What are weakly and strongly coupled structures in piezoelectric energy harvesting?

[nabs16]

Hello everyone (and sorry for my average english),

I have to make a report on an energy harvesting system from vibrations with piezoelectric elements. During my research, i always read that there two cases in a piezoelectric harvesting system which are : weakly coupled strucutre and strongly coupled structure. I made a lot of researchs but i didn't find any definition of these two cases. What is the meaning of weakly and strongly coupled structure ?

Thanks.

 

[anorlunda]

https://en.wikipedia.org/wiki/Energy_harvesting#Piezoelectric that article may be helpful. The "references" listed at the bottom of the article lead you to more detailed sources.

The article does not mention weakly/strongly coupled structure. But my guess is that means whether the piezoelectric device is attached directly to the structure (strong) or attached via a spring or something soft like rubber (weak).

Good luck on your project.

 

[nabs16]

I take note. Thank you ;)