Results of Eddy Current Analysis Of the DCLL TBM June 23, 2005 M. Ulrickson Presented on the TBM Conference Call Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000.
Summary There is a considerable torque about the center of the TBM There is a large twisting force trying to make a propeller blade The grids and the back plate have the greatest forces Forces are in the range of 100-1000 MN
Background Info Time slice shown is at the time of maximum eddy current (20 ms into a 40 ms linear decay) The units on the plots are force density (N/mm3) The force pattern is very complex and must be input into a finite element program to calculate stresses and loads. A fully time dependent calculation will have to be done eventually.
Fmod Backplate
FX Backplate
Fz Backplate
Fmod Grid
Fx Grid
Fy Grid
Fz Grid (front)
Fz Grid (reverse side)