Quay crane scheduling optimization with dual-cycling operation considering ship's stability and heel angle
The complexity of quay crane scheduling with dual-cycling operation lies in the need to make decisions on the se-quence of container handing operations,with considering the constraints of the ship's stability,heel angle and hatch cover.An optimization model for quay crane scheduling was estab-lished by taking the minimum energy consumption of quay crane as the optimization target.The improved variable neigh-borhood search algorithm based on the Johnson rule was de-signed to solve the model.The effectiveness of the model and algorithm was verified by numerical experiments,and the im-portance of constraining ship stability and heeling angle during loading and unloading operations was clarified.The optimal time interval for checking ship heeling angle was determined to be 2 minutes.The proposed model can improve the handing efficiency and reduce the energy consumption of quay crane,in addition to ensure the safety of container handing operation.
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