Recent content by vibrostics

Thnak you Rob45 for proving the name of the handbooks.

what are the thumb rules to start with selection of the mounts?

How the resonances are addressed and how to zero on the stiffness and damping values?

Please suggest me one. I dont have specific NVH related book. Thanks,

I would like to know the Role of the Mounts in NVH. I do understand them as the members, which isolates two systems from being coupled. Other then this what are the NVH criteria’s which drive the mount stiffness tuning? Please explain.. Thanks,

Greag, What do you mean by powerful? Please expain.. Thanks,

Coming back to the Mode chart, within the subsystem it self do we need to have pure specific mode shapes at a perticular frequency level or does not matter?

Greg, Does that mean the orders of the engine are assoiciated witht the idle firing speed (only) of the engine to decide on subsystem's resonance frequencies? Regards,

Thank you for the answer. I am not very clear on the orders of the powertrain excitations. Since Engine can run at any rpm in its operating range will excite most of systems resonance frequencies. Second thing until what order of engine excitation I can chek for the resonances?

Please expaine me why the mode seperation chart is important in nvh and on what basis it is defined?

What is the working principle of these acoustic cameras?

Thank you for the responses. Greg, you are correct. It is a hard earned knowladge.

Thank you. Please explain me more about how the floor pan vibration is so important than any other panel noise radiation/vibration ans also about the various shake targets.

Please explain the basics of the Idle NVH and Road NVH. What kind of targets to be met for each of them and the criterias to meet the same.

Do you suggest any good NVH books and readings which gives more perspectice on the practical aspects? Thanks.