Karamba3D

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Comment by Silvia Picone on February 16, 2017 at 8:56am

I going to have a look! thank you Marcio Sartorelli! I have added a new discussion for my problem as Clemens suggested! I will write you under my new discussion later

Comment by Márcio Sartorelli on February 15, 2017 at 12:09pm

Hello Silvia,

For deck weight you should model a mesh of it and add a Mesh Load component including the nodes you want to consider (See Karamba manual for details, also in the previous comments I helped ma qingsong with a similar problem).

For wind and wave analysis you should first check for the structure vibration modes (For wind the first frequency should be >1.5Hz, i'm not sure what frequency band you need for waves). Grater stiffness and less mass helps to increase the frequencies. Once you achieved those results you can make a statical analysis considering these loads, again i'm not sure what to do for wave loads, but for wind I normally use the method used in this video: https://www.youtube.com/watch?v=-t3yE1xxMUo (it's a very simplified method, but do it's job).

I can take look on your GH definition tomorrow.

Comment by Karamba3D on February 15, 2017 at 12:06pm

Dear all,

could you please add a new discussion in case of questions? Postings on the comment wall are hard to follow and not easy to find by others.

Best,

Clemens

Comment by Silvia Picone on February 15, 2017 at 10:28am

Hello everyone! 

I'm doing my final project to graduate in engineering. What I'm trying to project is a footbridge that sail along the coast supported with puncheons. I am new in Karamba. When I considerate loads I had problems how to considerate wave, wind loads and the deck weight. how can I simulated all these loads?

bordo%20linea%20strada.3dm

FootbridgeKaramba.gh

Comment by ma qingsong on January 30, 2017 at 7:09pm

Dear Márcio:

You are very friendly. Thank you so much.

I'm sorry about that I did not describe the problem right. My English is bad.

I means the waffle structure and 6mm steel plate are Welded together. They become the overall structure, and I give the strong power to the overall structure to check the displacement. As it is shown in the image, the green plate is the steel plate, the yellow is the waffle structure. The overall structure is the waffle structure and steel plate are Welded together. How to analysis? Could you help me finish the program again?

Thank you very much.

Comment by Márcio Sartorelli on January 30, 2017 at 7:12am

Hello Qisong,

See attached the changes I made. To parametrize the thickness of the plate you just need to multiply its material density with the thickness (going from kN/m³ to kN/m², or just from volume to surface load).

ma20170129.gh

Comment by ma qingsong on January 30, 2017 at 6:45am

Hello Márcio,

Thank you for your answer.

Normally I have done as you said. But it's no relate to the thickness of the steel plate. I want to change the thickness of the steel plate to check the displacement of the waffle structure. I uploaded the part of the program. Could you help me finish the program? Thank you very much.

ma20170129.gh

Comment by ma qingsong on January 30, 2017 at 6:36am

Hello Márcio,

Comment by Márcio Sartorelli on January 30, 2017 at 5:54am

Hello Qinsong,

Do you have the steel plate mesh? If you do so you can use the Mesh Load component, setting the vector force to global in negative Z direction (the amplitude of the vector will be the mesh load (kN/m²).

In the component you can set the points of the mesh witch the load will be accounted, try to insert there only the upper nodes of your waffle structure.

Márcio

Comment by ma qingsong on January 30, 2017 at 5:47am

Hello:

I want to know how to make a program and analysis the structure of shell waffle covered with the steel plate.

I want to create the load for the steel plate(6 mm thickness) to check the displacement of the waffle structure.

I uploaded the schematic diagram and part of the program. Any suggestion? 

Please help me.

Thank you very much

Ma

ma20170129.gh

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