與剪切5,1扭轉(zhuǎn)的概念與實(shí)例52外力偶矩與扭矩53圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算54圓軸扭轉(zhuǎn)變形與剛度計(jì)算55剪切與擠壓的實(shí)用計(jì)算思考與練習(xí)第5章扭轉(zhuǎn)與剪切54第5章扭轉(zhuǎn)與剪切5扭轉(zhuǎn)的概念與實(shí)例511扭轉(zhuǎn)的概念圖51第5章扭轉(zhuǎn)與剪切55第5章扭轉(zhuǎn)與剪切其變形特點(diǎn)是:桿件的任意兩橫截面繞軸線(xiàn)產(chǎn)生相對(duì)轉(zhuǎn)動(dòng),但桿的軸線(xiàn)位置和形狀保持不變。這種變形稱(chēng)為扭轉(zhuǎn)。以扭轉(zhuǎn)為主要變形的桿件稱(chēng)為軸。第5章扭轉(zhuǎn)與剪切56第5章扭轉(zhuǎn)與剪512受扭圓軸實(shí)例FF圖5.2第5章扭轉(zhuǎn)與剪57第5章扭轉(zhuǎn)與剪切FOXX圖53第5章扭轉(zhuǎn)與剪切58第5章扭轉(zhuǎn)與剪切52外力偶矩與扭矩521外力偶矩的計(jì)算在工程中,作用于圓軸上的外力偶矩一般不是直接給出的,通常給出的是圓軸所需傳遞的功率和轉(zhuǎn)速。因此,需要了解功率、轉(zhuǎn)速和外力偶矩三者之間的關(guān)系,即M=9549式中,M作用于軸上的外力偶矩,單位:NmP軸所傳遞的功率,單位:kW;n軸的轉(zhuǎn)速,單位:r/min。說(shuō)明:軸上輸入力偶矩是主動(dòng)力偶矩,其轉(zhuǎn)向與軸的轉(zhuǎn)向相同;軸上輸力偶矩是力俜矩,其轉(zhuǎn)向與軸的轉(zhuǎn)向相反第5章扭轉(zhuǎn)與剪切59第5章扭轉(zhuǎn)與剪切【例51】已知某傳動(dòng)軸傳遞的功率為7.5kW,轉(zhuǎn)速為300r/min,試計(jì)算此傳動(dòng)軸傳遞的外力偶矩解由公式(5.1)計(jì)算得M=9540、75238.725N·m300第5章扭轉(zhuǎn)與剪切60第5章扭轉(zhuǎn)與剪切M0))圖5.4第5章扭轉(zhuǎn)與剪切61圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件62第5章扭轉(zhuǎn)與剪切Mn(≈(+)(+)圖5.5第5章扭轉(zhuǎn)與剪切63圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件64圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件65圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件66圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件67圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件68圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件69圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件70圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件71圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件72圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件73圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件74圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件75圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件76圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件77圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件78圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件79圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件80圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件81圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件82圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件83圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件84圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件85圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件86圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件87圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件88圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件89圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件90圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件91圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件92圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件93圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件94圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件95圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件96圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件97圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件98圓軸扭轉(zhuǎn)的切應(yīng)力與強(qiáng)度計(jì)算變形幾何關(guān)系課件99圓