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Problems with MLPG and collocation
I fight with my models... Maybe can somebody of us help me...
I model the three dimensional body, those two sizes length and width are much larger then the thickness. For solving PDE i use MLPG Method. After defining my hexahedral support domain with MLS and hexahedral test doman with Heaviside function, i make the nodal integration. For that i divide the hole problem in hexahedrals, in the centers of those the particles are placed. Then i compute the surface of the hexahedrals in test domain through gauss quadratur to assemble the stiffness matrix
Follows problems occure:
- the excursion depends on the amount of nodes that i use. Why?
- if i change the material parameters also the form of excursion changes. What could be wrong?
- The size of the support domain hast also large influence.
Do i make something wrong?
If i use the collocation method for the solving of PDE i have also the problem that by changing of support domain the form and amount of execution changes. Is there any possibility to get the both meshless methods stable?
Thank you very much in advance.