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Found 10 results

  1. Hi all, I am looking out for any examples to write stress/node id data to excel sheet TWAPI in Tcl/Tk. Thanks in advance, Regrads, Girish C Hirekerur
  2. Hi, I performed topology optimization (Upper bound displacement and minimize volfrac). But I am having problem in interpreting results. Please clear following doubts: 1) Results are very irregular. It doesn't show some material removal in some uniform shape. 2) Which iso-value should I consider? What is the use of it? 3) When I try to export it using OSSmooth, It takes input of .GRID file which I couldn't find anywhere in the folder. How do I get that .grid file.
  3. TIME_AVERAGE_OUTPUT This type of output is a simple average. The value that is printed in the output file is computed as follows:UTimeAve = sum( U_n )/n, where n = the step number. The reset_frequency tells AcuSolve to start the time averaging procedure over by deleting the previous time averaged field, setting n=0, then starting the process out with a fresh set of values. Note that these values are not carried forward across restarts. So, every time you restart AcuSolve, the time average output is reinitialized. RUNNING_AVERAGE_OUTPUT This type of output uses a weighted average to compute the output value. This is useful for cases where you may want to weight the initial time steps less as the flow field is developing. The value that is printed in the output file is computed as follows: URunAve = 1/N*U_n + (1-1/N)*URunAve_n-1. Where N = min(step,N_max), step= the current time step number, and N_max=running_average_steps. The running_average_steps parameter is set in the EQUATION command. So, setting the running_average_steps essentially defines an averaging "window" over which to compute the output. This value is carried forward across restarts, and may also be initialized using the NODAL_INITIAL_CONDITION command. Note that TIME_AVERAGE_OUTPUT is simply an output quantity, whereas the RUNNING_AVERAGE_OUTPUT field is used in other areas internal to AcuSolve such as the non-reflecting boundary conditions, and running_average_wall_function. Both types of output can be visualized using Fieldview, Ensight, and Paraview. They are included in the extended output variables when using acuTrans to convert nodal output. Here is an example: acuTrans -out -to fieldview -extout If either TIME_AVERAGE_OUTPUT or RUNNING_AVERAGE_OUTPUT are defined, their variables will be written into the output file.
  4. The strain_rate_invariant_2 (I_2) is defined as follows: I_2 = 2*Delta_s(Velocity):Delta_s(Velocity) Where: Delta_s denotes the symmetric gradient operator and ":" is tensor contraction. To obtain the magnitude of the strain rate, the square root of the strain_rate_invariant_2 should be used.
  5. The syntax for conditionals is as follows: if condition1: expression elif condition2: expression else: expression Depending on the desired function, elif and else are optional. See attached image.
  6. Hi, I would like to export all the pages in my hyperview with required screen resolution. In Hyperview there is an option in Menu- Export* - Multiple Images - old/Advanced where I can specify width and height seperatly. But this option is restrictred to 'Export each window separately total page size'. This means If i have 4 windows in a page this option is exporting images of individual window with specified resolution. I would like to export all the pages with required width and height. At present I am trying to using command window with following commands by opening every page: hwi GetSessionHandle sess sess CaptureScreenToSize png 01.png 1400 593 I am trying to write a tcl/tpl script to automate this process (Export all pages with given width and height). It would be appreciated if someone can help me with this code. Thanks in advance Agassi
  7. The Lighthill stress tensor is constructed by taking derivatives of the velocity field. It is possible to build all terms of the Lighthill stress tensor within a post processing package (Fieldview, Ensight, or Paraview) by using the function calculator. To make this calculation efficient, it is suggested that the -extout flag is used on acuTrans when converting the solution to the post-processor format. This writes the velocity gradients to the file. The velocity gradients can then be assembled appropriately in the post processing package to form the Lighthill stress tensor without havin to compute each derivative in the post processor. The divergence of the Lighthill stress tensor is typically used for visualizing the acoustic source strength. Creating and animating isosurfaces of divT can provide insight into the acoustic source characteristics.
  8. Hello together, I was wondering if there are some kind of tutorials or explanations of the post-processing plots of HyperStudy. I'm trying to understand how ever data set in HyperStudy is been calculated and how every plot is created. Especially the pareto plot, the ordination plot and the linear effects plot are interesting to me. In all the ebooks and overviews I've read hasn't been a complete explanation how HyperStudy creates these plots. Are there some video tutorials or pdf documents where maybe an example is calculated to show which methods are used? It would be a great help if someone has any documents, videos or experiences where I can get this information. I can't really estimate if this is already to deep into learning the program or maybe I just didn't find the right files. I hope somebody can help me out on this topic. Cheers Max
  9. I have created a double sided fillet weld geometry with three plates. This was modeled using solid and shell plate techniques. The case belongs to a normal tensile loading (along X direction as per global coordinate system). Hence, it should ideally possess sigma XX in both the cases. But stress (sigma XX) in shell model is almost 0.25 times the stress obtained in solid model. The stress has been determined at a point farther away from weld, so weld modeling would not be affecting the value in the two cases. This ratio has been consistent even at different load values. I have also iterated the element size varying from 0.5 mm to 3 mm but the deviation has been consistent. So, mesh refinement might not be the reason for this. Please anyone enlighten me with the possible causes. Thanking you in anticipation. P.S : I have attached the simulation file (.fem files) for both the cases. Regards Venkatesh 3_plt_welds_shell_1_model.fem 3_plt_welds.fem
  10. after performing topology optimization, I don't know the stress contour and displacement contour for the optimized structure ( Last iteration) are for which iso value specifically? Because by changing the iso value the structure modifies, however the stress and displacement contour for the last iteration stay unchanged.
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