Static calculation of a cable winch
The design of a drum of a multilayer cable winch depends heavily on the maximum hoop pressure from the cable package. The DNV Rules for Certification of Lifting Appliances prescribes the hoop stress with a c-factor times the hoop pressure for single layer winches. In a 2008 revision, this factor was changed suddenly from 1.75 […]
Extended life time calculation of the Straddle Carrier
The original specification of the straddle carrier accounted for a maximum of 630.000 load cycles which is equivalent to 52.500 operational hours. After moving more than a 1.000.000 containers a remaining fatigue life of the metal structure of the straddle carrier was advised. Because of its high center of gravity and the absence of shock […]
Gantry cranes transportation by a sea-going barge
Static calculation, stability and buckling checks were performed to guarantee a successful transfer under high sea conditions. The structure of STS cranes (Ship To Shore cranes) can withstand high hoisting loads but for the side accelerations due to the barge motions, transport reinforcements are necessary. The relevant barge motions, accelerations, and rotations (are calculated for […]
