newlam

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Anyone out there, pls help.

Anyone out there, pls help.

Thank Preben Alsholm for a clear explanation. However, I really need to include the boudary of the form D[2](w)(s,t) which is velocity feedback at the top end of a beam. How can I apply such the boundary condition.

Cheers,

newlam

Thank Preben Alsholm for a clear explanation. However, I really need to include the boudary of the form D[2](w)(s,t) which is velocity feedback at the top end of a beam. How can I apply such the boundary condition.

Cheers,

newlam

Thank to longrob, Preben Alsholm and Robert Israel. I fixed the problem with variables and got another one with my BCs. Maple does not allow me to include velocity feedback in the form of (D[2](wx))(2000, t) in my BCs

Error, (in pdsolve/numeric/process_IBCs) initial/boundary conditions can only contain derivatives which are normal to the boundary, got (D[2](wx))(2000, t)

 Does anyone know how to overcome this? Thank you.

Thank you Robert Israel. The problem is fixed.

Thank you Robert Israel. The problem is fixed.

independent.mw

 

It is attached now...

Thank you acer. I'm so new to Maple and I'm affraid that anthing from my worksheet will be terrible to understand. I just post a new question. Please have a look.

http://www.mapleprimes.com/questions/123851-Numerically-Solve-A-Fourth-Pde

Boundary conditions

wss(L,t)=wss(0,t)=w(0,t)=0

-Bwsss(L,t)+Ft(L,t)[ws(L,t)+rs0(L,t)]=k1wt(L,t)+k2ws(L,t)

Initial conditions

 w(s,t0)=g1(s), wt(s,t0)=g2(s)

where w and r0 are two components of a position vector r=w+r0 (r0 is placed vertically and w is perpendicular to r0) in three dimensional coordinate (OXYZ), z is Z-value of the vector r(s,t). I need to plot w in X, Y and Z directions. I having difficulties to put the pde into Maple. Could anyone shows me a way to go.

Any helps and guidance would be appreciated.

Cheers

Newlam

 

I copied equations from maple worksheet and posted it here. Can you guys see anything?

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