Research On The Elasticity Of Container-Terminal Handlinga System For Different Steady-state Levels

As the hub station of cargo water and land transportation,container terminal plays an important role in the global logistics transportation chain.However,in daily operation,the terminal is often disturbed by external uncertain factors,and the ability of different terminals to maintain stability is obviously different.System elasticity is a major system characteristic of complex systems in the face of uncertain interference.It has become a hotspot of many scholars in the past decade.Under the guidance of the theory of dissipative structure,this thesis systematically describes the characteristics of the dissipative structure of container terminals.Based on the generalized definition of complex system elasticity,this thesis establishes the elasticity theory and index system of container terminal handling system,constructs the conceptual model and simulation test platform of container terminal handling system,designs the elastic simulation test method,and deeply studies the measurement method of container terminal handling system elasticity.The main research results are as follows:(1)Based on the theory of dissipative structure,this thesis analyzes the steadystate form of the container terminal handling system away from the equilibrium state,summarizes the different steady-state forming conditions of the handling system away from the equilibrium state.Then this thesis analyzes the three uncertainty factors including people,things and environment that affecting the steady-state level of the handling system and studies the mechanism of action of these factors.(2)Guided by the elastic theory of classical mechanics and combined with the steady-state characteristics of complex systems far from equilibrium,this thesis studies the elastic concept,establishes influencing factors and basic properties of container terminal handling system and the elastic index system of container terminal handling system.The system determines the weight of the index through the analytic hierarchy process and finally derives the formal description method.(3)This thesis establishes an elastic simulation test platform for container terminal handling system.In combination with the engineering project,this thesis establishes conceptual model of the terminal handling system,completes the simulation module development and test platform construction of the handling system,verifies the effectiveness of the platform,and proposes the simulation test method for system steady-state deviation and recovery.(4)Based on the built simulation test platform,the simulation system suffers from the system's steady-state deviation and recovery process after accidental interference.According to the designed simulation scheme,this thesis selects different change factors to conduct elastic test on different steady-state systems.According to the test data results,this thesis completes a quantitative study on the elasticity of the container terminal handling system.This thesis studies the dynamic characteristics of container terminal handling system from the perspective of physical thought method,which is beneficial to improve the planning,design and operation management level of container terminal.The research results have important engineering value and academic significance.