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Analysis with NEi Nastran

A nonlinear transient response analysis was used to perform a nonlinear event simulation of this piston, connecting rod, and crankshaft assembly. [More Animations]

NEi Nastran provides analysis capabilities for the following solution types:

Linear Static Analysis

• Linear stress, strain, deflection
• Inertial relief
• Thermal stress and deflection
• Prestress
• Mass properties
• Multiaxial

Dynamic Response

• Direct transient response
• Direct frequency response
• 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
• Vibration fatigue

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)
• Virtual fluid mass

Transient Heat Transfer

• Linear and nonlinear
• Conduction, convection, and radiation

Steady State Heat Transfer

• Linear and nonlinear
• Conduction, convection, and radiation

Buckling Analysis

• Critical loads and mode shapes
• Linear and nonlinear initial stress

Nonlinear Analysis

• Nonlinear static and transient response
• Large displacement and rotation
• Automated Impact Analysis (AIA™)
• Material nonlinear (nonlinear elastic, elastic-plastic, perfectly plastic thermo-elastic, visco-elastic, creep)
• Tension only (cables and shell elements)
• Contact (gap, slide line, and surface to-surface, all with friction)
• Progressive Ply Failure Analysis (PPFA™)
• Brittle materials (concrete)
• Shape memory materials (Nitinol)

General (supported in all solutions)

• Composite laminate materials
• Temperature dependent materials
• Direct matrix import and export (DMIG)
• Craig-Bamption and Guyan reduction
• Superelement support
• Displacement, load, and temperature interpolation

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