Siemens SIMOTION D4x5-2 DP/PN Operating Instructions Manual page 359

Approximate relationship between effective pendulum length and hoisting height
l
eff
h
factor
offset
Oscillation test procedure
Proceed as follows:
● Move the hoist into a low position and make a note of hoisting height h
● Excite a skew oscillation and measure the oscillation frequency or the oscillation period
You can do this using a stopwatch or the diagnostic program SIMOCRANE CeCOMM (tab
"Effective pendulum length"), or by making a trace recording of the camera angle psi_cam.
These methods allow simultaneous recording of multiple oscillations, making it easy to
calculate the period per oscillation or oscillation frequency f.
The effective pendulum length I
using the equation below:
● Repeat this measurement at a higher hoisting height h
pendulum length l
● Calculate the factor and offset from the two equations (in this example, calculations are
based on a container which is 20 ft long):
● Calculation of the factor:
SC integrated STS, GSU
Operating Instructions, 07/2019, A5E48271265B AA
Approximate effective pendulum length [in mm]
Measured hoisting height
P304, P306, P308, P310 as a function of the spreader length
P305, P307, P309, P311 as a function of the spreader length
l Effective pendulum length [in mm]
eff
f Oscillation frequency [in 1/s]
g Acceleration due to gravity [in m/s
eff2.
l Effective pendulum length at hoisting height 1 [in mm]
eff1
h Hoisting height 1 [in mm]
1
P304 Factor pendulum length for 20 ft container
P305 Offset pendulum length for 20 ft container [in mm]
l Effective pendulum length at hoisting height 2 [in mm]
eff2
h Hoisting height 2 [in mm]
2
9.5 Commissioning TLS (hydraulic system)
applicable to the hoisting height h
eff1
]
2
Commissioning AddOn Software
1
can then be calculated
1
and calculate the effective
2
359