Thèse soutenue

Planification logistique dans le transport de pétrole brut

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Auteur / Autrice : Qingning Shen
Direction : Haoxun ChenFeng Chu
Type : Thèse de doctorat
Discipline(s) : Optimisation et sûreté des systèmes
Date : Soutenance en 2009
Etablissement(s) : Troyes
Ecole(s) doctorale(s) : Ecole doctorale Sciences pour l'Ingénieur (Troyes, Aube)

Résumé

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In this thesis, an inventory routing problem in crude oil transportation in real life is studied, in which crude oil is transported from an unlimited supply center to a set of customer harbors to satisfy their dynamic demands over multiple periods. In the problem, a heterogeneous fleet of tankers consisting of tankers owned by a distributor and tankers rented from a third party logistics provider, a pipeline, multiple types of routes are considered; both inventory level and shortage level at each customer harbor are limited. The objective is to determine in each period the number of tankers of each type dispatched on each route and their loads, the number of tankers of each type rented/returned at the supply center and the quantity of crude oil flowing through the pipe-line to minimize the total logistics cost. The problem is extremely complex, few papers studied it; as the problem is difficult to be solved exactly in a reasonable time, we first formulate the problem as a mixed-integer linear program model, and then develop two optimization methods, a GRASP enhanced with an intensification strategy Path Relinking and a Lagrangian relaxation approach to find near optimal solutions of the problem. Numerical experiments demonstrate the effectiveness of the methods for solving the problem. In addition, we propose an O(T3) dynamic programming algorithm for a simplified version of the problem, in which the crude oil is delivered directly from a supply center to a single customer harbor with dynamic demand by unlimited identical tankers