CAEfatigue VIBRATION by CAEfatigue Ltd.

Frequency Domain Random Response and Fatigue Solver

Frequency Domain: Industry Trends and New Technology

Frequency domain methods for fatigue analysis and/or general random response analysis have experienced a resurgence over the last few years due to improved technology and better computational processes. Today, a complete range of models can be processed from full vehicle systems to local component systems. With this resurgence, Software Developers have taken the challenge to broaden the scope even further of what can be done in the frequency domain. This webinar will discuss the current state of the art and the New Technology trends that are currently being realized by the work of CAEfatigue Limited. The webinar will briefly discuss the current state of the art for doing frequency domain random response and fatigue analysis. This will be followed by an overview of new technology coming to the market including advanced random response, collision detection, loads cascading, surrogate loading and vector loading assessment.

Webinars

Frequency Domain Fatigue Damage Calculation Process: Is it Really that Different?

This guest contribution on the Altair Blog is written by the CAEfatigue Team, a member of the Altair Partner Alliance.

Articles

Sine Sweep on Random PSD: The need for frequency matching between the Solver FRF and the Sine Sweep

This guest contribution on the Altair Blog is written by the CAEfatigue Team, a member of the Altair Partner Alliance.

Articles

Frequency Domain Fatigue Analysis with CAEfatigue

This guest contribution to the Altair Blog is written by the CAEfatigue Team, a member of the Altair Partner Alliance.

Articles, Product Collateral

Beginners guide to doing (1) Base Shake analysis and (2) Multi-input analysis within the Frequency Domain

Frequency domain methods for fatigue analysis and/or for general random response analysis have experienced a resurgence over the last few years due to improved technology and better computational processes. Today, a complete range of models can be processed from full vehicle systems to local component systems. Single input BASE shake loads and multiple correlated input loads can now be easily processed by the User. These loading conditions can also contain random PSDs and/or deterministic components like a sine sweep. Different kinds of fatigue life calculations can be done including both Stress-Life and Strain-Life approaches.

Webinars

Introduction to CAEfatigue Vibration 2019

An introduction to CAEfatigue Vibration (CFV) Version 2019 release.

Training Materials

CAEfatigue GUI (CFG)

Results generated by the CAEfatigue Software Suite can be visualized in commercial post-processing packages such as HyperView, however, we want to provide a simple, easy to use graphical user interface that can be operated without significant training, yet provides all the necessary visual information that is required by the user.

Brochures, Technical Papers

CAEfatigue Time2PSD

We want to provide a tool that engineers or designers can use too easily and accurately convert multiple time signals to PSDs included in the effects of cross channel phasing.

Brochures, Technical Papers

CAEfatigue VIBRATION - BASE SHAKE and CAEFatigue VIBRATION - MULTI

CF_BASE (single input) and CF_MULTI (multi input) enables users to perform a fatigue analysis in frequency domain with techniques that are often used for dynamic structural analyses

Brochures, Technical Papers

CAEfatigue VIBRATION (CFV) - BASE SHAKE

The CF_BASE tool provides rapid and accurate structural response and fatigue results for a single input stress loading with virtually no limit on model size being analyzed

Brochures, Technical Papers

CAEfatigue VIBRATION (CFV) - MULTI

The CF_MULTI provides rapid and accurate random response and fatigue solver results that have virtually no limit on model size being analyzed

Brochures, Technical Papers

CAEfatigue VIBRATION for Automotive Systems

CAEfatigue VIBRATION is a powerful domain random response post processor and fatigue solver that works with mixed random (Power Spectral Density) and deterministic loading sources in a way not currently possible with existing products.

Brochures, Technical Papers

White Paper: Frequency FE-Based Weld Fatigue Life Prediction of Dynamic Systems

In most aspects of mechanical design related to a motor vehicle there are two ways to treat dynamic fatigue problems, that is time domain vs. frequency domain approach. Time domain approaches are the most common and most widely used especially in the automotive industries and accordingly, it is the method of choice for the fatigue calculation of welded structures.

Technical Papers

White Paper: Simultaneous Durability Assessment and Relative Random Analysis Under Base Shake Loading Conditions

For many automotive systems, it is required to calculate both the durability performance of the part and to rule out the possibility of the collision of individual components during severe base shake vibration conditions. The check for “collisions” has previously been done separately with the resultant “doubling up” of the analysis being both time-consuming and cumbersome. However, new technological advances now make it possible to do both these calculations at the same time and this paper will present results for an exhaust model analyzed using NASTRAN.

Technical Papers

White Paper: Creating Accurate Surrogate and/or Accelerated Loads for Known Models or Structural Systems Types

For laboratory-based simulation, especially of parts or subsystems, there is a need (usually because of available test equipment) to simplify the loads down to single input loads one at a time (eg, X, then Y, then Z) and this poses significant challenges. Two common approaches are currently used. This paper presents the details of a new approach which is a variation of the FDS approach but using the actual system properties.

Technical Papers

Frequency Domain Analysis for Fatigue and Random Response

Frequency domain methods for fatigue analysis and for general random response analysis have experienced a resurgence over the last few years due to improved technology and better computational processes. Today, a complete range of models can be processed from full vehicle systems to local component systems. Single input loads and multiple correlated input loads can be processed. Complex loading conditions can be handled, which contain random and deterministic components like a sine sweep. Different kinds of fatigue life calculations can be done including both Stress-Life and Strain-Life approaches.

Webinars

White Paper: OHB & CAEfatigue - Simultaneous Durability Assessment and Relative Random Analysis Under Base Shake Loading Conditions

For many aerospace systems it is required to calculate both the durability of the part and to rule out the possibility of collision of individual components during severe base shake vibration conditions. Advanced frequency domain methods now exist to enable the durability assessment to be undertaken fully in the frequency domain and utilizing the most advanced and efficient analysis tools.

Technical Papers

Success Story: OHB System AG

HyperWorks and the Altair Partner Alliance Streamline Development Process of Optical Satellite Components at OHB System AG.

Customer Stories

Top Use Cases: CAEfatigue VIBRATION

Presentation introducing a few of the top use cases for the random response and fatigue software, CAEfatigue VIBRATION.

Customer Stories

Webinar: Random Response & Fatigue Optimization in the Frequency Domain

This webinar will show the workflow of frequency based methods for random response and fatigue between MotionSolve, OptiStruct, CAEfatigue VIBRATION, HyperStudy and HyperView. Please note: You will need to login to Altair Connect to view this recording.

Webinars

Random Response & Fatigue Optimization in the Frequency Domain

In this paper, application of frequency based methods for random response and fatigue optimization is demonstrated on an automotive full body system. The process followed uses MotionSolve generated body loads and OptiStruct stress results as input to a CAEfatigue VIBRATION analysis. This process is executed from HyperStudy for optimization and the results produced are then post processed in HyperView. Using the process outlined, it is feasible to achieve considerable weight reduction while maintaining desired fatigue life.

Brochures, Product Collateral

Virtual Durability Process: Bringing Together MBD, FE and Fatigue

Simulation is indispensable within any product development organization. We at Altair believe this outright and you see that in the vision statement from our CEO, to radically change the way organizations design products and make decisions. Simulation driven design is applied at different stages of development, from concept stage to the final design tuning and validation. Optimization is an integral part of it, so your starting point is an optimal design.

Product Collateral

Webinar: Recent Advances – Vibration Fatigue for Aerospace Systems

This webinar will present the latest advances that have been included in the CAEfatigue VIBRATION product for the analysis and design of aerospace systems.

Webinars

CAEfatigue VIBRATION 2.2 Product Overview Video

3 minute video about CAEfatigue VIBRATION 2.2.

Product Overview Videos

CAEfatigue VIBRATION 2.1 Release Highlights

15 minute overview of CAEfatigue VIBRATION version 2.1 highlights.

Videos

Time v Frequency Domain Analysis For Large Automotive Systems

It has been recognised since the 1960’s that the frequency domain method for structural analysis offers superior qualitative information about structural response; But computational and technological issues have held back the implementation for fatigue calculation until now. Recent technological developments have now enabled the practical implementation of the frequency domain approach and this paper will demonstrate this, with particular reference to the technology limitations that have been overcome, the resultant performance advantages, and accuracy. These techniques are of relevance to all the large automotive OEM’s as well as aerospace T1 suppliers and example case studies from these companies will be included.

ATC Presentations

Fatigue, Composites & Optimization: Themes for Partner Presentations at the Americas Altair Technology Conference

Americas ATC 2015 had one of the highest attendance in history, with about 750+ users in a span of 3 days attending workshops and presentations. Close to half the number of partners from the APA were present to interact with customers and showcase their technologies. Sridhar highlights the key points covered in the presentations.

ATC Presentations, Brochures, Presentations, Technical Papers

Partner Spotlight: CAEfatigue

Dr. Neil Bishop, Chief Executive Officer at CAEfatigue Limited, discusses Random Response Durability Analysis software, CAEfatigue VIBRATION, available through the Altair Partner Alliance.

Brochures, Product Collateral

CAEfatigue VIBRATION for Aerospace

One page flyer pointing out CAEfatigue VIBRATION's specific features, workflows and examples for the aerospace industry.

Customer Stories, Product Collateral

CAEfatigue VIBRATION Showcase Video

Short introductory video highlighting strengths and benefits of using CAEfatigue VIBRATION.

Videos

Webinar: Introduction to CAEfatigue VIBRATION: Random Response + Fatigue in the Frequency Domain

Frequency domain analysis is the method of choice for dynamic analysts and CAEfatigue VIBRATION will act like a turbo charger for such methods. This makes it a valuable new tool for durability estimates on large automotive systems and fatigue life calculations for aerospace systems where mixed random and deterministic loads are specified.

Webinars

CAEfatigue SAE Paper

Technical paper discussing advances relating to fatigue calculations for combined random and deterministic loads.

Product Collateral, Technical Papers