文档介绍：BAOW(a)BAOWF(b)OW(c)A1-1试画出以下各题中圆柱或圆盘的受力图,与其它物体接触处的摩擦力均略去。AOW(d)BAOW(e)BFBFABOW(a)BAOWF(b)FAFBAOW(c)FAFOAOW(d)FBFAAOW(e)BFBFA解:1-2试画出以下各题中AB杆的受力图。AWCB(c)D(a)AWCEB(b)AWCDBABF(d)CABW(e)C(a)FDFBFEDAWCEB(b)AWCDBFDFBFA(c)AWCBFBFA解:ABW(e)CFBFAABF(d)CFBFA1-3试画出以下各题中AB梁的受力图。AWCB(a)WABCD(c)ABFqD(ABFWDA’D’B’(d)ABFq(e)AWCB(a)FBFAABFqD(b)FCFDWABC(c)FCFB解:CABFWD(d)FBFAFDABFq(e)FBxFByFA1-4试画出以下各题中指定物体的受力图。(a)拱ABCD;(b)半拱AB部分;(c)踏板AB;(d)杠杆AB;(e)方板ABCD;(f)节点B。ABF(a)DCWAF(b)DB(c)FABDD’ABF(d)CDWABCD(e)WABC(f)解:ABF(a)DCWFAxFAyFDAF(b)CBFBFA(c)FABDFBFDABF(d)CFBFCWABCD(e)FBFAWB(f)FABFBC1-5试画出以下各题中指定物体的受力图。(a)结点A,结点B;(b)圆柱A和B及整体;(c)半拱AB,半拱BC及整体;(d)杠杆AB,切刀CEF及整体;(e)秤杆AB,秤盘架BCD及整体。ABPP(b)ABW(a)FDABCEF(d)(c)’DOG(e)FAT解:(a)ABFBAFBTWFABFA(b)FCAPCFBBPCF’CFAABPPFBFN(c)BCW1W2FAFCxFCyFAxFAyBW1FAFAxFAyFBxFByBCW2FCxFCyF’BxF’ByFABCFCFBDCEFFEF’CFFFDABCEFFEFFFB(d)BCDGFBFC(e)’DOGFOyFOxFC’ABOWFBFOyFOx2-2杆AC、BC在C处铰接,另一端均与墙面铰接,如图所示,F1和F2作用在销钉C上,F1=445N,F2=535N,不计杆重,试求两杆所受的力。C cABF2F14330o解:(1)取节点C为研究对象,画受力图,注意AC、BC都为二力杆, cF2F1xy(2)列平衡方程:AC与BC两杆均受拉。2-3水平力F作用在刚架的B点,如图所示。如不计刚架重量,试求支座A和D处的约束力。