pyNastran  0.5.0
pyNastran BDF Reader/Writer, OP2 Parser, and GUI
inertiaFormulas.py File Reference

Go to the source code of this file.

Packages

namespace  inertiaFormulas

Functions

def inertiaFormulas.bar
 The purpose of this code is to automatically generate the moment of inertia equations.
def inertiaFormulas.cross
 y b1 ^ b3 | b2 a---p1--b | | | h1 k--l | c-----d | | | | o---------p2-> x h2 | | j--i f-----e | | h3 | | h-------g
def inertiaFormulas.box
 y ^ | w1 | w2 w3 | a-----p1------b | | | h1 | e--|----f | | | | | | | | | | | h2 | | o-------|--> x | | | | | h-------g | | | h3 d-------------c
def inertiaFormulas.Box1
 y ^ | w1 | w2 w3 | a-----p1------b | | | h1 | e--|----f | | | | | | | | | | | h2 | | o-------|--> x | | | | | h-------g | | | h3 d-------------c
def inertiaFormulas.T
 y ^ | a---k-p1-l---b | | | h1 | | | h---g | d---c | | | | o----------> x | | | | h2 j f----e i w1 w2 w3
def inertiaFormulas.Ixx
 from http://en.wikipedia.org/wiki/Second_moment_of_area J_{xx} = {1}{12} {i = 1}^{n-1} ( y_i^2 + y_i y_{i+1} + y_{i+1}^2 ) a_i J_{yy} = {1}{12} {i = 1}^{n-1} ( x_i^2 + x_i x_{i+1} + x_{i+1}^2 ) a_i J_{xy} = {1}{24} {i = 1}^{n-1} ( x_i y_{i+1} + 2 x_i y_i + 2 x_{i+1} y_{i+1} + x_{i+1} y_i ) a_i
def inertiaFormulas.add
def inertiaFormulas.sub
def inertiaFormulas.subx
def inertiaFormulas.suby
def inertiaFormulas.addx
def inertiaFormulas.addy
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