Distributed Robust Chance-Constrained Empty Container repositioning Optimization of the China Railway Express

Xing, Lei; Qi, Xu; Cai, Jiaxin; Jin, Zhihong

doi:10.3390/sym12050706

Cited by 4 publications

(3 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The limit of this approach, which operates by means of discretization, is a considerable amount of calculations; the greater they are, the greater the discretization is. The sensitivity analysis aims to identify the contributions given by various parameters that characterize the structure in terms of strength and weight, providing design indications capable to obtain less generous, but more accurate sizing, which is better suited to stress problems detected by the tank container examined [37][38][39].…”

Section: Discussionmentioning

confidence: 99%

Study of Tank Containers for Foodstuffs

et al. 2021

View full text Add to dashboard Cite

In this study, we examined a tank container for foodstuff that is generally used for the transport of foodstuffs. With the aid of the “ANSYS R17.0” program code, a numerical model of the tank container for foodstuffs was realized. Further, to validate the considered model, the tank container considered was submitted to the most important ISO tests concerning both its support frame and the tank. The results obtained from the FEM analysis, in terms of displacement for each test, were compared with those provided by the manufacturer and related to the tank container considered, evaluating the difference between the numerical results with the experimental ones. This allowed us to validate the model examined. Furthermore, the results obtained from each test, in terms of stress, have made it possible to locate the areas with the highest equivalent stress and quantify the maximum value, comparing it with the allowable stress. In this way, a better understanding of the structure was achieved, and it was detected that the most stressed area is that of the connections between the container and the frame. Furthermore, modal analysis was carried out, in which the natural frequencies relating to the most dangerous modes of vibrations were found, that is, with the lowest frequency values. Finally, changes for the considered tank container were examined, and it was found that, by changing parameters, such as the thickness of the plate and skirt, and subsequently acting on the arrangement of the corner supports, the highest value of the stresses generated by the loads related to the ISO tests, it is significantly lowered, resulting in a better distributed stiffening of the structure and a reduction, although minimal, of weight. It is evident that this modeling and validation method, suitably integrated by further calculation modules, can be used in an iterative optimization process.

show abstract

Section: Discussionmentioning

confidence: 99%

Study of Tank Containers for Foodstuffs

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Zhang et al [8] studied the empty container repositioning problem of China EU sea land multimodal transport in the context of the "the Belt and Road", modeled the problem, and designed an artificial bee colony algorithm to solve the model. Xing et al [9] analyzed the uncertain demand for empty containers and partial information such as the mean and variance of demand for foldable containers in the context of land-sea intermodal transportation. Using the distributed robust chance constrained programming method, they conducted some research on the optimization of multi-time empty container repositioning problems in China's railway express transportation.…”

Section: Introductionmentioning

confidence: 99%

Joint Optimization of Inventory and Repositioning for Sea Empty Container Based on Queuing Theory

Wang

Zheng

2023

JMSE

View full text Add to dashboard Cite

Approximately 20% of global container transportation activities are used for empty container repositioning, which does not generate profit margins. For container supply ports, in addition to periodically transporting excess empty containers to container shortage ports to reduce their inventory costs and meet empty container demand of container shortage ports, they also need to maintain a certain amount of empty container inventory to meet their uncertain needs in the future. This paper considers the container supply port and container shortage port as a whole, so that the container supply port maintains a certain amount of empty container inventory to meet its own uncertain needs, and empty container repositioning is carried out based on this. Based on queuing theory, an empty container repositioning model was established with the objective function of minimizing the total cost of the empty container inventory system and the empty container repositioning system and designing genetic algorithms to solve the model. The results indicate that considering empty container inventory and repositioning as a whole resulted in a total cost reduction of approximately 7.2%. Finally, a sensitivity analysis was conducted by changing the parameters in the model, and the results of the sensitivity analysis provided support for the decision-making of shipping lines in different situations.

show abstract

“…Other publications [12][13][14] describe the prospects of the development of combined transport, including sea transport. The requirements for ensuring the safe operation of combined transport were formulated.…”

Section: Introductionmentioning

confidence: 99%

Strength Analysis of an Open Car Body with Honeycomb Elements during Ro-Ro Transportation

Gerlici,

Lovska,

Fomin

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

This article presents the determination of the bearing structure loads of an open car during ro-ro transportation. A special solution for an open car is the application of elastic, viscous honeycomb panels in the frame. This engineering solution can decrease the load of the bearing structure of an open car during interactions with multiple-use lashing devices. This article presents the mathematic modelling of the dynamic load of an open car during ro-ro transportation. This calculation is based on the most popular load diagrams for the bearing structure of an open car applied for sea transportation, namely the rolling motion and the turning motion of a train ferry approaching a dock. It was found that the application of honeycomb panels can decrease the dynamic load of a rail car in comparison to a standard structure by about 25%. The results of the strength calculation of the bearing structure of an open car demonstrated that the maximum equivalent stresses do not exceed the allowable values and are 30% lower than the stresses that emerging in the standard structure. The conducted research can be used by engineers who are concerned about safe and environmentally friendly transportation via train ferries and more efficient ro-ro transportation.

show abstract

Distributed Robust Chance-Constrained Empty Container repositioning Optimization of the China Railway Express

Cited by 4 publications

References 26 publications

Study of Tank Containers for Foodstuffs

Study of Tank Containers for Foodstuffs

Joint Optimization of Inventory and Repositioning for Sea Empty Container Based on Queuing Theory

Strength Analysis of an Open Car Body with Honeycomb Elements during Ro-Ro Transportation

Contact Info

Product

Resources

About