5T (5/6) 
67 3/2T (1/3) k3 Bt 
py (n)= Be 
nKp )2 
Ko 
" 
pp (n) 
n 
FIG.1- SPECTRUM OF THERMAL VARIATIONS 
APPROXIMATED BY VON KARMAN 
INTERPOLATION FORMULA 
~—————— CASET: n= nj-n;, njol 
CASET: nj=nj;-n, n;< I 
_|_ J FIRST MAX. OF fy (n, n') 
2n "| FIRST MIN. OF f, (n,n) 
n= 
FIG. 2—PLOT OF FIRST MAXIMUM OF fy (n,n'), 
FIRST MINIMUM OF fg, (n,n) 
AND TERMINAL POINT OF THE 
SPECTRUM FUNCTION N (n) 
34 
