MMF VM30-H, Инструкция по эксплуатации, Страница: 20 / 58

5.3.4. Comfort Evaluation
The subjective perception of vibrations is determined by a perception limit and a pain threshold.
Table 2 gives a rough orientation for the relationship between vibration level and perception.
However, perception strongly varies with the test person and depends, in addition, on other
influences like age, gender, health condition, attentiveness, type of activity, temperature and
noise.
RMS of frequency weighted acceleration
m/s²
Perception
<0.01 not perceptible
0.015 perception limit
0.02 just perceptible
0.08 well perceptible
0.315 strongly perceptible
>0.315 very strongly perceptible
Table 2: Relationship between the RMS of weighted acceleration and the subjective perception
in the case of sinusoidal vibration (VDI 2057)
Well-being under the influence of vibration has to be evaluated situationally. So the vibration of
a passenger vehicle is rather regarded as disturbing than the vibration of a building machine.
Although there is no general relationship between well-being and acceleration, the interval RMS
can be measured in three directions and reported for comparisons. For some purposes, like
passenger transport, vibration total value Ahv may be measured.
5.3.5. Reporting of Measuring Results
The report of the measuring results should include the following information:
•
Client
•
Purpose of measurement
•
Location, date and time
•
Name of test person
•
Name of evaluating person
•
Description of activity
•
Description of exposure sections
•
Vibration source, e.g. type of machine or vehicle
•
Exposure directions of vibration
•
Body posture (sitting, standing or recumbent)
•
Transmitting components between vibration source and test person
•
Number, location and mounting of sensors
•
Instrument type (model, serial number, calibration, uncertainty)
•
Results: Interval RMS values a
wT
of frequency weighted acceleration separately for each
direction and each location, duration of measurement, duration of exposure or exposure
sections
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