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  • Users: lusosa
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  1. lusosa

    Substantial differentiation matrix

    Hello, I am trying to understand better what the Nastran solutions are actually doing in the background, and upon studying the aeroelastic solution I learned that the matrix of aerodynamic influence is formed by: [Qkk] = [Skj] * [Ajj]^(-1) * [D1JK + i*k*D2JK] While I understand the...
  2. lusosa

    Creating a temporary matrix in a DMAP ALTER

    I am trying to create an alter where I generate a matrix and do something local and temporary with it. What I am doing right now looks like this: MATGEN ,/TEMP/2/N ADD TEMP,/X/3.0 Notice that X is a matrix already in the NDDL, but TEMP is not, it is something that I created temporarily for this...
  3. lusosa

    Getting a deeper understanding of NASTRAN

    Good afternoon (or whatever particular time it may be), I've been using NASTRAN for quite a while now (almost 5 years) and I am fairly familiar with how models are created, the basic logic of the program and I can read the most common bulk data entries. However, I still feel a bit lost about...

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