OptiStruct is a proven, modern structural solver with comprehensive, accurate and scalable solutions for linear and nonlinear
analyses across statics and dynamics, vibrations, acoustics, fatigue, heat transfer, and multiphysics disciplines.
Elements are a fundamental part of any finite element analysis, since they completely represent (to an acceptable
approximation), the geometry and variation in displacement based on the deformation of the structure.
The different material types provided by OptiStruct are: isotropic, orthotropic, and anisotropic materials. The material property definition cards are used to
define the properties for each of the materials used in a structural model.
High Performance Computing leverages computing power, in standalone or cluster form, with highly efficient software,
message passing interfaces, memory handling capabilities to allow solutions to improve scalability and minimize run
times.
Contact is an integral aspect of the analysis and optimization techniques that is utilized to understand, model, predict,
and optimize the behavior of physical structures and processes.
OptiStruct and AcuSolve are fully-integrated to perform a Direct Coupled Fluid-Structure Interaction (DC-FSI) Analysis based on a
partitioned staggered approach.
Aeroelastic Analysis is the study of the deflection of flexible aircraft structures under aerodynamic loads, wherein
the deformation of aircraft structures in turn affect the airflow.
OptiStruct provides industry-leading capabilities and solutions for Powertrain applications. This section aims to highlight OptiStruct features for various applications in the Powertrain industry. Each section consists of a short introduction, followed
by the typical Objectives in the field for the corresponding analysis type.
This section provides an overview of the capabilities of OptiStruct for the electronics industry. Example problems pertaining to the electronics industry are covered and common solution
sequences (analysis techniques) are demonstrated.
OptiStruct generates output depending on various default settings and options. Additionally,
the output variables are available in a variety of output
formats, ranging from ASCII (for example, PCH) to binary files (for example,
H3D).
A semi-automated design interpretation software, facilitating the recovery of a modified geometry resulting from a
structural optimization, for further use in the design process and FEA reanalysis.
The OptiStruct Example Guide is a collection of solved examples for various solution sequences and optimization types and provides
you with examples of the real-world applications and capabilities of OptiStruct.
Fittings involving aircraft panels, the bulkhead, angle, tee, skin and lateral panels
are meshed using quadrilateral elements. The fittings are meshed using tetrahedral
elements. The fasteners are defined using RBE2 and
CBUSH elements. Figure 1. DFEM Model
The above fitting is analyzed for tensile and compressive loads, in two different
load steps.
The details of loading and the boundary conditions for the model are: Figure 2. Details of Loads and Boundary Conditions
The analysis is performed with different analysis types.
Model Files
Before you begin, copy the file(s) used in this example to
your working directory.
The element forces for the CBUSH elements are then reviewed in the
Tension and Compression cases. Figure 3. DFEM Model Results from Linear Static Analysis
Nonlinear Analysis with Pre-loaded Fasteners
Nonlinear material property is defined using TABLED1 for aluminum
and a pre-tension of 6000 lbs. is applied to the fasteners using the
DEFORM card. Figure 4. DFEM Model Results from Nonlinear Static Analysis. (a) before applying an external load; (b) after the application of
external load
Large Displacement Nonlinear Analysis with Pre-loaded Fasteners
Large displacement nonlinear analysis can be activated with PARAM,
LGDISP in OptiStruct. Figure 5 shows the results from a Nonlinear Large
Displacement Analysis. Figure 5. DFEM Model Results from Nonlinear Large Displacement Static
Analysis