- Structure CAD



, .. f = f(t), , dZ/dt d2Z/dt2 .

J(t) = M(d2Z/dt2) (19.11)

, ,

M(d2Z/dt2) + KZ(t) = f(t). (19.12)

, , ( ).

( ) ,

Z(t) = Ysin(wt + j). (19.13)

(19.13) Y ( ), w , j . (19.13) (19.12) , f(t) = 0

(K - w2M) Y= 0, (19.14)

, wi (i = 1,...,n), , (K - w2M). Yi