What is causing the low frequency vibrations?

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LarsT
Newbie
Posts: 5
Joined: Tue Jan 03, 2017 11:08 pm

What is causing the low frequency vibrations?

Post by LarsT » Fri Mar 03, 2017 3:18 pm

Hi, I am still learning how to use my new NVH kit sorry if this is too simple of a question. The customer is complaining of a steering wheel vibration, I recently replaced the tires - two of them had high roadforce readings, however the customer is still complaining of a vibration. I noticed a low frequency that is high but not labled. I thought is might be caused by the road but just curious if anyone could give me and answer.

Thanks Lars
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LarsT
Newbie
Posts: 5
Joined: Tue Jan 03, 2017 11:08 pm

Re: What is causing the low frequency vibrations?

Post by LarsT » Tue Mar 07, 2017 5:41 pm

I have read that the lower frequencies are caused by the cars mass and its suspension system.

tode
OneWave
OneWave
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Joined: Fri Jun 20, 2014 6:59 pm

Re: What is causing the low frequency vibrations?

Post by tode » Tue Mar 07, 2017 6:57 pm

The frequency you see is very low 1,4 HZ , it means 1,4 fluctuations at second for me isn' t possibile the cause are tyres o transmission because their frequency is much more high than 1,4 hz.
If the vibration that you feel is 1,4Hz (1,5 at second), i think the problem come from powersteering .

Martinjensen
TwoWaves
TwoWaves
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Joined: Wed Feb 13, 2013 6:22 pm
Location: Denmark

Re: What is causing the low frequency vibrations?

Post by Martinjensen » Tue Mar 07, 2017 6:59 pm

Hi Lars.

I have previously asked that question.
See this thread: topic15921.html Question 3, and the reply from Pico's NVH expert Steve Smith.

Hope this helps.

Regards Martin

LarsT
Newbie
Posts: 5
Joined: Tue Jan 03, 2017 11:08 pm

Re: What is causing the low frequency vibrations?

Post by LarsT » Tue Mar 07, 2017 8:53 pm

Thanks Martin, I thought I had seen it but it was not coming up in my searches.
Lars

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