机械原理-王德伦-课后答案[1-24-12章]

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1、1-1.1-2.1-31-4.1-5.1-6.1-7.1-8.1-9.2-1123456789-2-22-3QPCDAB2-42-51123474562-1A21BD3334-11(2)3324-2A11234511Watt’slinkage4-2-1a2Stephenson’slinkage4-2-1b214-2-1a4-2-2ab24-2-1b4-2-2cd314-2-2a4-2-3a24-2-2b34-2-2c4-2-3b44-2-2d4-2-3c(b)cB312345431234-3A112331415,63

2、22321333341,2,3,45,61,3,4,52511,2,3,45,6BG5-11211500/60/i=1500/60=25325=2.922:1255346180°231.40K10180K=1.430K15-25.2:5-3,,,5-4123611MOxyOMMMMPP(x,)y=(5,5)(x,)y=(30,5)1M2M11MM22MMxxjFijMcosisinixMiyjFiMyijMMisinicosiyMi11001Mii=1,2,3iFMjjj=1,21cossinxcos(5)sin(5

3、)10111MMysincossin(5)cos(5)451111M0010012cossinxcos(30)sin(30)30222MMysincossin(30)cos(30)502222M0010013cossinxcos(80)sin(80)56333MMysincossin(80)cos(80)463333M001001222(xx)()yyr11FA11FAA222(xx)()yyr12FA12FAA222(xx)()yyr13FA13FAA(x,)yrAAAmatlabclearclcth1=5*pi/

4、180;th2=30*pi/180;th3=80*pi/180;M1=[cos(th1)sin(th1)10;sin(th1)cos(th1)45;0,0,1];M2=[cos(th2)sin(th2)30;sin(th2)cos(th2)50;001];M3=[cos(th3)sin(th3)56;sin(th3)cos(th3)46;001];x1m=5;y1m=5;x2m=30;y2m=5;m1=[x1m;y1m;1];m2=[x2m;y2m;1];f11=M1*m1;f12=M2*m1;f13=M3*m1;f

5、21=M1*m2;f22=M2*m2;f23=M3*m2;A=solve('(f11(1)xa)^2+(f11(2)ya)^2ra^2'...,'(f12(1)xa)^2+(f12(2)ya)^2ra^2'...,'(f13(1)xa)^2+(f13(2)ya)^2ra^2'...,'xa','ya','ra');B=solve('(f21(1)xb)^2+(f21(2)yb)^2rb^2',...'(f22(1)xb)^2+(f22(2)yb)^2rb^2',...'(f23(1)xb)^2+(f23(2)yb)^

6、2rb^2',...'xb','yb','rb');Xa=eval(A.xa)Ya=eval(A.ya)Ra=eval(A.ra)Xb=eval(B.xb)Yb=eval(B.yb)Rb=eval(B.rb)Xa=34.0979Ya=11.2030Ra=54.4201Xb=39.8915Yb=20.3409Rb=17.069121matlabclearclcth1=5*pi/180;th2=30*pi/180;th3=80*pi/180;M1=[cos(th1)sin(th1)10;sin(th1)cos(th1)4

7、5;0,0,1];M2=[cos(th2)sin(th2)30;sin(th2)cos(th2)50;001];M3=[cos(th3)sin(th3)56;sin(th3)cos(th3)46;001];M1_n=inv(M1)M2_n=inv(M2)M3_n=inv(M3)M1_n=0.99620.08726.03990.08720.996245.7003001.0000M2_n=0.86600.50000.98080.50000.866058.3013001.0000M3_n=0.17360.984835.57

8、690.98480.173663.1371001.0000Pjij=1,2i=1,2,3jMiAB00CDC(22.54,41.39)D(2.12,4.43)62x=1000mmPPPPF1F2F3F4O(1000,y)(950,y)(865,y)(745,y).McossinMsincos0204060clearclcth1=0;th2=20