diff options
Diffstat (limited to '3886/CH6/EX6.15/6_15.sce')
| -rw-r--r-- | 3886/CH6/EX6.15/6_15.sce | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/3886/CH6/EX6.15/6_15.sce b/3886/CH6/EX6.15/6_15.sce new file mode 100644 index 000000000..7cae55cb3 --- /dev/null +++ b/3886/CH6/EX6.15/6_15.sce @@ -0,0 +1,14 @@ +//Screw jack parameters
+p=10 //mm
+d=50 //mm
+W=6000 //N
+theta=atand(p/(%pi*d)) //degree
+fi=atand(0.05) //degree
+R=300 //mm
+P=(d*W*tand(theta+fi))/(2*R) //N
+VR=(2*%pi*R)/(p)
+MA=W/P
+eta=MA*100/VR //percent
+//torque required to keep the load from descending
+T=(50*600*tand(3.6426-2.8624))/2 //N-mm
+printf("Efficiency eta=%0.2f percent > 50 percent\nThus the screw jack is not self locking\nTorque required to keep the load from descending T=%0.2f N-mm",eta,T)
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