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assemble external force vector rather than the residual vector by comsol
Posted 31 mar 2016, 00:58 GMT-4 Interfacing, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers, Structural Mechanics 1 Reply
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Hi all,
In a simple linear elastic problem, a FE equation can be written as K*U=F, I would like to know if comsol can assemble and output this "F" vector?
In the documentation, it seems that comsol can output the residual vector "L" rather than "F".
Actually I need to output a vector which has the expression as: integrate(test(u)*w(x,y)) on domain or boundary, in which u is the dependent variable, and w(x,y) is the function I defined. I find this expression is in same format as the "F" vector mentioned above. So I need help to get the "F" vector or evaluate the vector with expression as integrate(test(u)*w(x,y)) directly.
Thank you all.
In a simple linear elastic problem, a FE equation can be written as K*U=F, I would like to know if comsol can assemble and output this "F" vector?
In the documentation, it seems that comsol can output the residual vector "L" rather than "F".
Actually I need to output a vector which has the expression as: integrate(test(u)*w(x,y)) on domain or boundary, in which u is the dependent variable, and w(x,y) is the function I defined. I find this expression is in same format as the "F" vector mentioned above. So I need help to get the "F" vector or evaluate the vector with expression as integrate(test(u)*w(x,y)) directly.
Thank you all.
1 Reply Last Post 31 mar 2016, 06:08 GMT-4
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Posted:
8 years ago
Can anybody help me? Thanks.