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Diffstat (limited to '3532/CH4/EX4.4/Ex4_4.sce')
| -rw-r--r-- | 3532/CH4/EX4.4/Ex4_4.sce | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/3532/CH4/EX4.4/Ex4_4.sce b/3532/CH4/EX4.4/Ex4_4.sce new file mode 100644 index 000000000..d02fc736f --- /dev/null +++ b/3532/CH4/EX4.4/Ex4_4.sce @@ -0,0 +1,22 @@ +clc
+clear
+mprintf('Mechanical vibrations by G.K.Grover\n Example 4.3.2\n')
+//given data
+m=320//mass of engine in kg
+mo=24//reciprocating mass on motor in kg
+r=0.15//vertical stroke in m
+e=r/2
+delst=0.002//stati defln in m
+C=490/(0.3)//damping recistance in N-sec/m
+g=9.81// gravity in m/sec^2
+N=480//speed in rpm in case b)
+//calculation
+Wn=sqrt(g/delst) //natural freqency in rad/sec
+Nr=Wn/(2*%pi)*60 //resonant speed in rpm
+W=(2*%pi*N/60)
+bet=(W/Wn)
+zeta=(C/(2*m*Wn)) //damping factor
+y=(mo/m)//from eqn 4.3.2
+X=(y*e)*(bet)^2/sqrt((1-bet^2)^2+(2*zeta*bet)^2)//from eqn 4.3.2
+//output
+mprintf(' a)speed of driving shaft at which esonance occurs is %4.4f RPM\n b)The amplitude of steady state forced vibrations when the driving shaft \n of the engine rotates at 480 RPM is %f m',Nr,X)
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