Rudder - FEA analysis

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A2022
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Rudder - FEA analysis

Post by A2022 »

I have not done much large sheet metal FEA analysis before, but I thought I would give it a try. say hello to shell and cbush elements, :). the goal is to improve my FEA skills and to complete some parametric studies for natural frequency response and weight sensitivity. I'll start with the RV6 rudder (since I have it) and then move to the RV9 rudder. this is planned to be a long Winter project. I will say it is really nice to be able to go back and look at "RB's" original hand drawings of the RV6 rudder. this one is for .016 thick skins.

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Steve Melton
RV9A, Superior O-320 (roller cams), WW 200RV prop, Dual impulse slick mags, CHT 330F, EGT 1300F, Oil pressure = 65 psi, B and C Alt, 1000+ hours
Freedom and Democracy are all that really matter.
https://www.rvplasticparts.com/

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Re: Rudder - FEA analysis

Post by A2022 »

deleting the rivets holes for natural frequency modeling. I've settled on the approach for this analysis. now to execute it.

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Steve Melton
RV9A, Superior O-320 (roller cams), WW 200RV prop, Dual impulse slick mags, CHT 330F, EGT 1300F, Oil pressure = 65 psi, B and C Alt, 1000+ hours
Freedom and Democracy are all that really matter.
https://www.rvplasticparts.com/

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Re: Rudder - FEA analysis

Post by A2022 »

I try to do something with this each day. all rivet holes have been blanked. I am running some FEA vibration test panels to understand how best to fasten these sheet metal components in the model. I don't have the CBUSH element available, so I am testing coupled nodes, beams and springs to simulate the rivets. it's about rivet DOF! I am working to get Hypermesh/Hyperworks to hopefully speed the placing rivets. that may or may not work out. this is a learning exercise for me. sheet metal and rivets, learning to efficiently build a model and have accurate results. all fun stuff!




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Steve Melton
RV9A, Superior O-320 (roller cams), WW 200RV prop, Dual impulse slick mags, CHT 330F, EGT 1300F, Oil pressure = 65 psi, B and C Alt, 1000+ hours
Freedom and Democracy are all that really matter.
https://www.rvplasticparts.com/

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A2022
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Posts: 440
Joined: Sat Mar 05, 2022 8:52 am
Location: Cincinnati, OH
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Re: Rudder - FEA analysis

Post by A2022 »

that took a while, but finally into Hypermesh. moving slowly on this and will need to make some analysis verification models firstly. this is the RV6 rudder, but I might as well begin the RV9 rudder solid model to have it ready for analysis.


Image
Steve Melton
RV9A, Superior O-320 (roller cams), WW 200RV prop, Dual impulse slick mags, CHT 330F, EGT 1300F, Oil pressure = 65 psi, B and C Alt, 1000+ hours
Freedom and Democracy are all that really matter.
https://www.rvplasticparts.com/

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A2022
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Posts: 440
Joined: Sat Mar 05, 2022 8:52 am
Location: Cincinnati, OH
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Re: Rudder - FEA analysis

Post by A2022 »

grinding thru my hypermesh training. I think this program will be powerful for 2D meshing sheet metal, especially the batch mode. it will take me a while to complete this training, but I am working on it. how does this one look? :)

Tinlicker & Ben Böhmer - Voodoo, great song for riding a mountain bike trail thru a forest!
https://youtu.be/0leLZgSxj2I


Image
Steve Melton
RV9A, Superior O-320 (roller cams), WW 200RV prop, Dual impulse slick mags, CHT 330F, EGT 1300F, Oil pressure = 65 psi, B and C Alt, 1000+ hours
Freedom and Democracy are all that really matter.
https://www.rvplasticparts.com/

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A2022
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Posts: 440
Joined: Sat Mar 05, 2022 8:52 am
Location: Cincinnati, OH
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Re: Rudder - FEA analysis

Post by A2022 »

RV6 rudder - working geo cleanup in hypermesh. painful for my old mind to learn another program. these are mid-surfaces, generated in hyperworks from the imported solid model.


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Steve Melton
RV9A, Superior O-320 (roller cams), WW 200RV prop, Dual impulse slick mags, CHT 330F, EGT 1300F, Oil pressure = 65 psi, B and C Alt, 1000+ hours
Freedom and Democracy are all that really matter.
https://www.rvplasticparts.com/

User avatar
A2022
Class D
Posts: 440
Joined: Sat Mar 05, 2022 8:52 am
Location: Cincinnati, OH
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Re: Rudder - FEA analysis

Post by A2022 »

stumbling my way through this but finding a few tricks. it will take me a while to fully grasp hypermesh. CBush elements are available with the Opti solver (Nastran based), and that is what I was truly after. rivets will be represented by RBE3-CBUSH-RBE3. if I am going to do this, I want a quality analysis.

Eli & Fur - You're So High
https://youtu.be/3GEqdbh8sFI

Image
Steve Melton
RV9A, Superior O-320 (roller cams), WW 200RV prop, Dual impulse slick mags, CHT 330F, EGT 1300F, Oil pressure = 65 psi, B and C Alt, 1000+ hours
Freedom and Democracy are all that really matter.
https://www.rvplasticparts.com/

User avatar
A2022
Class D
Posts: 440
Joined: Sat Mar 05, 2022 8:52 am
Location: Cincinnati, OH
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Re: Rudder - FEA analysis

Post by A2022 »

still stumbling my way through. a section cut.

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Image
Steve Melton
RV9A, Superior O-320 (roller cams), WW 200RV prop, Dual impulse slick mags, CHT 330F, EGT 1300F, Oil pressure = 65 psi, B and C Alt, 1000+ hours
Freedom and Democracy are all that really matter.
https://www.rvplasticparts.com/

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