Hi Max, I could export the CAD drawing in IGES format. Could you please suggest how to create NASTRAN bulk data file from IGES? I am also attaching the iges file for your kind reference. I'd like to set the mesh size equal to the distance between two adjacent vertices.I hope the coordinates of the vertices can be obtained from iges file.
Regarding what was mentioned in the previous email, " extract point and line data etc." could you please elaborate a bit on this? I think by points you mean coordinates of the vertices. Does line data mean the length of the line, which is the distance between two vertices? Thanks a lot, Deepa On Fri, Feb 7, 2020 at 11:15 PM Max Orok <[email protected]> wrote: > You're welcome Deepa! There may be some semi-automatic sweetspot if you > can extract point and line data etc. > > On Fri, Feb 7, 2020 at 9:53 AM Deepa <[email protected]> wrote: > >> Hi Max, >> >> I have to create multiple geometries Iike this. I'll try and find out how >> to create the drawing in the formats that you mentioned. >> >> Thanks a lot, >> Deepa >> >> On Fri 7 Feb, 2020, 7:27 PM Max Orok, <[email protected]> wrote: >> >>> I'm not sure dwg or dwf is supported, but I know you can import STEP, >>> IGES or BREP. >>> >>> If it's just the one geometry I think you could manually specify it like >>> we did for a single line, but make sure that >>> the lines are connected at those points. >>> >>> >>> On Fri, Feb 7, 2020 at 8:04 AM Deepa <[email protected]> wrote: >>> >>>> Hi Max, >>>> >>>> Thanks a lot. It works like a charm! >>>> >>>> I'd like to know if it is possible to create NASTRAN bulk data file for >>>> geometries like the following >>>> >>>> [image: Untitled.png] >>>> >>>> I have the geometry in dwg and dxf file format created from AutoCAD. >>>> Basically, I have specified coordinate positions to create points at every >>>> delx= say,0.5 in CAD. >>>> >>>> Many thanks, >>>> Deepa >>>> >>>> On Fri, Feb 7, 2020 at 1:52 AM Max Orok <[email protected]> wrote: >>>> >>>>> Using the python api, building on Jeremy's nice example, but omitting >>>>> physical groups: >>>>> >>>>> ----- >>>>> import gmsh >>>>> >>>>> delx = 0.5 >>>>> xend = 20 >>>>> >>>>> gmsh.initialize() >>>>> >>>>> point_a = gmsh.model.geo.addPoint(0.0, 0.0, 0.0, meshSize=delx) >>>>> point_b = gmsh.model.geo.addPoint(20.0, 0.0, 0.0, meshSize=delx) >>>>> >>>>> line = gmsh.model.geo.addLine(point_a, point_b) >>>>> >>>>> gmsh.model.geo.synchronize() >>>>> >>>>> # make a 1d mesh >>>>> gmsh.model.mesh.generate(1) >>>>> >>>>> # save the mesh as a NASTRAN bulk data file >>>>> gmsh.write("line.bdf") >>>>> >>>>> gmsh.finalize() >>>>> ----- >>>>> >>>>> Sincerely, >>>>> Max >>>>> >>>>> On Thu, Feb 6, 2020 at 1:25 PM Jeremy Theler <[email protected]> >>>>> wrote: >>>>> >>>>>> delx = 0.5; >>>>>> xend = 20; >>>>>> Point(1) = {0, 0, 0, delx}; >>>>>> Point(2) = {xend, 0, 0, delx}; >>>>>> >>>>>> Line(1) = {1, 2}; >>>>>> >>>>>> Physical Point("left") = {1}; >>>>>> Physical Point("right") = {2}; >>>>>> Physical Line("bulk") = {1}; >>>>>> >>>>>> On Thu, 2020-02-06 at 23:11 +0530, Deepa wrote: >>>>>> > > >>>>>> > > I am a beginner here. >>>>>> > > >>>>>> > > I'm looking for ways of creating a mesh for a 2D geometry. It's a >>>>>> > > straight line, the nodes have to be positioned along the x >>>>>> > > directions and all y-coordinates have to be zero. >>>>>> > > >>>>>> > > Example: 0 : delx : xend, where delx =0.5, xend = 20. >>>>>> > > >>>>>> > > I have to create the input file in a format that will be >>>>>> compatible >>>>>> > > for importing in COMSOL. >>>>>> > > >>>>>> > > Any suggestions on how to proceed will be really helpful >>>>>> > > >>>>>> > > Thanks, >>>>>> > > Deepa >>>>>> > > >>>>>> > > >>>>>> > >>>>>> > _______________________________________________ >>>>>> > gmsh mailing list >>>>>> > [email protected] >>>>>> > >>>>>> > http://onelab.info/mailman/listinfo/gmsh >>>>>> > >>>>>> > >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> gmsh mailing list >>>>>> [email protected] >>>>>> http://onelab.info/mailman/listinfo/gmsh >>>>>> >>>>> >>>>> >>>>> -- >>>>> Max Orok >>>>> Contractor >>>>> www.mevex.com >>>>> >>>>> >>>>> >>> >>> -- >>> Max Orok >>> Contractor >>> www.mevex.com >>> >>> >>> > > -- > Max Orok > Contractor > www.mevex.com > > >
test2_gmsh.iges
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