NISA/OPT

• Optimization of structural shapes fully based on initial finite element model, thus no need to model boundary by parametric curve
• Minimization of mass, volume or material cost
• Constraints include: stress and displacement under multiple load cases and stiffness at nodes
• Any symmetry condition can be fully exploited in modeling
• Driving of the solution towards global optimum
• Entire shape of prescribed regions may be subjected to design variation
• The program may form and expand new holes and cutouts within the system
• DSC contour plots

Shape Optimisation of a Solid Cantilever Structure

Minimization of material volume, mass, and weight for fixed geometry by changing thickness of shell, layer orientation angles and thickness of composite laminate and cross-sectional dimensions of Beams/Bars. Capabilities include:

• Optimum design for multiple load cases and associated boundary conditions
• Various optimization algorithms and design sensitivity analysis methods
• Standard cross sections as well as generalized beam section
• Design sensitivity coefficient (DSC) vs. design variable number
• Constraints include: displacement; normal, shear, principal, von Mises, octahedral, node and Gauss point stresses, AISC code; failure criteria; buckling load factor; natural frequency; amplitude under harmonic excitation
• Virtually no limits on the number of design variables and constraints

• Beam cross section optimization of any prescribed general shape, including single or multiple connected cells
• Design variables can be thickness and side length
• Constraints can be imposed on section properties and on requirements from design code and other considerations.