Elastic Analysis

LARSA 4D includes all of the standard elastic analysis types found in finite element structural analysis software.

Standard Analysis Types

Linear Elastic Static

Linear/Nonlinear Time History

Response Spectrum Analysis

Eigenvalue/Stressed Eigenvalue

Moving Load (Marched Pattern)

Nonlinear Static with Geometric and Material Nonlinearity

Solver Types

The following solver types are available for all analyses:

Intel LAPACK Solver: Used for small-to-medium sized models and for checking instability, optimized for Intel CPUs.

Intel Parallel Sparse Solver: An advanced sparse solver by Intel which takes advantage of multi-core/multi-CPU computers and is designed for large models.

Elastic Element Library

Beam and Truss

Cable with rebirth

Thin or Thick Plate Behavior

Quadratic or Bilinear Membrane Behavior

Drilling Degrees of Freedom

Grounded Spring (translational/rotational)

2-Node Spring (translational/rotational)

Coupled 6x6 Foundation Spring

Hook and Gap Element

8-Node Brick Element

Load Types

Joint loads in global or user-coordinate-system directions.

Beam Loads: point, trapezoidal, uniform, partial, and distributed, in local, global, and projected directions.

Point and uniform loads on plate/shell and brick elements

Automatic self-weight for all elements.

Thermal loading for all elements.

Pre-stressing for cable, truss, and beam.

Post-tensioning cable elements with option to lock the cable tension.

Other Features

User coordinate systems can be rectangular, cylindrical, spherical.

Displacement coordinate systems for joints using user coordinate systems.

Supports, springs, and loads specified in global or user coordinate systems.

Member rigid end zones, semi-rigid connections, end-offsets.

Slaved degrees of freedom

Nonprismatic tapered sections.

Member reference axis and centroid offsets allow nonprismatic sections to be placed in a model easily.