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Diffstat (limited to 'Machine_Design_by_U.C._Jindal/Ch24.ipynb')
| -rw-r--r-- | Machine_Design_by_U.C._Jindal/Ch24.ipynb | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/Machine_Design_by_U.C._Jindal/Ch24.ipynb b/Machine_Design_by_U.C._Jindal/Ch24.ipynb new file mode 100644 index 00000000..5467776a --- /dev/null +++ b/Machine_Design_by_U.C._Jindal/Ch24.ipynb @@ -0,0 +1,188 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:d95986be60722ab1db01b1c918002f9e15f3dc0ce9ab06247d01ab6e633f6378" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Ch:24 Rope drive" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 24-1 - Page 635" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from __future__ import division\n", + "from math import sqrt, pi, exp, sin, asin\n", + "P=150000#\n", + "m=0.4#\n", + "D=1.8#\n", + "d=0.6#\n", + "C=4.2#\n", + "V=15#\n", + "Fc=m*V**2#\n", + "BL=44.81*10**3#\n", + "FOS=35#\n", + "F1=BL/FOS#\n", + "theta=pi-(2*asin((D-d)/(2*C)))#\n", + "beta=22.5*pi/180#\n", + "u=0.13#\n", + "x=u*theta/sin(beta)#\n", + "F2=(F1-Fc)/exp(x)#\n", + "n=P/((F1-F2)*V)#\n", + "n=13#\n", + "print \"n is %0.0f \"%(n)#" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "n is 13 \n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 24-2 - Page 635" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "W=1000#\n", + "m=0.498#\n", + "BL=78#\n", + "d=12#\n", + "Am=0.39*d**2#\n", + "dw=sqrt(Am*4/(6*19*pi))#\n", + "Ew=74.4*10**3#\n", + "Ds=56*d#\n", + "sigb=Ew*dw/Ds#\n", + "Wb=sigb*pi*(d**2)/4*10**-3#\n", + "l=20#\n", + "Ws=m*l#\n", + "a=1.2#\n", + "Wa=a*(W/2+Ws)*10**-3#\n", + "#Let the static load be Ps\n", + "Ps=(W/2+Ws)*9.81*10**-3#\n", + "#let the effective load be Peff\n", + "Peff=Ps+Wb+Wa#\n", + "FOS1=BL/Peff#\n", + "FOS2=BL/(5+0.612)#\n", + "print \" annual FOS is %0.2f \"%(FOS1)#\n", + "print \"\\n FOS neglecting bending load is %0.1f \"%(FOS2)#" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + " annual FOS is 5.02 \n", + "\n", + " FOS neglecting bending load is 13.9 \n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 24-3 - Page 636" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "d=12#\n", + "sigut=1960#\n", + "Pb=0.0025*sigut#\n", + "Ds=480#\n", + "F=Pb*d*Ds/2#\n", + "W=F*2*10**-3#\n", + "print \"W is %0.3f kN \"%(W)#" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "W is 28.224 kN \n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 24-4 - Page 637" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "sigut=1770#\n", + "Pb=0.0018*sigut#\n", + "W=4000#\n", + "a=2.5/2#\n", + "Ws=90*0.5#\n", + "Wa=(W+Ws)*a/9.81#\n", + "Weff=W+Wa#\n", + "d=sqrt(Weff*2/(23*Pb))#\n", + "d=12#\n", + "print \"d is %0.0f mm \"%(d)#" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "d is 12 mm \n" + ] + } + ], + "prompt_number": 4 + } + ], + "metadata": {} + } + ] +}
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