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Recent content by crashkeeper

  1. crashkeeper

    modal analysis of a structure with nonlinear behavior

    Hi! I need to make an modal analysis of a bridge with cables. The cables have nonlinear geometry behavior, so I have to turn on non linearity. To make a modal analysis i read that i need to activate prestress effects calculation. But when i do it, it says that i cant do a modal analysis with...
  2. crashkeeper

    Rotation of the principal axes of inertia.

    Hi, I would like to know, for a beam44, how to get the rotation angle of the principal axes of inertia from the global axes (theta). If i define Real Constants i have to input it, but if I use a cross section, ansys determine it automaticaly. how can I get it from the output? Thank you Diogo
  3. crashkeeper

    Real Constants and Section defenition conflict

    yes.. i tried before. it works now! thank you
  4. crashkeeper

    Real Constants and Section defenition conflict

    Well this is a huge problem that is compromosing my work.. It seems stupid but ill explain and i would really appreciate a good answer.. The model description is: 1. I have a model of a bridge with beam44 element. 2. The beam44 elements are defined with beam sections (not real constant) 3. I...
  5. crashkeeper

    Revolution joint COMBIN7 not there

    Hi people. I think i have a prob.. i cant find in my ansys 10 the element COMBIN7 for a revolution joint. The only elements of COMBINATION that i see are: Spring-damper 14 and Combination 40. I dunno what to do.. thanks for ur time
  6. crashkeeper

    Prestressed beam

    Hi everybody, does anybody knows how to applie the effect of a prestress tendon in a Beam44? the beam has a irregular shape and the prestress tendon is located in the edge of the beam, ie, it has eccentricity. The beam (beam44) is deffined by lines, ie, the axis, thats why i dont know who to...
  7. crashkeeper

    while cycle with functions

    but i need that call N(x) to augment the matrix. that means that i want to enlarge matrix A(x) with N(x) from the left to the right. If i remove N(x) i cant augment the matrix. i can do it manually, with no while cycle and i can do it too with a while cycle without functions. if i use constants...
  8. crashkeeper

    while cycle with functions

    Hi, i would like to do a while cycle with functions inside. i have tried but seems that mathcad dont like functions inside. what i want to do is augment a matrix i times like this: A(x)=| f(x) 0 | <- this is a matrix with a function | 0 f(x) | i want my while cycle to...
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