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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3472/CH43/EX43.9/Example43_9.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '3472/CH43/EX43.9/Example43_9.sce')
| -rw-r--r-- | 3472/CH43/EX43.9/Example43_9.sce | 41 |
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diff --git a/3472/CH43/EX43.9/Example43_9.sce b/3472/CH43/EX43.9/Example43_9.sce new file mode 100644 index 000000000..fa0ce06e7 --- /dev/null +++ b/3472/CH43/EX43.9/Example43_9.sce @@ -0,0 +1,41 @@ +// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION
+
+// PART IV : UTILIZATION AND TRACTION
+// CHAPTER 5: ELECTRIC TRACTION-SPEED TIME CURVES AND MECHANICS OF TRAIN MOVEMENT
+
+// EXAMPLE : 5.9 :
+// Page number 783
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+V_A = 48.0 // Speed(kmph)
+t_1 = 24.0 // Time taken to accelerate from rest to speed(sec)
+t_2 = 69.0 // Coasting time(sec)
+r = 58.0 // Constant resistance(N/tonne)
+beta = 3.3 // Retardation(km phps)
+t_3 = 11.0 // Retardation time(sec)
+t_iii_a = 20.0 // Station stop time(sec)
+t_iii_b = 15.0 // Station stop time(sec)
+I = 10.0 // Rotational inertia(%)
+
+// Calculations
+alpha = V_A/t_1 // Acceleration(km phps)
+V_B = beta*t_3 // Speed at B(km phps)
+beta_c = (V_A-V_B)/t_2 // Retardation during coasting(km phps)
+distance_acc = 1.0/2*t_1*V_A/3600 // Distance covered during acceleration(km)
+distance_coasting = (V_A**2-V_B**2)/(2*beta_c*3600) // Distance covered during coasting(km)
+distance_braking = t_3*V_B/(3600*2) // Distance covered during braking(km)
+distance_total = distance_acc+distance_coasting+distance_braking // Total distance(km)
+speed_iii_a = distance_total*3600/(t_1+t_2+t_3+t_iii_a) // Scheduled speed with a stop of 20 sec(kmph)
+speed_iii_b = distance_total*3600/(t_1+t_2+t_3+t_iii_b) // Scheduled speed with a stop of 15 sec(kmph)
+
+// Results
+disp("PART IV - EXAMPLE : 5.9 : SOLUTION :-")
+printf("\nCase(i) : Acceleration, α = %.f km phps", alpha)
+printf("\nCase(ii) : Coasting retardation, β_c = %.2f km phps", beta_c)
+printf("\nCase(iii): Scheduled speed with a stop of 20 seconds = %.2f kmph", speed_iii_a)
+printf("\n Scheduled speed with a stop of 15 seconds = %.2f kmph\n", speed_iii_b)
+printf("\nNOTE: ERROR: Calculation mistakes in the textbook solution")
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