1-1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。FOBWAOWAB(a)(b)BOWBOWAA(d)(e)解：FBOOWAFB
WFA
BFA
FB
(a)(b)FBFBFA
AOWBOWAFA
(d)(e)1-2试画出以下各题中AB杆的受力图。AAECCWWDDBB(a)(b)AOW(c)FOAOFA
W(c)ACWB(c)《工程力学》习题选解ACFAB(d)(e)AECFA
CWDBFB
(a)AFCB(d)FB
FA
CW(e)(b)FDDBFB
W(c)BFB
CWB解：FE
AFA
ACFD
WFAAFBB1-3试画出以下各题中AB梁的受力图。qACDFBACWBACW(a)BD(b)(c)qABB’(e)FADCWBFA’D’(d)1《工程力学》习题选解解：FAACW(a)FFA
FD
(d)ADWFB
CBFB
BAqDFC(b)qAFDFBACWFC
BFB
(c)FFBx
BFBy(e)FA1-4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。FABWCFBDADB(a)AFCDD(d)解：FAFAxFAy(a)FD
FA
(b)B(c)BWCFBFB
DADFDFB
AFBC(e)C(f)WBWA(b)AB(c)AFDD’2《工程力学》习题选解ACFC
BFB(d)FADC(e)FA
FAB
BWBFB
FBC
(f)W1-5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。BWABP(a)(b)ABW2C(c)EF(d)CBDPAFFW1AAOBGC’CW(e)D解：(a)FAT
FAB
AFA
FBT
BWFBA
3《工程力学》习题选解(b)CF’C
AFB
BFC
CPPFB(c)FBFBxF’BxBWFBy
F’By
1
W2AFAx
FCx
CFAy
FCy
(d)AFDFC
CEFCBF’C
FB
FEFF(e)FB
GAOBBDFOx
FB
WFOyFC
CAFA
BPPFN
FBW1
W2AFAx
FCx
CFAy
FCy
ADFEFCBFEFFFBAOBFOx
GDFOyC’CWFC’
4
《工程力学》课后习题解答 - 图文
