基于回购契约的闭环供应链系统动力学模型构建及仿真分析

The Construction and Simulation of Closed-loop Chain System Dynamics Model based on Repurchase Contract

为了探索回购契约对闭环供应链系统的动态影响，构建了基于回购契约的闭环供应链系统动力学模型，在不同回购契约参数条件下进行仿真，系统地分析了闭环供应链整体及各节点企业的利润变动情况．研究表明：1）上游成员承诺的回购率越高，闭环供应链整体及各节点企业的利润越大．2）在闭环供应链中，制造商所需的协调时间最长，销售商利润最大，回收商利润最小，但随着回购率增加至阈值后，回收商的利润增长率最高．

In order to explore the dynamic effect of repurchase contract to closed-loop supply chain system, the dynamic model of closed-loop supply chain system based on repurchase contract is built in this paper, which is simulated under the condition of different repurchase contract parameters and systematically analyzed the profit changes of the whole closed-loop supply chain as a whole and each node enterprise. The research shows that： 1） The higher the repurchase rate is committed by the upstream members, the greater the profit of the closed-loop supply chain and the enterprises in each node. 2） In the closed-loop supply chain, the manufacturer needs the longest coordination time, the seller＇s profit is the largest and the recycler＇s profit is the smallest. However, with the repo rate grows up to set threshold, the profit growth rate of recycling businesses is the highest.