Equipment for Rational Securing of Cargo on Railway ... - Vinnova

MariTerm AB 2004-01-30 jvgRASLA
Shunting
Vertical acceleration
(m/s 2 )
Transverse acceleration
(m/s 2 )
Longitudinal acceleration
(m/s 2 )
Values taken from
general guidelines
Values derived from calculations
None hump and fly 0 3.8 6.1
None hump and fly -3.0 2.9 -
Hump and fly 0 3.8 15.4
According to the general UIC:s guidelines a securing arrangement should be designed <strong>for</strong> the
following accelerations:
Shunting
Vertical acceleration
(m/s 2 )
Transverse acceleration
(m/s 2 )
Longitudinal acceleration
(m/s 2 )
Values taken from
general guidelines
Values derived from calculations
None hump and fly 0 - 10
None hump and fly -3.0 5 -
Hump and fly 0 - 40
The largest allowed transverse acceleration <strong>for</strong> the specific nail guidelines reaches about 60%
<strong>of</strong> the general UIC requirements. Corresponding <strong>for</strong> the longitudinal acceleration is about
40% <strong>for</strong> hump and fly shunting and 60% <strong>for</strong> none hump and fly.
5.3 Cross Lashings
5.3.1 Purpose
The purpose <strong>of</strong> this analysis is to calculate how large accelerations a securing arrangement
can withstand when it is designed according to the UIC:s guidelines (RIV Appendix II,
Section 1, 5.4.4). The maximum load <strong>of</strong> the lashings is considered to be half <strong>of</strong> its breaking
strength, which gives a safety factor <strong>of</strong> 2. The figure below shows an example where the
cargo is secured by cross lashings.
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