David Mark Koenig

5 Questions 11 Answers 0 Followers

Questions related from David Mark Koenig

Why do strings of finite length with rigid end points not invert when struck in the middle?

Finite length flexible strings with rigid end conditions when struck at somewhere other than the middle, say at 1/8th of the string's length, produce a pulse that propagates toward the boundary...

22 October 2018 1,079 1 View

What is the physical interpretation of the double Laplacian that occurs in the theory of plates?

For example, the first order Laplacian measures the difference between the local and average values of a quantity in an infinitesimal neighborhood of the point in question. So, for a flexible...

30 April 2015 8,296 7 View

What is the force of a vibrating surface acting on a point mass?

A point mass is placed on a surface at (x,y) which is undulating. That is, the surface’s transverse or vertical displacement w(x,y,t) is moving as a function of time. What is the vertical or...

03 April 2015 2,379 2 View

What is the difference between symmetric and asymmetric eigenvalues?

On pp. 206-212 in Nowacki's "Dynamics of Elastics Systems", a pde is solved for the transverse vibrations of a rectangular plate subject to clamped boundaries. Two equations are developed for the...

19 January 2015 6,298 4 View

What are the Boundary conditions for a Vibrating Plate Composed of Two Materials?

For a rectangular plate with one half made of material A and the other half made of material B, what would the boundary conditions be at the interface?

26 December 2014 5,238 7 View