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{
"metadata": {
"name": "",
"signature": "sha256:4671074782cd36f56500529820b222f929e1453d2be6b38ad8ab85fd8d868d5a"
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter12-Ultrasonics"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex1-pg295"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 12.1\n",
"##calculation of natural frequency,magnetostriction\n",
"\n",
"##given values\n",
"\n",
"l=40*10**-3.;##length of pure iron rod\n",
"d=7.25*10**3.;##density of iron in kg/m**3\n",
"Y=115*10**9.;##Young's modulus in N/m**2 \n",
"\n",
"##calculation\n",
"f=(1*math.sqrt(Y/d))/(2.*l);\n",
"print'%s %.2f %s'%('the natural frequency(in kHz) is',f*10**-3,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"the natural frequency(in kHz) is 49.78 \n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex2-pg297"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 12.2\n",
"##calculation of natural frequency\n",
"\n",
"##given values\n",
"\n",
"t=5.5*10**-3.;##thickness in m\n",
"d=2.65*10**3.;##density in kg/m**3\n",
"Y=8*10**10.;##Young's modulus in N/m**2 \n",
"\n",
"\n",
"##calculation\n",
"f=(math.sqrt(Y/d))/(2.*t);##frequency in hertz\n",
"print'%s %.2f %s'%('the natural frequency(in kHz) is',f*10**-3,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"the natural frequency(in kHz) is 499.49 \n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex3-pg301"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 12.3\n",
"##calculation of depth and wavelength\n",
"\n",
"##given values\n",
"\n",
"f=.07*10**6;##frequency in Hz\n",
"t=.65;##time taken for pulse to return\n",
"v=1700.;##velocity of sound in sea water in m/s\n",
"\n",
"##calculation\n",
"d=v*t/2.;##\n",
"print'%s %.2f %s'%('the depth of sea(in m) is',d,'');\n",
"l=v/f;##wavelenght of pulse in m\n",
"print'%s %.2f %s'%('wavelength of pulse (in cm)is',l*10**2,'');"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"the depth of sea(in m) is 552.50 \n",
"wavelength of pulse (in cm)is 2.43 \n"
]
}
],
"prompt_number": 1
}
],
"metadata": {}
}
]
}
|
