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  1. standingdouble

    Lusas warning help

    thanks johnhors, ops,the answer is simply on the manual... Actually I focused my attention on the modal analysis section and didn't read well the joint section. now I understand why there are 3 nodes in the output. Furthermore today I made a comparison with some analytical results (from...
  2. standingdouble

    Lusas warning help

    -rb1957 you may be right with zero lenght of link element, but I can't set it properly in the mesh properties...Maybe I would ask to Lusas support -GregLocock this is the part of the output of the analisys,I removed some useless lines: E L E M E N T T O P O L O G Y ELEMENT...
  3. 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...
  4. 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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