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vibration

Vibration is a mechanical phenomenon whereby oscillations occur about an equilibrium point. The word comes from Latin vibrationem ("shaking, brandishing"). The oscillations may be periodic, such as the motion of a pendulum—or random, such as the movement of a tire on a gravel road.
Vibration can be desirable: for example, the motion of a tuning fork, the reed in a woodwind instrument or harmonica, a mobile phone, or the cone of a loudspeaker.
In many cases, however, vibration is undesirable, wasting energy and creating unwanted sound. For example, the vibrational motions of engines, electric motors, or any mechanical device in operation are typically unwanted. Such vibrations could be caused by imbalances in the rotating parts, uneven friction, or the meshing of gear teeth. Careful designs usually minimize unwanted vibrations.
The studies of sound and vibration are closely related. Sound, or pressure waves, are generated by vibrating structures (e.g. vocal cords); these pressure waves can also induce the vibration of structures (e.g. ear drum). Hence, attempts to reduce noise are often related to issues of vibration.

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  1. M

    loud humming and vibration in water pipes

    We live in a top floor tenement flat. I have called Scottish Water about this problem and they say that they have not carried out any work in our area for the last 2 weeks and that none of my neighbours have reported a problem. We have intermittently heard a loud humming and vibration (not...
  2. G

    Noise and vibration from HW system when CH is on.

    Hi all, In the hotpress, I'm getting noise and vibration at the 'cold return' pipes heading to the boiler from the hot water cylinder, heating coil. This strangely happens when the the CH is ON but when the hot water heating is OFF. The vibrations can be felt when holding the pipes where...
  3. U

    Humming and vibration

    Alright looking for a plumbing related answer here if you can, my hot water tap in my bathroom up the stairs doesn't work, the shower and sink taps work fine and every 5 - 6 hours there's a humming vibration noise coming from the down stairs toilet floor/wall, a replaced a washer on the tap...
  4. C

    Vibration from leaking stopcock??

    Can a dripping and/or faulty stop valve cause water pipes in the house to vibrate? There is a deep humming, vibrating bass sound that is present all the time in my house. Started after having our shower repaired and the water had to be shut off. The stopcock is dripping from the gland, could...
  5. C

    Vibration with cylinder installation

    Hello All, Recently fitted a 'slim' Gledhill vented to a custs house, when there's a demand for heating the cylinder there's a vibration noise, is this the loose metal coil these have inside for primary heating .. my mate reckons it could be!?
  6. W

    Toilet Vibration

    i think i have a problem with my TOILET CISTERN FILLER VALVE, mine vibrates everytime the toilet is flushed, the problem is, im not a plumber and i need some advice on which part i need, the only thing i really know is that it is a BOTTOM ENTRY CISTERN heres a picture of the filler valve if...
  7. A

    Ferroli Modena 80e - Intermittent CH On/Off and Vibration Noise

    Hi, I have a Ferroli Modena 80e and it has developed a weird problem. BG are due to investigate tomorrow but I'd like some Forum advice re the problem; if for no other reason than to properly articulate the issue to BG. The facts (apologies for any terminology issues): boiler pressure set at...
  8. R

    3 port valve

    Hi ,when my central heating goes off in the evening the 3 port valve does not close off and ther is a humming and a vibration from even hours after wards. the only way to stop it is to turn off the electric and the valve closes. i turn the electic back on and no noise, no vibration. Its a new...
  9. J

    intermittent vibration from radiators

    Hi, i work with a gas safe engineer and 3 months ago we installed a new combi boiler (worcester greenstar 42cdi) , 8 radiators and 1 towel rail. The system has been working fine up until a few days ago. The customer has phoned me and said that after the heating has been on for some time he...
    • jimbosweed
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    • Replies: 13
    • Forum: Plumbing Jobs | The Job-board
  10. C

    CH vibration

    Hi all am currently hearing a loudish vibration sound (rather than rattling) in the CH system, particularly upstairs. Its deffo not the pump, and the rads are fully bled. Prob an obvious one for you guys but not for me! thanks
  11. P

    anti vibration inserts

    Hi Guys does anyone know where I can get some anti vibration inserts for radiator brackets please. I have installed the rads on a job and the painters removed the rads to paint and lost some of the inserts. The results are the rads are rocking a bit. Cheers guys. - Pete
  12. A

    Intermittent regular vibration in cold water pipes

    For the last 5 days and nights we have heard a regular intermittent vibrating noise coming from (we think) the cold water pipes - you can feel a vibration when you hold the one going to the bathroom sink. It comes on quite suddenly, vibrates (fairly gently) then fades over a period of about 30...
    • AliG
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    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  13. S

    Thermostatic radiator valve TRV noise & vibration

    I have a TRV that has started to vibrate and cause a noise just as the room temperature reaches the setting. When I turn the thermostat, either off or on noise stops. When I turn the thermostat from 5 down, when it reaches room temperature there is a loud clunk and vibration until it is turned...
    • swansojb
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    • Replies: 12
    • Forum: Plumbing Jobs | The Job-board
  14. B

    ariston eurocombi.. continuous vibration noise

    This boiler (23 mffi) works well but there has been a continuous vibration noise ,not from the pump, but from a small solenoid in the centre, what is this and howeconomical to fix?
  15. N

    Baxi solo 2. sort of vibration sound

    Hello everyone, When the boiler goes off (when room up to temp) there is a sound like a loud-ish vibration. It lasts for about 30 seconds or so before going quiet. I can also hear it in the airing cupboard but not sure if it comes from there (the pump) or not. the boiler is working fine, rads...
  16. B

    Vibration in pipework - NOT water hammer!!

    Hi there, have just been to a customer's house and whenever she flushes the WC on the first floor and once it's stopped re-filling there's a loud vibration - almost like a macerator pump starting and stopping. It's not in the cistern itself, and I can't trace it without raising floorboards etc...
  17. P

    Worcester Bosch Greenstar 27CDi boiler vibration

    Since the condenser pipe defrosted the boiler makes a vibration noise every time the green burner light comes on be it for CH or the water heating. What is causing this and can I continue to use it?
  18. S

    strange noise

    got a problem when ever i turn on my hot tap i get a strange noise coming from some where sounds like the mains just wondering if i need to chage the ballvalve in my loft tank as when the noise happens if i flush the wc it stops the noise. got a hot water cylinder and i think its the ball...
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    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  19. P

    Radiator noises

    My bedroom radiator has a Belmont Pegler thermostatic valve with a chrome 'Button' on the top. It is about 12 years old. If I leave the radiator on, after 45 minutes or so I start to hear a bit of a whine which builds up and then a few moments later I get a horrible vibration which sounds like a...
    • Pasty65
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    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  20. H

    Suprima 40 Tripped, no longer fire up with HW, no response with CH

    My boilers seems to have lots of problem this upcoming winter! It is a Suprima 40 wall mounted gas boilers with latest version PCB(5111606) fitted? The initial problem is CH won't come on or( have any response) after you switch it on. HW was working perfectly all right(click, fan, fire up....)...
    • hjlp
    • Thread
    • air bath bleeding boiler boilers central heating system control fire flame gas ignition longer pcb pipes power problem pump response suprima switch tap vibration wall winter
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