the inversion of large impedance matrix in MOM

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rahman
rahman 2015-9-14
评论： rahman 2015-9-16
Hi all
I try to analyse a structure using method of moment which produces large dense squared impedance matrix. when I try to solve the matrix equation A*X=B, the inversion procedure takes more than 4GB RAMs.Is there any idea to solve this matrix equation in reasonable time with less RAMs?
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Steven Lord
Steven Lord 2015-9-14
How large is your "large dense" matrix?
Are you using a 32-bit or 64-bit version of MATLAB?
Can you easily compute A*x for a vector x without explicitly creating the matrix A? If so, use one of the iterative solvers like GMRES.
rahman
rahman 2015-9-16
Tnx Steven Lord, GMRES is a good idea. It reduced about 2GB RAMs.

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Walter Roberson
Walter Roberson 2015-9-14
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rahman
rahman 2015-9-14
I try it but it takes more time with same RAMs!
Walter Roberson
Walter Roberson 2015-9-14
Then the answer to your original question is NO. Install more RAM if the current size is a problem.

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