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Hi cwharpe, Created a slice of the left face with revolve (1 element per thickness), disconnect slice elements, reposition that slice with rotation on the opposite side, bond and the model is ready for Cyclic Symmetry.
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I have found something cool experimenting with ccx that could be interesting and easy to implement on a future version. Ccx allows multiple Cyclic Symmetries in the same model. I didn't know that was possible, but it is described in the manual. It …
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There is a way to sort the incompatibility of nodes position between Master and Slave faces for Cyclic symmetry with the internal solver. Ideally this should be done in the phase of model preparation. It requires to leave the model 0.1º-0.2º short .…
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Hi Prop, I have had an insight about your comment: "it just repeated each blade individually, instead of them being all in one mode, like it should be". Be sure to add the perturbation parameter for the contacts to keep working the whole analysis…
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¿Why don't you tie the different sectors to build the full model?. It works fine and Frequencies match with the Cyclic model. The center hole is not really a bug. ND need a special treatment when there are some elements on the axis of rotation. I…
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Thanks for sharing, Anthony. Those are excellent and beautiful files to work with.
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Boundary condition outside the STEP block can be defined as usual in Mecway. No need to change that. You need to modify the STEP by first "don't generate the Step" and later write it yourself. Centrif can be NLGEOM if you need it. Prop_design recom…
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Thanks John, That's exactly what I was looking for.
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HI Victor, I would like to suggest that the node/Element List tool were able to sort by element, shape , component, or material. Sometimes , some elements with different shape get mixed in between the mesh like in the picture. Ordering by shape in…
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ccx. It's all described in the first post. Including ccx cards. Read the procedure carefully or you can skip some important modes.
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"¿What if the first 10 modes are all in the highest ND?" I don't think that's possible. Anyway, the first extraction would have shown all the first positions occupied by the last ND. On a second run the user would have to increase just the highest …
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OMG!!. Congratulations Victor. I can't believe how fast it is.
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Hi Victor, I would say there is a best way to extract the modes when combining Frequency + Cyclic Symmetry. Let me know what do you think? -One can request a steeped number of modes (we can talk about that later). -Sort the frequencies and take …
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Hi JohnM and thanks for sharing your real-world experience on the subject, I really appreciate it. I'm not questioning how many modes should be reviewed, what I'm exposing is that if the designer request 10 modes (he will know why) there is no need…
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@prop_design I have sent to you a private message.
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I need to dig more but I suspect modes always start to fill from below. That would mean Nodal Diameter 0 is always E, Nodal Diameter 1 always T,.... I was also afraid that the shape may depend on the number of modes but that’s not the case. Given th…
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I have seen a reduction in time extracting the modes up to a 400%. This morning I have wake up remembering a conversation long time ago with a friend of mine. If a non-speaking English person try to predict the next letter in a text will probably c…
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Some time ago you posted a very beautiful rotor liml file. ¿Do you mind if I post some images to explain what I'm talking about?.
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Hi @prop_design I'm not sure if what I have exposed has been understood. ¿How many modes have you request in your 7 Blade Rotor?
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If we could find the way to cleverly steep the number of requested modes , my model could as example, be correctly computed from 5:42 min to 02:08 (extracting the right modes). This is now possible because I know a priori the occurrence of each Noda…
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¿Would it be possible to see that model?. It's almost impossible to help without it . It could be a completely random or even a simple error. Maybe in private @hooshsim.? @prop_design? It almost seems we are talking about different models and prob…
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I would add something else. Be sure to set up "Number of segments to output to 1".
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i see that the modes aren't the same Hi prop_design, ¿Could you share that model?. I have recently been working on Cyclic symmetry and the agreement was very good. Regards
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Mecway seems to be doing very well. You've made someone nervous and you already have your own haters.
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The Center of mass was a nice check ...Additionally: -Same Density/Mass? -Same Orientation in 3D Space? I would perform a fast Modal vibration analysis to see if they both agree. Request 12 modes and pay attention also to the first six and how sma…
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Wow!!. It worked nice and soft. Thanks for sharing.
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. Thanks
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Hi JhonM, Thanks for comment. I'm still working on this model . My goal during last weeks has been to get a model in which I can validate the Strain energy density for hyperleastic material models. I think this could be finally the right direction.…
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Even more fun with Neo Hookean bouncing ball
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What a blunder. I'm using contact thermal conductance =0 instead. Thank you Victor.
