《工程力学第7章习题答案...pdf》由会员分享,可在线阅读,更多相关《工程力学第7章习题答案...pdf(5页珍藏版)》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、 工程力学(第5 版)习题 解答步骤(第7 章)7-1 略 7-2 略 7-3解:M=9549nP=95493605.7=198.9375N.M AC 段:max=1PIM2D=324DM2D=316DM=3314.39375.19816=37.544MPa min=0 CB 段:max=2PIM2D=32)(44dDM2D=)(44d16DMD=)(44231433937519816 =46.786MPa min=2PIM2d=)(1644dDMd=)23(143293751981644=31.19MPa 7-4.解:A=PAITP=465010512101=20MPa max=WtT=36
2、5020101=40MPa 7-5.解:AM=9549nPA=954963060=909.4285N.m CM=9549nPC=954963020=303.1428 N.m max=WtT=16d3T d 03252500691252443714310428590916163333Tmm d 取 50mm 7-6.解:孔段:max=WtT=)21(1643DMA=)801(5014310300016433=207.13MPa DC 段:max=WtT=16d3AM=334014310300016=238.85MPa 又=100MPa 强度不足 7-7.解:实心轴、T=M=9549nP=9549
3、12014=1114.05N.m max=WtT=16d31T d1 316T=33601431005111416=10361146594=45.5667mm 取d1=46mm 空心轴:max=WtT=)21(1643DT D 34)21(16T=343)801(601431005111416=10324977160=54.3mm 取 D=56mm d=56 0.8=44.8mm 7-8.解:轴的拉矩图如图 可知,ABT=2000N.m BCT=-5000N.m PI=32d4=0.14d=0.1(10043)=1 1045m AB=0701431010108180501021805643PA
4、BGIlT BC179140180PBCGIlT 1090-179140-070BCABAC 7-9.解:扭矩图如图 max=a07812107516100016d33-3maxmaxMPTWtT)(AB=radGIlTPABAB00805032)1075(14310810002439BCrad00240PBCBCGIlT rad010465000240008050BCABCA 7-10.解:mNnPM70247024111 mNnPM62809702422 mNnPM44214702433 AB 段:AB16d3ABABABTWtT mm963679107014370241616363ABA
5、BTd AB32dG1801804ABPABTGIT mm6280841143108018070243218032d42942GTABAB mm85d取AB 同理BC 段:mm44396716d3BCBCT mm48227418032d42GTBCBC mm75d取BC 7-11.解:对轴:max=WtT=16d3T=MPaMPa60180147)1030(14.32501633 对套筒:max=WtT=MPaT1229)7501()1040(14.32501616)21(D43343 强度足够 7-12.解:AB333)1070(14329361616dABABTWtT=43.6166MPa
6、 BCMPaWtTBC95.71)1050(14317651633 BC 端有最大剪应力max=71.95MPa rad1008511070143104803270293632d2-43-94)(GlTGIlTABABPABABAB 同理 radBC210791 radBCAB2max108752 7-13.解:T=F.D=300 520 103=15N.m max=WtT=16d31T mm723mm66223m248413101060143156161632-3631Td max=WtT=)21(16D43T mm228m44221080-11060143156162-11632-34634)()(TD d=0.8D=0.8 28.2=22.56mm 51.07235622-228d4d4222212212)(实空DAAGG