Formfinder Software For Membrane Structure Designing
|IxCube 4-10 formfinder module is able to relax a mesh into a shape with assigned prestress and/or tension. Not only the membrane can be specified but also the supporting steel, wood or concrete framework. The system uses a range of technologies to produce the final result based in a "self stressed" model. Membrane stress state, cable tension, beam bending moments and stiff plates are part of this global equilibrated system.
Look at the video Tutorial - 1 in Modeling to learn more about this feature.
ETFE roof for the Etiopia Council building. Robert Off Designer. Modelled and engineered with ixForten 4000
IxCube 4-10 has a number of Form-finding strategies for this purpose: Linear FDM: Linear Force Density Method controlled by the force density value C. The mesh is relaxed and all links end up with a positive tension proportional to the C value.
Brute Force FDM: The Brute Force FDM solver enables fixed force and fixed length links using a spare matrix solve technology that outperforms hundres of times the speed on the classic Non-Linear FDM solver.
NFDM method : This method uses the Natural Force Density Method developed by Prof. Ruy Marcelo Pauletti from the univerity of Brazil. It is a fast and robust technique able to relax triangle meshes with desired pre-stress very fast and a perfect tool for ETFE cushions other other classic membrane shapes.URM Solver: The Update Reference Strategy is a technique developed by prof. Bletzinger and enables direct form-finding over triangle and quad meshes. IsoTropic or Anisotropic membrane stress state can be specified and so natural minimal surfaces are easily shaped with this technology.
Look at the video Tutorial - 5 in Modeling to learn more about this feature.
2200 square meter tensile structure designed and engineered by Gerry D'Anza. Patterning and production by Loredana Di Benedetto
ixCube 4-10 : Example of Form-Finding a membrane using the Natural Force Density Method