Dear Muthanna

Strain gauging is the best way to compare... If not one can go for displacment measurements.

Some of my works displays the FEA Predictions and actual measurement correlations

Cheers

Ramanan

It depends on your application.

Test correlation in structural dynamics usually involve modal comparisons between an experimental modal analysis and your FEM modes, or comparison of frequency response functions.

For more specific applications where the representation of a given field is of particular interest, your experimental setup must provide an information closely related to it. You did not provide any details on your application, so the answer can only be very general.

I agree with Mr. Guillaume Vermot Des Roches. It depends on the applications.

In any case you must check the FE model at different level of observation before delivery it. The first one is the global behaviour (displacement of a point, 1st natural frequencies and so on). Than you can pass to the local observation using puntal sensors like strain gauge, accelerometer, and so on. If the material is not homogeneous or anisotropic check accurately the corrispondence between the numerical points and phisical ones.

It could be better if you specify your test bench.

regards.

Luigi Di Palma.

Hello,

There are two simple checks that could be done before coming with dynamic measurements (modal analysis):

(1) Mass and the position of the center mass;

(2) Static displacement (as Luigi di parma stated) under imposed forces (according to the directions of flap and lag) and moment.

Regards,

Truong V.K.