101_Problem CHAPTER 9

101_Problem CHAPTER 9 - PROBLEM 9.85 For the quarter...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
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: 44 82 xy I aI a π == Problem 9.67: 4 1 2 xy I a = Now, Equation (9.25): 4 1 2 2 2 tan 2 xy m a I II aa θ ππ    =− 8 0.84883 3 Then 2 40.326 and 220.326 m = °° or 20.2 and 110.2 m = W Also, Equation (9.27): 2 2 max, min 22 xy I I +− + 1
Background image of page 1
This is the end of the preview. Sign up to 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.

Ask a homework question - tutors are online