Analysing System of Equations: 2kx2 + kx1 = mx2 & 2kx1 + kx2 + kXocos(wt) = mx1

Click For Summary
SUMMARY

The discussion focuses on analyzing a system of equations defined by the second-order ordinary differential equations (ODEs): -2kx2 + kx1 = mx2'' and -2kx1 + kx2 + kXocos(wt) = mx1''. The derived solution for x2 is x2 = (k*xo*cos(wt)*(4k/m - 2w²))/(2m*(k/m - w²)*(3k/m - w²)), indicating that resonance occurs when the frequency w equals the system's natural frequencies, causing x2 to approach infinity. The participant expresses intent to solve for x1 subsequently and seeks confirmation on the correctness of the ODEs presented.

PREREQUISITES
  • Understanding of second-order ordinary differential equations (ODEs)
  • Familiarity with resonance phenomena in mechanical systems
  • Knowledge of mathematical manipulation of algebraic expressions
  • Basic concepts of harmonic motion and frequency analysis
NEXT STEPS
  • Explore methods for solving second-order ordinary differential equations
  • Research resonance conditions in mechanical systems
  • Learn about the implications of frequency in dynamic systems
  • Investigate the role of damping in oscillatory systems
USEFUL FOR

Students and professionals in physics and engineering, particularly those focused on dynamics, mechanical systems, and mathematical modeling of oscillations.

LCSphysicist
Messages
644
Reaction score
163
Homework Statement
All below
Relevant Equations
All below
1594617262371.png

Well, i think the important here is the system, what you think about?:

-2kx2 + kx1 = mx2''
-2kx1 + kx2 + kXocos(wt) = mx1''

After this, is just solve, i found:

x2 = (k*xo*cos(wt)*(4k/m - 2w²))/(2m*(k/m - w²)*(3k/m - w²))

The cool is that if we put w equal the two normal frequency x2 tends to infinity (so resonance in this case)

about x1 i will solve later, but before i want to know if at least the system is right
 
  • Like
Likes   Reactions: Delta2
Physics news on Phys.org
I agree with your ODEs.
 
  • Like
Likes   Reactions: LCSphysicist

Similar threads

Replies
4
Views
1K
  • · Replies 12 ·
Replies
12
Views
1K
Replies
12
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 14 ·
Replies
14
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
6
Views
3K
Replies
10
Views
3K
Replies
1
Views
3K
Replies
17
Views
3K