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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /213/CH10/EX10.17/10_17.sce | |
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Diffstat (limited to '213/CH10/EX10.17/10_17.sce')
| -rwxr-xr-x | 213/CH10/EX10.17/10_17.sce | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/213/CH10/EX10.17/10_17.sce b/213/CH10/EX10.17/10_17.sce new file mode 100755 index 000000000..5c6445f50 --- /dev/null +++ b/213/CH10/EX10.17/10_17.sce @@ -0,0 +1,21 @@ +//To find power absorbed in friction
+clc
+//Given:
+W=20*1000 //N
+alpha=120/2 //degrees
+Pn=0.3 //N/mm^2
+N=200 //rpm
+mu=0.1
+//Solution:
+//Calculating the angular speed of the shaft
+omega=2*%pi*N/60 //rad/s
+//Calculating the inner radius of the bearing surface
+r2=sqrt(W/(3*%pi*Pn)) //mm
+//Calculating the outer radius of the bearing surface
+r1=2*r2 //mm
+//Calculating the total frictional torque assuming uniform pressure
+T=2/3*mu*W*(1/sind(alpha))*(r1^3-r2^3)/(r1^2-r2^2)/1000 //N-m
+//Calculating the power absorbed in friction
+P=T*omega/1000 //kW
+//Results:
+printf("\n\n Power absorbed in friction, P = %.3f kW.\n\n",P)
\ No newline at end of file |