3 Replies Latest reply on May 24, 2013 6:02 AM by Barry R

Maths to solve a Howe Truss structure

I used solidworks simulation software to solve this problem. I was wondering does anyone know what maths/formulas that could be used to solve this

The aim is to reduce the material costs associated with fabricating a Howe Truss structure (see attached image ) using Aluminium, which could withstand the given applied forces with a maximum displacement of 3mm. The yield strength of the aluminium is 27.57 N/mm^2.

The goal is to find the smallest cross sectional area that can support the forces.

I know it’s a long shot, but if anyone could point me in the right direction, in finding the correct equations to use it would be a great help.

Thanks

• Re: Maths to solve a Howe Truss structure

Your question is not trivial.  You'll study that sort of thing for weeks in your second year of engineering school.

• Re: Maths to solve a Howe Truss structure

Barry,

I like you instict to check the FEA solution with hand calcs. I've attached a link to how to solve simple truss problems. You'll need Matlab, Mathematica or something similar to use this method on a truss problem that large, since it will involve a matrix. Alternately, google the method of sections, which allows you to get the data you need without solving the whole problem. It's pretty straightforward--if you have the math bakground.

http://www.vcity.ou.edu/demoModules/analysis/truss/truss.htm

Ignore the attached file. I don't know how to delete it.

• Re: Maths to solve a Howe Truss structure

Thats great Mike, youve been a great help thanks. Im going to look into the Method of Sections.