Vibration Analysis

Identify modes of vibration and extract modal parameters   

Modal Analysis is a specialized product option that identifies modes of vibration and extract modal parameters. It can also animate mode shapes or display Operating Deflection Shapes (ODS) with color-filled contours during animation. 

Modal Analysis features: 

• More accurate damping ratios through enhanced FE modelling 
• Modal Assurance Criterion (MAC) analysis to determine the similarity of mode shapes by comparing the response motion captured using virtual sensors with the measured displacements
• "AutoMAC" matrix to help position virtual sensors and optimize physical instrumentation to capture the modes of interest
• Rapidly comparison of different designs in terms of their dynamic properties
• Noise and vibration related troubleshooting
• Structural Health Monitoring by tracking changes in modal parameters due to damage

Vibration test profile design

Vibration Profile Design (formerly Accelerated Testing) provides the ability to create a representative PSD or swept sine shaker vibration test based on measured data. It uses the fatigue damage spectrum approach as described in NATO STANAG 4370 (AECTP-240)/ UK DefStan 00-35/Mil-Std-810G, allowing users to tailor vibration tests to a target vibration environment. With Vibration Profile Design, users can also compare existing test evidence against the requirements of a known test specification, enabling assessment of whether components in service will likely survive to the target service life. This known safety margin may help extend the life of parts in service or conversely avoid unexpected failures.

With Vibration Profile Design you can:

• Create an accelerated shaker test and assess the impact on shock and fatigue damage
• Rapidly compare an existing test specification with service vibration data
• Extend the life of parts in-service or avoid unexpected failures
• Understand the impact of exposure time in-service and on the test rig