Does anyone have a reference for the relaxation of screw joints in micrometer as function of aspects such as surface roughness and paint type and paint thickness?
Thanks!
Assume that I have a board like structure lying down and suspended in its four corners. I have measured or calculated the accelerance (a/F) between a point A of the board and the base. I now introduce four isolators between the base and the four corners of the board.
My question:
Is there an...
When using a 3DOF servohydraulic shaker, I have lately encountered some odd harmonics in my 3DOF response signal. The frequency content of the non-stationary noise that I try to simulate is 5-35 Hz.
When measuring using a MTS flextest system, the parasitic harmonics end up at around 80Hz. All...
I am performing a transient FEA on a non-linear system. The loading signal has been filtered properly and has no aliasing.
However, as the system is non linear, the output signal will have a wider frequency content. How do I know if aliasing has occurred or not?
I assume that the key somehow...
When I try to perform a random vibration analysis with MDOF load and the correlation between the loading DOF:s described through COVAL and QDVAL, the results spectra are erroneous. The amplitude of the PSD spectra obtained in post26 become partly negative.
Ansys claims that this is an error...
