initial commit / add all books

1 files changed, 72 insertions, 0 deletions

diff --git a/278/CH19/EX19.2/ex_19_2.sce b/278/CH19/EX19.2/ex_19_2.sce
new file mode 100755
index 000000000..bb8d43393
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+// find..

+clc

+//solution

+//given

+P=35000//W

+N=240//rpm

+L=0.350//mm

+u=0.25

+t=10//mm

+n=6

+q=%pi

+fts=80//N/mm^2

+ftk=80//N/mm^2

+ts=50//N/mm^2

+tk=50//N/mm^2

+f=2.5//N/mm^2

+ft=4.5//N/mm^2

+fb=15//N/mm^2

+rho=7200//kg/m^3

+//fb*10^6=rho*v^2

+v=sqrt(ft*10^6/rho)//m/s

+printf("the speed is,%f m/s\n",v)

+D=(v*60)/(%pi*N)//m

+printf("the dia of pulley is,%f m\n",D)

+//let b e width of belt 

+//let T1 and T2 be tension on tight and slag side

+//P=(T1-T2)*v

+//T1-T2=1400//N

+//log(T1/T2)=u*q=0.25*3.14=0.3415

+//T2=T1/2.195//N

+T1=2572//N

+T2=1172//N

+rho1=1000//kg/m^3

+//A=b*t=10*b/10^6//m^2

+//let b is width

+//m=A*rho1=b*t*rho=0.01*b//kg/m

+//Tc=m*v^2=6.25*b

+//T=f*b*t=25*b//N

+//T1=T-Tc

+//T1=25*b-6.25b

+//b=T1/18.75//mm

+printf("the width of belt si,%f mm\n",T1/18.75)

+printf("the standard width of belt is b=140mm\n")

+b=140//mm

+Tc=6.25*b//N

+//let d eb dia of shaft

+T3=(P*60)/(2*%pi*N)//N-mm

+M=(T1+T2+2*Tc)*L

+Te=sqrt(M^2 + T3^2)

+//d=((Te*16*1000)/(%pi*ts))^(1/3)//mm

+printf("the dia of shaft is,%f mm\n",((Te*16*1000)/(%pi*ts))^(1/3))

+printf("the standard dia of shaft is d=65mm\n")

+d=65//mm

+//corres to d=65mm,

+width =20//mm

+thickness =12//mm

+printf("correponding to d=65mm,thickness and width is,%f mm\n,%f mm\n",thickness,width)

+//let l be length of key

+//T3*1000=l*20*tk*d/2

+//l=T3/(32500)//mm

+printf("the length of key is,%f mm\n",T3/(32500))

+printf("length should be atleast l=102 mm\n")

+printf("therfore length is 102 mm\n")

+l=102//mm

+//let b1 minor axis,a1 major axis

+M=2*T3/n*1000//N-mm

+//a1=2b1

+//Z=(%pi/32)*b1*a1^2=(%pi)/8*b1^3=0.2=393*b1^3

+//fb=M/Z

+b1=(M/(0.393*fb))^(1/3)//mm

+printf("the minor and moajor axis is,%f mm\n,%f mm",b1,2*b1)

+