NEiNastran

NEiNastran is a powerful, general purpose finite element analysis tool with an integrated graphical user interface and model Editor which is used to analyze linear and nonlinear stress, dynamics, and heat transfer characteristics of structures and mechanical components.

NEiNastran product suite key benefits

• Comprehensive interactive tools necessary for model creation, analysis monitoring, and results evaluation including a state-of-the-art analysis Editor.
• Uses the world's leading Windows-based pre- and post-processor for advanced engineering finite element analysis (NEiNastran Modeler), which is easy to use and has the power to model very difficult analyses.
• Pre- and post processor integrated with multiple industry-standard structural and thermal solvers, like NEiNastran, MSC.Nastran, NX Nastran, Abaqus, Ansys, LS-Dyna, TMG and Sinda.
• Specialized industry-proven element technologies, including hybrid quad and hex elements, advanced tension-only shell and cable elements, surface and spot weld elements, dissimilar mesh interpolation elements, and heat transfer elements.
• High performance processing including advanced parallel PCG iterative, sparse direct, and block Lanczos solvers which allow solutions to large-scale models over 7 million degrees of freedom on inexpensive 32-bit Windows workstations as well as high end 64-bit Linux clusters.
• Advanced solution sequences such as linear and nonlinear static, transient dynamic, steady state dynamic, frequency extraction, heat transfer, and other analysis types, provide a choice of appropriate analysis types for different types of simulations.
• Robust contact capability, using a 3D surface contact method which easily handles dissimilar meshes between components including frictional effects.
• Extensive composite material support, including, 2D orthotropic, 3D orthotropic, general anisotropic, laminate lay-up definitions, and a wide range of failure criteria.
• Basic through advanced material models, including temperature dependent materials, non-linear elasticity and plasticity effects, creep, and thermo-elasticity.
• Multiple subcase capability, provides a highly efficient technique to evaluate the response of structures to many different load cases and boundary conditions.
• Substructuring and Model Reduction, allows the creation and reuse of substructures to improve the efficiency of large analyses, provides a convenient method to transfer model data to subcontractors, and allows in-depth evaluation of particular regions and convenient transfer of models to subcontractors.
• Load and Boundary Condition Interpolation, allows mapping of thermal and CFD output from specialized heat transfer and fluid dynamic models to the structural model for load and boundary condition definition.
• Submodeling, allowing in-depth evaluation of particular regions.
• Support for standard manufacturing process effects such as casting induced warpage and residual stress and strain.
• Inertia relief capability, allows the quasi-static simulation of forces acting on an unconstrained structure such as aircraft in flight or a submerged submarine.
• Advanced modeling capability, features robust CAD import, advanced beam modeling, mid-surface extraction, hex and tet meshing, and a broad range of loads, materials, analyses types and visualization options.
• Used to model virtually anything including aircraft, satellites, marine vessels, heavy construction equipment, and medical devices by engineering organizations and consultants world-wide.
• Integration with specialized fatigue applications, such as Winlife, which is available as an add-on to the NEiNastran product suite and also fe-safe, nCode, Falancs and FE-Fatigue.
• Proven track record demonstrating that NEiNastran is one of the most trusted products for structural analysis in all industries.

NEiNastran provides analysis capability for the following solution types:

• Linear Static Analysis
  • Linear stress, strain, deflection
  • Inertial relief
  • Thermal stress and deflection
  • Prestress
  • Mass properties
     
• Dynamic Response
  • Direct transient
  • Direct frequency
  • Modal transient response
  • Modal frequency response
  • Random vibration
  • Modal response/shock spectrum generation
  • Modal summation (ABS, SRSS, NRL, CQC, DDAM)
  • Linear and nonlinear direct transient response
  • Linear and nonlinear prestress support for all modal solutions
     
• Nonlinear Static Analysis
  • Large displacement and rotation
  • Material nonlinear (nonlinear elastic, elastic-plastic, perfectly plastic thermo-elastic, visco-elastic, creep)
  • Tension only (cables & shell elements)
  • Contact (gap, slide line, and surface to surface - all with friction)
     
• Steady State Heat Transfer
  • Linear and nonlinear
  • Conduction, convection, and radiation
     
• Normal Modes
  • Natural frequencies and mode shapes
  • Flexible and rigid body motion
  • Modal participation factors, effective mass/weight and reaction forces
  • Linear and nonlinear prestress (stiffening)
     
• Transient Heat Transfer
  • Linear and nonlinear
  • Conduction, convection, and radiation
     
• Buckling Analysis
  • Critical loads and mode shapes
  • Linear and nonlinear initial stress
     
• General (Supported in all solutions)
  • Composite laminate materials
  • Temperature dependent materials
  • Direct matrix import & export (DMIG)
  • Craig-Bamption and Guyan reduction