Integral Function Fails to Solve

Forum|Forum|4 years ago
September 22, 2021
4 replies
2301 views

FOR A REASON OR ANOTHER THE SOLVER DOESN'T PERFORM THE INTEGRATION.

The program is typically solving for Int [a to b] (Ax+B)^(-3) dx.

--------However, I have several Matrices defined.-------

Initially the first matrix in the Integrand function resulted in errror : <Not a Singular Matrix.>

Thus recognizing the matrix as x, I redefined x as xn, and dxn. Please see Theta2 equation.

I know the solution, I wish for the program to simplify future problems.

1_Beam_Principle-of-Virtual-Work.zip

Best answer by ttokoro

Prime7

Without units "m" and x2:=x[2 and x3:=x[3

W

Werner_E

25-Diamond I

Not sure if thats what you'd like to achieve, but why do you use symbolic evaluations? You quickly get the numeric result by using the normal numeric evaluation (=)

In case of theta1 you did not defined E and so you see E in the symbolic result. If this was a mistake, then define E and again use numeric eval. If it was no mistake you could make theta1 a function of E and (numerically) evaluate at various values for E if thats what you are after.

BTW, I guess the reason why the symbolics fails are the units of the integral limits. The symbolics doesn't know anything about units!

C

Civil_E_Refugio

Author

5-Regular Member

No Sabía :: I didn't know

@Werner_E wrote:

Not sure if thats what you'd like to achieve, but why do you use symbolic evaluations? You quickly get the numeric result by using the normal numeric evaluation (=)

In case of theta1 you did not defined E and so you see E in the symbolic result. If this was a mistake, then define E and again use numeric eval. If it was no mistake you could make theta1 a function of E and (numerically) evaluate at various values for E if thats what you are after.

BTW, I guess the reason why the symbolics fails are the units of the integral limits. The symbolics doesn't know anything about units!