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  1. standingdouble

    Lusas warning help

    Hi! I have started to use Lusas, in order to do a modal analysis of vehicle-railway interaction. Since I'm a beginner I started with an easy test: a spring-damping-mass system.I modelled the viscoelastic joint creating a line (of unit lenght) between 2 nodes and choosing "joint no rotational...
  2. standingdouble

    Matrix inverse

    Hi! I need a subroutine for VB 6 to invert a matrix,I should use that in a program that solves hyperstatic structures,in other words to solve the system F=K*U (K stiffness matrix). I read of Gauss-Siedel method that would give me directly U=K^(-1)*F, but I wolud obtain also K^(-1) to check. In...

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