- Structure CAD


- 2


20.2.2.

, ( , ) , . .

[K]{u} = {p}. (20.1)

. {uo}, {u},

{u} = [D]{uo}. (20.2)

[K]

[Ko] = [D]T[K][D], (20.3)

[Ko] - ,

[Ko]{uo} = [D]T{p} (20.4)

[Ko]-1.

, {u} (20.4) (20.2) {d},

{u} = [D]{uo} + {d} = [D][Ko]-1[D]T + {d} (20.5)

(20.5) (20.1)

[K]{d} = ([E] - [K][D][Ko]-1[D]T){p} = [S]{p}. (20.6)

,

[D]T[S] = [D]T - [D]T[K][D][Ko]-1[D]T =

= [D]T

- [Ko][Ko]-1[D]T = [D]T - [D]T

= [0], (20.7)

{x} (20.1) {xo} (20.4)

([D]{xo})() = {xo}[D][S]{x} = 0. (20.8)