Abstract: In order to analyze the interaction mechanism between the land port and the urban economy under the “One Belt and One Road” initiative, the system dynamics method was used to build the system model of their interaction. Taking the relevant data of Xian land port and its urban economy from 2010 to 2017 as an example, the simulation was carried out. The results show that simply increasing infrastructure investment of Xian land port has no obvious effect on the throughput driving benefit, but the freight volume of port area has a significant effect on it; the throughput is positively correlated with industrial added value of Xian city, especially the benefit of driving GDP growth is obvious; Xian land port has created an annual average indirect GDP of RMB 10.906 billion, which has driven an average annual employment population of 84 000.

Key words: traffic and transportation engineering, land port, urban economy, system dynamics, interaction mechanism

摘要： 为分析“一带一路”倡议下陆港与城市经济的相互影响机制，运用系统动力学方法构建两者相互影响的系统模型。以西安陆港与其城市经济在2010—2017年间的相关数据为例进行仿真。结果显示：单纯增加西安陆港基础设施投资对吞吐量带动效益不明显，而港务区货运量对其影响显著；吞吐量与西安市产业增加值呈正相关，尤其带动GDP增长效益明显；西安陆港创造年平均间接GDP为109.06亿元，拉动年平均就业人口8.40万人。

关键词: 交通运输工程, 陆港, 城市经济, 系统动力学, 互动机理