. . , . , , () . , .
.
, .
, . S, S = D d.
, . N, N = d D.
, (S = -N), (N = -S).
, , , . .1.2.
.2. 1 2
, , :
Smax = Dmax dmin = ES ei; Smin = Dmin dmax = EI es;
S = (Smax + Smin) / 2.
. , , .. Smin = 0. (. 2, ).
: , , :
Nmax = dmax Dmin = es EI; Nmin = dmin Dmax = ei ES;
N = (Nmax + Nmin) / 2.
. (. . 2, ).
, , . . (..2, ).
- , , . .
( TS ) ( TN ), , , :
TS = Smax Smin; TN = Nmax Nmin; Tn = Nmax + Smax,
TS = TD + Td; TN = TD + Td; Tn = TD + Td.
: 40 0,03 / +0,003, 40 , , , .