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Recent content by giacuni

  1. giacuni

    Initial Strain within a elastic element

    Hello everyone, I am trying to simulate the accumulated deformation after several cycles (passage of a train) in a railway track. My idea is that, after each cycle, the vertical permanent deformation is calculated using an empirical equation. Then, at the end of the cycle, the vertical...
  2. giacuni

    How to assign the gravitational load only to point masses

    Hi, I'm trying to model a 2D model of a railway track but I have encountered a problem. Basically, my model is made of: - the ground: with 9 sublayers - the ballast - the sleepers - the rail pads - the rail - and the train I'm doing a dynamic analysis, in which the only load is the gravitational...
  3. giacuni

    Simple Question: 2D vs 3D Pressure Load

    Hello, I am doing a calibration of a 2D model using a 3D model as a reference. Basically, I am applying a surface pressure to the 3D model and then applying the same pressure to the 2D model. The question is (probably is a dumb question) if in the 2D model id 400 kPa the pressure and it is...
  4. giacuni

    Moving load model in a simply supported beam

    Thanks for your answer. I take this opportunity to wish you merry Christmas. Back to the problem. 1. I have tried to use the velocity boundary condition instead of the displacement boundary condition but the result is the same. 2. I have the version Abaqus/CAE 6.14-5 (of the University). I...
  5. giacuni

    Moving load model in a simply supported beam

    Thanks for the interest. The ALLKE peaks at the end. The ALLVE is constant to zero. What does it tell that? I used an implicit dynamic analysis. I used a beam with 100 elements. I chose as time step: 0.00499266 seconds. Which is the time that occurs to the load to go to an element to an...
  6. giacuni

    Moving load model in a simply supported beam

    Hi, thanks for the interest. Here is the plot of the energies: What can I see is that: - the total energy (ETOTAL) is linear (and may be this is not good thing as I remember that should be better if it was constant). - the artificial strain (ALLAE), the damping dissipation (AALVD) are...
  7. giacuni

    Moving load model in a simply supported beam

    Hello! I am doing a simple model: a moving load along a simply supported beam as depicted in the figure below Basically, I've modeled the moving load as a load applied at a reference point and then used a boundary conditions in order to move it. The model works. The problem is that I...
  8. giacuni

    simple supported beam subjected to moving sprung mass

    Hello, I would like to ask, if you have time, to help me to solve a simple model problem in ABAQUS. I’m trying to model a simple supported beam subjected to moving sprung mass. This should represent the movement of a train travelling over a rail with constant speed v. The rail is modeled as a...
  9. giacuni

    Simpe Winkler Beam Foundation Model

    Ok, now I've used those but there is a huge difference between the model and the analytical solution. https://s11.postimg.org/5cpw9pqs3/cvc.jpg https://s18.postimg.org/xpu5vqmux/nhnh.jpg It seems that the springs dont act.
  10. giacuni

    Simpe Winkler Beam Foundation Model

    Thank you for your help! I've partitioned the beam in the points in which I want the springs https://s22.postimg.org/m1eds9n41/image.jpg The problem is that when I want to create the springs (from "Springs/Dashpot") it requires 2 nodes. I have the nodes in the beam, but how can I create the...
  11. giacuni

    Simpe Winkler Beam Foundation Model

    Hello! I am new to ABAQUS and I have trouble to model a simple problem. I have to model a rail on an elastic foundation with BOEF model: the rail is a beam and is above a series of springs that model the sleepers, ballast,etc. My model consists in: - 1 beam of 10 meters (the rail), modeled as a...
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