Vibration Analysis Consulting Services at Predictive Engineering
A quick graphical overview is presented of our +20 years in the idealization of structures for finite element analysis (FEA) vibration analysis. Our goal is to keep our clients’ structures from experiencing disastrous resonance during testing and in service. As part of our work, we have done User Guides on the main suite of linear dynamics from normal modes, modal frequency analysis (sine sweep), response spectrum analysis (seismic and shock) and PSD.
Besides linear dynamics, we have experience in nonlinear transient dynamics using LS-DYNA where the nonlinearity is low but the vibration response is deadly. Thru the years we have gained experience using a variety of specifications for wind turbines (IEC 61400), seismic analysis of nuclear waste storage vessels (ASCE 4-98, ASCE 7-02 or IBC) and general vibration analysis of electronic equipment and general structures using MIL-STD-810E, -810F, MIL-STD-167, RTCA DO-160F and UBC.
We don’t want to bore the reader, so only a subset of our work will be presented and then burned into a video for publication. What we hope that one will take away from reading this case study is that our experience has been tested and validated in hundreds of simulations and when you work with one of our engineers, you are leveraging hard-won industry experience that is uniquely qualified to ensure that your structure will only vibrate as you want it to vibrate.
Figure 1: Vibration Analysis of Aerospace Electronic Systems - Normal Modes and PSD
Selected examples of our linear dynamic work in the aerospace industry. We also have experience in launch dynamics, rotating wing PSD induced vibration and general aviation vibration. For nonlinear vibration analysis, we use LS-DYNA.
Figure 2 : Vibration Analysis of Heavy Equipment - Normal Modes and Modal Frequency Response
This section could be described as the idealization of engineered structures and systems into predictive numerical models. The analyses shown on this slide were validated against experiement and in service.
Figure 3 : Vibration Analysis of Structures - Seismic Response Spectrum Analysis
Seismic analysis of large ASME Section VIII, Division 2 "Design-by-Analysis" vessels is one of our specialities at Predictive Engineering. We have done work on vessels that have been installed all over the world.
Figure 4 : Vibration Analysis of Shaker Equipment - Normal Modes - Mass Participation Analysis
Decades of experience with the FEA of shaker equipment from food processing to bio-fuel materials. Our consulting services have served the test of time with millions of cycles on vibrating equipment. Along with the standard normal modes analysis, the accompanying stress analysis work has been leveraged toward fatigue analysis of the equpment.
Figure 5 : Vibration Analysis of Composite Structures - PSD
Predictive's composite engineering analysis services have been leveraged on several aerospace programs from large composite structures to aviation interiors work (LS-DYNA sled test). This example shows a large composite container that was first preloaded to seal its two halves and then subjected to a PSD analysis. Details of this work can be found at www.dynalook.com under Predictive Engineering.
Figure 6 : FEA Vibration Analysis Knowledge Based on 100s of Projects
Our work speaks for itself.