Building models in NDN is fast and easy. NDN has automatic mesh generation for any shape or configuration and many convenient functions for manipulating in 3D. You can also import and export DXF files.
Control Panel Menus include: Edit, Build, Adjust, Tools, Query, Utilities, Layer
Properties are defined three ways;
All element types are active during form finding: Members, Cables, Beams, Geodesics, etc.
By combining different element types and form finding methods any type of shape can be found. With NDN the user is in control and is never constrained to one type of solution.
The loading environment is used to apply wind, snow, and other external loads to a structure. Wind and snow load coefficients are generated automatically based on building codes, wind direction, and the geometry of the structure. There is also a feature for applying realistic wind load to permeable open weave shade cloth fabric. With this feature the wind load coefficients will adjust automatically during analysis as the fabric deflects.
Applied Wind Load - Tensile Membrane
Applied Dead Load (Nodal Load) - Tensile Membrane Military Shelter
The analysis environment is used to perform large deflection finite element method analysis. The stiffness method is used combining both the material and geometric stiffness matrices. Fabric is modeled with true membrane elements that have proper orthotropic material properties. The matrix solver has been tested by NASA and determined to be the fastest solver in existence, thus providing fast convergence.
- Allows you to display and study analysis results.
- Performs automatic member sizing to US, Euro, British, and Australian codes.
- Checks rigid member connections.
- Generates outputs and calculates reports.
The patterning environment is used to create output patterns. Patterns can be generated automatically based on the fabric width or based on the desired number of patterns in an assembly. Alternatively, the user can define their specified seam arrangement. The patterns can be flattened either by geometrical unfolding, or for increased accuracy thru a minimum energy finite element approach.