LS-DYNA Data Management using Visual-Environment (original) (raw)
Related papers
2015
Realistic Simulation is considered to be the most important part of Simulation Based Design (SBD) in the product development cycle. Realistic simulations can not be achieved just by using currently available CAE pre and post processing functionalities alone. Many of the complex requirements of CAE modeling need to be addressed by having a synchronized CAD and CAE environment. CAE analysts need a tool, which will allow them to control variables, manage data, adapt the changes, and transport across different disciplines of analysis such as Crash, Safety, NVH and Durability. ESI’s Open VTOS ™ application called “Visual-Environment (VE) ” provides such capabilities as a complete solution to SBD. VE is an integrated suite of pre-post, CAE data management tools synchronizing CAD and CAE. It also provides several contexts based on individual FE solvers. Visual-Crash DYNA (VCD) is for LS-DYNA model setup, Visual-Composer (VCO) is for model assembling and data management by linking CAD (Geom...
Visual-Environment Integrated Pre and Post Environment for LS_DYNA
2008
Visual-Environment (VE) is an open collaborative engineering environment framework or platform called as Open VTOS (Virtual Try-Out Space). VE is an integrated suite of solutions, which has different contexts seamlessly linked for Crash and Safety, Durability, NVH and others. The applications of interest for supporting LS-DYNA based processes are: Visual-Crash DYNA (VCD)-a pre processor for LS-DYNA, Visual-SAFE-an advanced pre-processor for safety features, Visual-Mesh a general purpose mesher, Visual-Viewer (VVI)-a general purpose plotting and simulation application, Visual, Visual-Process Executive-an application for CAE process customization and repetitive tasks automation. These are some of the contexts available in VE but focused to support LS-DYNA. Globalization, new regulations and changes in technologies are influencing the simulation life cycle. These changes are driving the pre and post processing environments for remarkable improvement in productivity, usability and innov...
VisualDSS CAE Data Management and Decision Support System for Simulation Life Cycle Management
Simulation industry has matured enough to carry out the design iterations using just the simulation results without relying on expensive prototype testing. Such simulation approaches have drastically reduced the product development lead time, cost and product failures. Engineers and managers spend most of their time on non engineering activities searching for information, learning simulation tools and workflows, hackneyed repetitive simulations, manual communication and manual simulation data management. The integrated simulation management system such as VisualDSS® (Visual Decision Support System) helps to outwit the current performances of simulation by addressing such non engineering areas of simulation. VisualDSS is a simulation lifecycle management system from ESI's Visual-Environment suite which aims at providing end-to-end decision support for the simulations such as LS-DYNA® by providing integrated multi disciplinary simulation management features such as simulation dat...
The increasingly demanding and complex requirements in Crash Analysis, call for continuous and innovative software development. BETA CAE Systems in an effort to meet and exceed the requirements of the industry is introducing new technologies, both in the pre-processing area with ANSA, and in post-processing with µETA. This paper presents these new technologies. BETA CAE Systems goal has always been to provide fast and automated tools that allow the users to be efficient, and to easily manage their CAE models. Tools like the Batch Mesher, Data Management and Task Manager have provided solutions for the seamless workflow from CAD to Analysis. Recently, taking into account the needs and practices followed by most of the CAE users, a new tool has been introduced, designed for handling and controlling loadcase build-up with includes. This includes Configuration Manager in addition to simplifying the handling of includes configurations, it also keeps track of the different includes versions, with the assistance of the ANSA Data Manager, thus providing a unique advantage. In the field of Safety the rapid development work continuous. The need for better and more accurate behavior of Seatbelts has resulted in increased complexity of the Solver's (LS-DYNA) seatbelt technologies. BETA has responded quickly to meet the new 2D Seatbelt requirements by advancing and automating the existing seatbelt tool. Increased automation has also been achieved in the areas of Seat-Dummy positioning, and Pedestrian and Interior Safety analysis setup tools. In theses areas there is a need to provide the users with the ability to explore the validity of their models by performing Robustness and Sensitivity analysis. This area is currently heavily researched in order to provide easy to use tools for the engineers. New Functionality in the field of results transferring across simulations is being introduced. The build-up of a full crash model can be enriched by the results of stamping analysis, allowing for the consideration of local thickness changes and local hardening. The various aspects of streamlining the mapping process and handling the stamp data are addressed. Integral parts of the process are the transparent positioning of the parts from the stamp to the crash design space, the seamless application of the results and the model's automatic update upon changes. Post-processing capabilities of META have also been complemented by significant developments. The support of FEMZIP files stemming from the latest FEMZIP version is added and the reading
2010
This paper presents an innovative integrated process to perform occupant safety simulation with LS-Dyna & Madymo coupling. More than ever before, the automotive industry operates in a highly competitive environment. Manufacturers must deal with competitive pressure and with conflicting demands from customers and regulatory bodies regarding the vehicle functional performance, which forces them to develop products of increasing quality in even shorter time. To address these challenges and deliver optimal collaboration between design and engineering, the integration between CAD and CAE is key. Through a strong link between CAD and CAE, along with the integration of all simulation steps in one environment, new methodologies are developed, allowing the full utilization of parametric geometry based analysis, enabling quick “what if” scenarios simulation, and thus front-loading design with simulation. Complex CAD based assembly is fully automated, reducing the risk of modeling mistakes. Mo...
Best Practices for Crash Modeling and Simulation
US Army Research Laboratory, Vehicle …, 2002
Aviation safety can be greatly enhanced through application of computer simulations of crash impact. Unlike automotive impact testing, which is now a routine part of the development process, crash testing of even small aircraft is infrequently performed due to the high cost of the aircraft and the myriad of impact conditions that must be considered. Crash simulations are currently used as an aid in designing, testing, and certifying aircraft components such as seats to dynamic impact criteria. Ultimately, the goal is to utilize full-scale crash simulations of the entire aircraft for design evaluation and certification. The objective of this publication is to describe "best practices" for modeling aircraft impact using explicit nonlinear dynamic finite element codes such as LS-DYNA, DYNA3D, and MSC.Dytran. Although "best practices" is somewhat relative, the authors' intent is to help others to avoid some of the common pitfalls in impact modeling that are not generally documented. In addition, a discussion of experimental data analysis, digital filtering, and test-analysis correlation is provided. Finally, some examples of aircraft crash simulations are described in four appendices following the main report.
An Environment for Design, Simulation and Interactive Visualization for CAD Models in Modelica
The complexity of mechanical and multi-domain simulation models is rapidly increasing. Therefore new methods and standards are needed for model design. A new language, Modelica, has been proposed by an international design committee as a standard, object-oriented, equation-based language suitable for description of the dynamics of systems containing mechanical, electrical, chemical and other types of components. However, it is complicated to describe the system models in textual form whereas CAD systems are convenient tools for this purpose. We have designed an environment that supports the translation from CAD models to standard Modelica notation. This notation is then used for simulation and visualization. Assembly information is extracted from the CAD models, from which a Modelica model is generated. By solving equations expressed in Modelica, the system is simulated. A 3D visualization tool based on OpenGL visualizes ex
2016
A key issue of the assessment of the Model Based Systems Engineering (MBSE) is the integration between the requirement, functional and physical analyses. It turns out into a full capability of correlation and data exchange among the tools currently available to manage those three activities and, in particular, into a tight cooperation between the functional modeling and the physical one, being based on several methods of engineering, widely applied since longtime (mathematical, analytical, numerical and experimental). A successful accomplishment of this task within the frame of the development of the MBSE represents a milestone for both the methodology and the tools of the Systems Engineering.
Virtual environments for engineering applications
Virtual Reality, 1998
Abstrac[: Virtual reality (VR), provides the user with an ego-centred human-computer interaction environment by presenting the data as a computer-generated 3D virtual environment. This enables the user to be immersed in this world via user position tracking devices and to interact with the data objects in the world in intuitive ways. This paper describes a selection of VR simulations for engineering applications implemented in CLRC which demonstrate the potential of VR interaction techniques to offer quicker and possibly better understanding of spatial relationships and temporal patterns inherent in large data sets. T~vo of the case studies have been implemented to support engineers communicate and review their designs with scientists, managers and manufacturers and to plan their assembly and maintenance work in hazardous physical environments. The other two applications are visualisation case studies based on data sets generated by computational engineering simulations. The case studies are 'real world' applications, involving end-users of large or complex data sets. Insight gained into the user interaction requirements through the implementation and user comments is guiding ongoing research and development activity and this is discussed briefly.