MATLAB



3.6 - 2


EIv = - (X(16,1) + X(17,1)*x- X(18,1)*x.^

2 / 2 - X(19,1)*x.^

3 / 6);

EIfi

= - (X(17,1) - X(18,1)*x- X(19,1)*x.^ 2 / 2);

Q = X(19,1); M = X(18,1) + X(19,1)*x;

subplot (2,2,1), plot (x, EIv); axis

([0 0.25 - 3 3]); grid on

subplot (2,2,2), plot (x, EIfi); axis ([0 0.25 - 6 6]); grid on

subplot (2,2,3), plot (x, Q); axis

([0 0.25 - 2 2]); grid on

subplot (2,2,4), plot (x, M); axis

([0 0.25 - 14 14]); grid on

). (

;
) .

= 0.25 : 0.001 : 1.0; m = 20.0;

EIv=-(X(16,1)+X(17,1)*x-X(18,1)*x.^ 2/2-X(19,1)*x.^ 3/6+m*(x-0.25).^ 2/2);

EIfi

= - (X(17,1) - X(18,1)*x- X(19,1)*x.^ 2 / 2+m*(x-0.25));

Q = X(19,1); M = X(18,1) + X(19,1)*x - m;

subplot (2,2,1), plot (x, EIv); axis

([0.25 1.0 - 3 3]); grid on

subplot (2,2,2), plot (x, EIfi); axis ([0.25 1.0 - 6 6]); grid on

subplot (2,2,3), plot (x, Q); axis

([0.25 1.0 - 2 2]); grid on

subplot (2,2,4), plot (x, M); axis

([0.25 1.0 - 15 15]); grid on

2-4

). (0;

) .

= 0 : 0.001 : 0.5;

EIv = - (X(16,1) + X(12,1)*x- X(13,1)*x.^

2 / 2 - X(14,1)*x.^

3 / 6);

EIfi

= - (X(12,1) - X(13,1)*x- X(14,1)*x.^ 2 / 2);

Q = X(14,1); M = X(13,1) + X(14,1)*x;

subplot (2,2,1), plot (x, EIv); axis

([0 0.5 - 3 3]); grid on

subplot (2,2,2), plot (x, EIfi); axis ([0 0.5 - 6 6]); grid on

subplot (2,2,3), plot (x, Q); axis

([0 0.5 - 2 2]); grid on

subplot (2,2,4), plot (x, M); axis

([0 0.5 - 15 15]); grid on

). (

;
) .

= 0.5 : 0.001 : 1.0; f = 60.0;

EIv=-(X(16,1)+X(12,1)*x-X(13,1)*x.^ 2/2-X(14,1)*x.^ 3/6+ f *(x-0.5).^ 3/6);

EIfi

= - (X(12,1) - X(13,1)*x- X(14,1)*x.^ 2 / 2+ f *(x-0.5).^ 2/2);

Q = X(14,1) - f; M = X(13,1) + X(14,1)*x - f *(x-0.5);

subplot (2,2,1), plot (x, EIv); axis

([0.5 1.0 - 3 3]); grid on

subplot (2,2,2), plot (x, EIfi); axis ([0.5 1.0 - 6 6]); grid on

subplot (2,2,3), plot (x, Q); axis