Modal Chart
Modal Chart
(OP)
Please expaine me why the mode seperation chart is important in nvh and on what basis it is defined?
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RE: Modal Chart
RE: Modal Chart
RE: Modal Chart
Correct
" Second thing until what order of engine excitation I can chek for the resonances?"
Depends on your engine configuration
Typically I'd look at 0.5, 1, 2, firing order and 2*firing order as an absolute minimum. 2 is very dependent on configuration. 1.5 can be important.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Modal Chart
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,
RE: Modal Chart
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Modal Chart
RE: Modal Chart
Also lower frequency modes of a given subsystem are more 'powerful' than higher frequency modes, in general.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Modal Chart
What do you mean by powerful? Please expain..
Thanks,
RE: Modal Chart
What NVH related books do you have?
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Modal Chart
Thanks,
RE: Modal Chart
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.