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L. Picu et al.
parameters were measured with the Kestrel 5000 Portable Weather Station. All
parameters were measured in the control room and in the engine room.
(b) To assess the decrease in subjects’ efficiency, they were asked to perform the
Purdue Pegboard specific test. The results of the test were related to the vibration
and noise level at the site of the last activities.
(c) The external temperature was between −17 and −18 °C during the night and
−2–−3 °C during the day. The Danube was partially frozen ≈70–75%, and
the wind was very strong and gusty (9 on the Beaufort scale). It was extremely
difficult to travel: The average speed was 2–3 km/h; the work shifts were 4 h.
The crew consisted of six people: one captain, one coxswain, one mechanic,
three sailors.
Measurements were made simultaneously in the control room and inside the
engine room, in four situations: ship starts from the shore, ship’s running, in mooring
maneuver and idle with the generator.
According to ISO 20283-5:2016, ISO 8041-1:2017 [17], ISO 2631-2:2018 and
to the Guide to crew habitability on ships: 2016, only WBV acceleration values
are considered. In this paper, we will consider, in addition to whole-body vibration
(WBV), the hand-arm vibrations (HAV) and the noise, as these factors also contribute
to decreasing the performance of people’s work.
2.1 Measurement of Whole-Body Vibration (WBV)
Whole-body accelerations were measured according to ISO 2631-1 [18] and were
calculated: partial vibration dose value (VDV), partial (daily) exposure A(8), time
to reach exposure action value EAV (VDV option) 9.1 m/s
1.75 , time to reach EAV
(A(8) option) 0.5 m/s
2 , time to reach exposure limit value ELV (A(8) option only)
1.15 m/s
2 , total daily exposure A(8), and total VDV. The calculations were made with
Vibration Calculator—HSE. Measurements were made with vibrometer Maestro
from 01 dB-Stell with SEAT pad underfoot (Fig. 1).
2.2 Measurement of Hand-arm Vibration (HAV)
Hand-arm accelerations were made with vibrometer Maestro and finger support for
triaxial accelerometers (Fig. 2). The accelerometers were 356A16-PCB Piezotronics,
from 01 dB-Stell. With Vibration Calculator—HSE were calculated: exposure points
per hour, time to reach exposure action value T EAV (A(8) option) 2.5 m/s
2 , time to
reach exposure limit value T ELV (A(8) option only) 5 m/s
2 , partial exposure A(8),
partial exposure points, daily exposure and total exposure points (http://www.hse.
gov.uk/vibration/hav/readyreckoner.htm).
L. Picu et al.
parameters were measured with the Kestrel 5000 Portable Weather Station. All
parameters were measured in the control room and in the engine room.
(b) To assess the decrease in subjects’ efficiency, they were asked to perform the
Purdue Pegboard specific test. The results of the test were related to the vibration
and noise level at the site of the last activities.
(c) The external temperature was between −17 and −18 °C during the night and
−2–−3 °C during the day. The Danube was partially frozen ≈70–75%, and
the wind was very strong and gusty (9 on the Beaufort scale). It was extremely
difficult to travel: The average speed was 2–3 km/h; the work shifts were 4 h.
The crew consisted of six people: one captain, one coxswain, one mechanic,
three sailors.
Measurements were made simultaneously in the control room and inside the
engine room, in four situations: ship starts from the shore, ship’s running, in mooring
maneuver and idle with the generator.
According to ISO 20283-5:2016, ISO 8041-1:2017 [17], ISO 2631-2:2018 and
to the Guide to crew habitability on ships: 2016, only WBV acceleration values
are considered. In this paper, we will consider, in addition to whole-body vibration
(WBV), the hand-arm vibrations (HAV) and the noise, as these factors also contribute
to decreasing the performance of people’s work.
2.1 Measurement of Whole-Body Vibration (WBV)
Whole-body accelerations were measured according to ISO 2631-1 [18] and were
calculated: partial vibration dose value (VDV), partial (daily) exposure A(8), time
to reach exposure action value EAV (VDV option) 9.1 m/s
1.75 , time to reach EAV
(A(8) option) 0.5 m/s
2 , time to reach exposure limit value ELV (A(8) option only)
1.15 m/s
2 , total daily exposure A(8), and total VDV. The calculations were made with
Vibration Calculator—HSE. Measurements were made with vibrometer Maestro
from 01 dB-Stell with SEAT pad underfoot (Fig. 1).
2.2 Measurement of Hand-arm Vibration (HAV)
Hand-arm accelerations were made with vibrometer Maestro and finger support for
triaxial accelerometers (Fig. 2). The accelerometers were 356A16-PCB Piezotronics,
from 01 dB-Stell. With Vibration Calculator—HSE were calculated: exposure points
per hour, time to reach exposure action value T EAV (A(8) option) 2.5 m/s
2 , time to
reach exposure limit value T ELV (A(8) option only) 5 m/s
2 , partial exposure A(8),
partial exposure points, daily exposure and total exposure points (http://www.hse.
gov.uk/vibration/hav/readyreckoner.htm).