What if structural dynamics analysis model updating is not possible?
Sometimes there are valid reasons why this approach cannot be followed, like:-
Structural dynamics analysis is too expensive
Implementing the capability to perform structural dyanmics analysis throughly and accurately involves resources, mainly time and specialist labour. But structural dyanmcis analsyis and model updating becomes a true investment for the future, as the constraints and assumptions taken for modelling are refined by the experimental results, and can be used for future modelling on similar products and environments.
Structural dynamics analsyis is too complex
A good example of this, is a electronic circuit on a printed circuit board (PCB).
In our experience, during flight certification using RTCA/DO-160 and Mil-Std-810, there are components that fail during vibration testing using a vibration shaker.
These are usually
Fine wired components
Internals of components
Relatively heavy components detaching
Capacitor legs fatiguing due to vibration
Ceramic components cracking
These are typical failures that we have seen over the last 25 years on PCBs.
We have generated a lessons learnt database that assists us in solving these failures cost effectively and time efficiently, and quickly.
There are also other aspects that contribute to failures on PCBs. And they are:
Designers not adequately informed of the complete nature of the tests that the component will undergo
A lack of structural dynamics and vibration testing knowledge and experience
The incorrect fixings and the locations of the mounts or stand-offs
This is where the true understanding of structural dynamics analsyis is an asset to any design and manufacturing company.
So if you need help with any aspects relating to structural dyanmics analysis, please get in touch.
We do not charge for phone calls and advice. We are just passionate about the structural dynamics analysis and model updating field of engineering, and are happy that we can help you.