# Structural Analysis

The Structural Analysis section provides an overview of the following analyses.

The Structural Analysis section provides an overview of the following analyses.

**Linear Static Analysis**

**Linear Buckling Analysis**

The problem of linear buckling in finite element analysis is solved by first applying a reference level of loading, ${f}_{ref}$ , to the structure.**Nonlinear Static Analysis**

This solution sequence performs static nonlinear analysis. Static inherently implies that a process occurring in real-time is being simulated infinitely slowly.**Explicit Dynamic Analysis**

This newly developed OptiStruct Explicit solution type (ANALSIS=`NLEXPL`) has been developed solely in OptiStruct, in the same way as the OptiStruct implicit solution. The input data (elements, material, property, loading, etc…) for explicit solution is the same as implicit solution and the output data structure is also the same as implicit solution.**Normal Modes Analysis**

Normal Modes Analysis, also called eigenvalue analysis or eigenvalue extraction, is a technique used to calculate the vibration shapes and associated frequencies that a structure will exhibit.**Frequency Response Analysis**

Calculates the response of a structure to steady-state oscillatory excitation.**Complex Eigenvalue Analysis**

Real eigenvalue analysis is used to compute the normal modes of a structure. Complex eigenvalue analysis computes the complex modes of the structure.**Random Response Analysis**

Used when a structure is subjected to a non-deterministic, continuous excitation.**Response Spectrum Analysis**

Response Spectrum Analysis (RSA) is a technique used to estimate the maximum response of a structure for a transient event. Maximum displacement, stresses, and/or forces may be determined in this manner.**Linear Transient Analysis**

Calculates the response of a structure to time-dependent loads. Typical applications are structures subject to earthquakes, wind, explosions, or a vehicle going through a pothole.**Nonlinear Transient Analysis**

Nonlinear Small Displacement Transient and Nonlinear Large Displacement Transient (LGDISP) Analyses are currently available to solve nonlinear problems which include transient effects.**Explicit Dynamic Analysis (Radioss Integration)**

Explicit Dynamic Analysis in OptiStruct is provided through an integration of the Radioss Starter and Radioss Engine via a translator. Explicit integration schemes, are available via Radioss Integration.