PROBLEM 9.85 For the quarter ellipse of Problem 9.67, determine the orientation of the principal axes at the origin and the corresponding values of the moments of inertia. SOLUTION From Problem 9.79: 4482xyIaIaπ==Problem 9.67: 412xyIa=Now, Equation (9.25): 41222tan 2xymaIIIaaθππ=−−−80.848833Then 240.326 and 220.326m=°°or 20.2 and 110.2m=WAlso, Equation (9.27): 22max, min22xyII+−=±+1
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 07/11/2011 for the course EGM 2511 taught by Professor Jenkins during the Spring '08 term at University of Florida.