Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Computational modelling of lightweight structures
The task of determining appropriate forms for stressed membrane surface structures is considered. The analytical form-finding theories are Finite Element Methods. There are two approaches: the Linear Density Method with links as finite elements and the nonlinear Dynamic Relaxation Method with finite triangles. The general concepts common to all equilibrium modelling systems are presented prior to a more detailed discussion of the Force Density Method. The extension of the Force Density Method to geometrically non-linear elastic analysis is described. A brief overview of the Easy lightweight structure design software system is given with particular emphasis paid to the form-finding and static analysis program modules. Finally, some examples illustrate the flexibility and power of Easy's form-finding tools. The task of generating planar cutting patterns for stressed membrane surface structures is next considered. The practical constraints which influence textile surface structures are presented. Several approaches which have been used in the design of practical structures are outlined. These include the physical paper strip modelling technique, together with geodesic string relaxation and flattening approaches. The Easy design system uses a combined flatten and planar sub-surface regeneration strategy. Examples are given to illustrate the capabilities of Easy 's cutting pattern generation tools. It is shown that, by using a modular approach for the design of membrane structure surfaces, the resulting system is extremely powerful and flexible. The very large number of structures which have been built using the Easy tools (many thousands) prove the validity of this strategy.
Computational modelling of lightweight structures
The task of determining appropriate forms for stressed membrane surface structures is considered. The analytical form-finding theories are Finite Element Methods. There are two approaches: the Linear Density Method with links as finite elements and the nonlinear Dynamic Relaxation Method with finite triangles. The general concepts common to all equilibrium modelling systems are presented prior to a more detailed discussion of the Force Density Method. The extension of the Force Density Method to geometrically non-linear elastic analysis is described. A brief overview of the Easy lightweight structure design software system is given with particular emphasis paid to the form-finding and static analysis program modules. Finally, some examples illustrate the flexibility and power of Easy's form-finding tools. The task of generating planar cutting patterns for stressed membrane surface structures is next considered. The practical constraints which influence textile surface structures are presented. Several approaches which have been used in the design of practical structures are outlined. These include the physical paper strip modelling technique, together with geodesic string relaxation and flattening approaches. The Easy design system uses a combined flatten and planar sub-surface regeneration strategy. Examples are given to illustrate the capabilities of Easy 's cutting pattern generation tools. It is shown that, by using a modular approach for the design of membrane structure surfaces, the resulting system is extremely powerful and flexible. The very large number of structures which have been built using the Easy tools (many thousands) prove the validity of this strategy.
Computational modelling of lightweight structures
Computerunterstützter Entwurf von Membranstrukturen
Ströbel, D. (Autor:in) / Singer, P. (Autor:in)
2002
10 Seiten, 6 Bilder, 10 Quellen
Aufsatz (Konferenz)
Englisch
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