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Hypermesh Radioss Tutorial [Dynamic Analysis]
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- čas přidán 15. 08. 2024
- In this Hypermesh Radioss Tutorial, we will perform a dynamic analysis using SPH method. We will simulate a multiple bird-strike scenario in which a high velocity impact occurs between birds and an aircraft windshield assembly. Radioss solver will be used to run this explicit dynamic analysis.
CAD Model Link : drive.google.c...
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In Radioss 2024, when generate SPH: "mass definition" it's material density (when you choose Method: Material density). I write this because I was thinking - density automatically will get from material property's, and "definitions" is specific equation for calculating mass. All works. Thanks for tutorials, Aeroswap!
I was expecting this one and your presentation was to the point! Thank you for your effort Swapnil. I am still curious to see how this set up will work with a composite structure.
Thanks! I plan to do a video about rigid impact on a composite wall and then probably replicate the same with the rigid object replaced by sph!
Will start working on that soon :)
@@Aeroswap It will be extremely beneficial for me. Thank you, Swapnil.
Hi Sir could you please tell what is the necessary for creating the card image as part and sir one more thing while creating the mat 27 card for the glass does the parameter E mean that the elastic modulus of glass is 60000, is it from any reference or something
Hello,
It is the way Radioss solver works. Every component with card image as PART is considered separately in the calculation of output parameters. If you do not change card image to PART, the component will be neglected or the solver will show some error. Note that this is not applicable for rigid components. They can have blank card image.
Yes, E is Youngs modulus. I have taken these material values from material database. This data can be obtained from several websites on the internet.
@@Aeroswap Thanks a lot sir
@@Aeroswap Sir I more doubt when do we generally use SPH methods ? When I googled out some info showed in a solid -fluid interaction problems then why here?
SPH can be helpful to predict the behaviour of soft materials. So yes, we can perform solid-liquid interaction analyses using SPH. Another great application is shown in this tutorial, bird strike! A bird can be considered to be made of soft material in real life case. SPH can provide realistic results for birdstrike tests. This method is also used in impact tests for brittle or composite materials to capture the damage results accurately.
The only drawback of SPH method is that the solution takes more time to solve. To get the desired level of accuracy, very fine mesh has to be generated for SPH component and this in turn increasing the solver run time.
@@Aeroswap Thanks a lot for the clarification
Hello, I have homework in Hyperworks desktop and I can not see 'Radioss' in 'Analysis'. Can you help me?
Aslo, I tried with solving the 40components but during reviewing the contact type 7 all master and slave components are blue in color
Bro such an informative video👍👌, I had stumbled on an obstacle, while meshing headlining with cutout for sunroof assembly. The headlining component and the skin component together was merged into a single component. I'm unable to get midsurface properly and other jugads (surface pair, offsetting surface) for midsurface also failing. Pls help, I'm using HM13. Pls pls help.
If the edge of the sunroof is clearly visible, a line geometry can be extracted.
Create a temp component. Now go to Lines tab in geometry panel. Using the extract lines option, you can extract surfaces edges as lines.
Then, by using solid edit, trim all the solids with these extracted lines. The unwanted part will get separated from the sunroof and can be easily deleted.
Hope it works, let me know how it goes!
i like this video..Thanks.
But can you make video which will describe the difference between implicit and explicit analysis( hm-Lsdyna /radioss) with examples.
Sure. In simple terms, implicit/explicit is just the solution approach implemented by the solver. We can perform any dynamic analysis with either of these methods and obtain fairly similar results.
Thanks for the suggestion! I will work on this 👍🏻
Hi dude, i have a question. In my analysis, after run, the A001... A100 arent available. You know why it happens?
i'm using the 2022.1 hyper version
Hi Pabllo, this is probably the result of incorrect control card definitions. Please make sure that the TFILE and ANIM_DT cards are properly defined as shown in the video.
Excellent ! For me the only hard part is to find the correct information to fulfill the material property.
What will be the difference if we put bird as master nodes and plane as slave nodes ? Why in this tutorial are we working with the solver browser and not in the model browser like the simulation of the bullet ?
Hey Harry, good to know you liked the video!
Yes, finding the right material data and converting it to required units is a tedious job. Unfortunately, there is no workaround for this!
As a general rule of thumb, a moving part is always considered as slave and fixed part as master. That is why the bird nodes are slave entities in this simulation. But you can always experiment doing it the other way. I do not think it will cause any errors in the run.
Good question about the solver browser. If you notice, the bullet video was recorded with HM 2019. Now I have switched to the latest version 2021. There are some major changes in the workflow. For example, the velocity cannot be created using the model browser anymore. The BCs manager from Tools panel is also removed. The new method to create velocity loads is through the solver browser. Using the solver browser also helps to add some solver specific paramaters easily which would be difficult with the model browser. Hence, the change :)
@@Aeroswap Thanks for the answer. Yes i don’t have hypermesh 2021 that why you did that.
Thanks for sharing your knowledges.
Have a good day
Harry
If we use two different materials sph materials say Aluminium and steel and they mix together, do we need to create contact between sph particles? If so which type of material?
Correction which type of contact?
Hello Swapnil, I could not get the 4 components after importing the provided geometry in RADIOSS, It is showing 40 different components. Will you please suggest any advice?
Very good
Thank you!
How do you incorporate different energy levels into the impact? Thanks
Bro, Can you do analysis on the tensile specimen by showing Stress-Strain Graph till the fracture point
Thanks for the suggestion. I will work on this topic soon 👍🏻
Thank you sir..i like your video...i had request, can u make a tutorial for FSI case which bullet penetrate the tank filled with fluid? thank you sir
Hello,
Thanks for the suggestion. I will see what I can do about this soon :)
@@Aeroswap thank you sir...
Nice video...👍
Thanks!
can i use the cad model file to import it in another software like solidworks or abaqus?
Sir can you kindly tell me about the theory subject needed to be focused during learning hyperworks
To learn the theory, you can refer any standard FEM textbook available. No need to have a specific book to learn the software.
@@Aeroswap due i need to be perfect in SOM..?
Yes, indeed. The basics are very important and you must have a clear understanding of all the concepts to become a good CAE analyst.
@@Aeroswap thank you for your guidance sir 🙂🙂👍
i cant extract the cad model
Hey Sir
Do you have any reference paper or docs to validate the results
No, this simulation is not based on an actual experiment. The main objective of this video is just to demonstrate the SPH modelling process in Radioss.
got an error while running the simulation
Which version of Radioss are you using? And what is the error message?