SimAcademy Webinar Archive: Adaptive Time Stepping Procedure in Implicit Nonlinear Analysis
Load (time) stepping procedure is important in nonlinear analysis. The NLSTEP bulk data provides a unified load stepping scheme that replaces existing options entries such as NLPARM, TSTEPNL, NLPCI, and NLADAPT. This option can be used for statics and dynamics, fixed and adaptive load stepping, definition of convergence criteria and other options for mechanical, thermal and coupled analysis. In MSC Nastran 2012, NLSTEP option is extended with a new keyword that automatically sets up the entries for the time stepping adjustment and convergence tolerance. This makes it possible to use smart default based on users’ judgment of the nonlinearity of the model to be analyzed.
SimAcademy Webinar Archive: Introduction and Overview of MSC Nastran Embedded Fatigue
Fatigue life analysis of mechanical systems has historically been performed as a post processing operation, gathering and entering the three fundamental inputs of finite element stresses, load time histories and fatigue material properties (S-N curves) into a separate and distinct fatigue solver. MSC Nastran 2013 introduces a fundamental paradigm shift in this logic through a direct integration of fatigue life solutions into the finite element solver. This new technology is entitled Nastran Embedded Fatigue, or NEF for short.
SimAcademy Webinar Archive: Failure Analysis of Composite Structures
MSC Nastran and Marc provide composite failure technology to evaluate the ultimate capacity of composite structures by progressively failing the plies and to simulate composite delamination, debonding and crack propagation. This presentation briefly review existing methods for composite failure analysis such as progressive failure analysis, delamination based on stress criterion and cohesive interface, and VCCT crack propagation by means of splitting element, global remeshing and breaking glued contact, followed by more detailed discussion and demo of new failure analysis features.
SimAcademy Webinar Archive: Academic - Getting Started Building Models in Adams/View
Adams/View is a very capable pre- and post-processor for the underlying Adams/Solver simulation engine. New Adams users need to be familiar with the building blocks used to create an Adams model, the Adams nomenclature and the layout/philosophy of Adams/View.
SimAcademy Webinar Archive: Academic - Flutter Analysis Using MSC Nastran
MSC Nastran provides a flutter analysis solution as one part of the aeroelastic analysis capability based on unsteady subsonic and supersonic flow. The unsteady aerodynamic methods are small perturbation methods for flat plates. The flutter analysis solution is used to determine the aeroelastic stability of a fixed wing aircraft. The flutter summary results provide damping and frequency values versus velocity listed in the standard (f06) output and/or plotted with the venerable XYPLOT requests. Complex eigenvector (flutter mode shape) results may be plotted with Patran or FLDS.
SimAcademy Webinar Archive: Adams - Working with Adams/Car Templates
Adams/Car allows the user to create assemblies of suspensions and full vehicles, and then analyze them to understand their performance and behavior. The underlying technology uses templates to describe common subsystems in the vehicle. This session of SimAcademy is meant for new Adams/Car users. The basics of Adams/car will be reviewed with an overview of assemblies, subsystems and templates. This will be followed by a demonstration of how to create an example template which contains a REQUEST that operates across different templates.
SimAcademy Webinar Archive: Patran’s Utilities Menu
With dozens of tools covering everything from geometry to postprocessing, the Utilities menu in Patran has a wealth of functionality that is often overlooked. This presentation will highlight some of the most useful tools with a view to helping you to get the most out of Patran.
SimAcademy Webinar Archive: MSC Nastran Multi-Physics Simulations
Topics for this session include: What are the new multi-physics features in MSC NASTRAN 2010? How do we use these features? What is the required users’ input?
SimAcademy Webinar Archive: An Introduction to Buckling Analysis Using MSC Nastran and Patran
Buckling is a critical state of stress and deformation, at which a slight disturbance causes a gross additional deformation, or perhaps a total structural failure of the part. Structural behavior of the part near or beyond 'buckling' is not evident from the normal static Analysis. Therefore, a Buckling analysis is required. Also, From an FE analysis point of view, a buckling analysis is used to find the lowest multiplication factor for the load that will cause a structure to buckle. The purpose of such an analysis is to calculate the buckling load factor and buckled shape of the structure.. This webinar will introduce various methods of performing Buckling Analysis in MSC Nastran and Patran.
SimAcademy Webinar Archive: FRF, FBA, and TPA Capability in MSC Nastran 2010
The frequency response function (FRF) and FRF-based assembly (FBA) are new capabilities in MSC Nastran. FRFs can be used to represent components. This capability facilitates the computation of the FRFs of individual components and also the subsequent computation of the FRFs of an assembly of such components from their individual FRFs. It supports test FRF components in the FBA process. Also it allows the FBA process to handle a single FRF component without any connection data. Such an FRF-based assembly process represents an alternative to component mode synthesis (or Modal Substructuring). This method also lends itself to tracking load paths or energy flows through a structure. This approach may be regarded as an alternative to mode participation studies. This latter feature, commonly referred as transfer path analysis (TPA). Note that this session is NOT a substitute for formal training.
SimAcademy Webinar Archive: FSI Simulation Using MSC Nastran – SOL 700
MD Nastran supports two methods of Fluid Structure Interactions: Open FSI by coupling with Third Party CFD solution Explicit Solution using SOL 700 This presentation will cover FSI simulation using explicit solution (SOL 700) which couples the structural solver from LS-Dyna and fluid Solver in Dytran. The objective of fluid-structure interaction using the coupling algorithm is to enable the material modeled in fluid and Structural meshes to interact. The coupling algorithm computes the interaction between the two sets of elements enabling complex simulations such as Bird Strike, Sloshing, Blast and Airbag analysis.
SimAcademy Webinar Archive: Restart in Static, Dynamic, and Non-Linear Analysis Using MSC Nastran
A restart is a logical way of continuing from a previous run without having to start from the beginning. The savings can be in terms of both time and money. You use some forms of restarts practically every day in your life--perhaps without realizing it. An example of a restart can be as simple as reading a book. Each time that you continue from where you left off is a restart. This analogy can be applied to MSC Nastran. This discussion of restarts is divided into the following sections: Types of restarts Structure of the MSC Nastran input file User Interface for a restart. Restart in Static analysis Restart in Dynamic analysis Restart in Non-linear analysis
SimAcademy Webinar Archive: A Review of Splining for Aero-Structure Coupling in Aeroelastic Solutions
All aeroelastic solutions require that the structural DOFs and aerodynamic DOFs are coupled so that loads and displacements are transferred between the meshes while preserving equilibrium. In this presentation, we will: Review the various spline types and methods available in MSC/MD Nastran Explain the algorithms and show how splines work. Provide usage guidelines and show some techniques for validating splines using examples and demonstrations.
SimAcademy Webinar Archive: Marc Global-Local Analysis
Local variations, such as geometry changes and mesh refinement, usually need a complete re-analysis of the model. If the changes have a negligible influence on the solution sufficiently far away from the changed region, only a local part can be analyzed using a global-local analysis, which is also called structural zooming. Marc structural zooming capability automates the global-local analysis to achieve a better resolution in local area where stress gradient is high or mesh has to be changed from shell to solid. In the Marc 2010 version, the global-local analysis has been expanded to allow global remeshing.
SimAcademy Webinar Archive: Adams - Vibration Analysis of Full Dynamic Systems
The study of vibration problems of full dynamic systems can be accomplished in different ways. MSC/MD_ADAMS Vibration is one of them; a system is linearized at a selected operating point and a forced vibration analysis is executed to determine the frequency content of the full system and the main vibration modes that are prevalent on the vibration problem being studied.