원문정보
초록
영어
An efficient, smart, energy-saving automated container terminal (ACT) scheme is introduced in this paper, in which one three-dimensional container distribution system is proposed between crane yard and storage yard. In this scheme, container vehicle-low bridge coupled vibration greatly affects the ACT’s structural safety and handling efficiency. Firstly, the coupled vibration time-domain responses, inspired by self-excitation including track irregularity and hunting movement as well as environmental (wind and seismic) load, were obtained by using free-interface component mode synthesis (CMS) method. The relationship of response and vehicle speed, wind velocity and ground motion intensity was studied as well. Accordingly, the structural safety, running safety and stationarity were assessed by indicators such as deflection-span ratio, vibration acceleration, wheel-rail relative displacement, etc. The container vehicle speed limits of the low bridge rigid supported or lead rubber bearing (LRB) supported under seismic and operational wind load were compared. The results of model test and prototype simulation prove with each other, which validates LRB’s effects on vibration isolation and absorption, thus can increase ground motion intensity and vehicle speed thresholds to structural safety.
목차
1. Introduction
2. Structural Coupled Vibration Analysis of the Three-Dimensional Distribution VB System in ACT
2.1. System Components
2.2. Container Vehicle-Low Bridge System Model
2.3. Numerical Simulation of Track Irregularity and Wind Load Stochastic Processes
2.4. Self-excitation Vibration Simulation and Model Test Results Comparison
3. Structural Safety Assessment of the Container Vehicle-Low Bridge System
3.1. Vehicle-bridge Safety Evaluation Standard
3.2. Structural Safety Assessment under Wind Load
3.3. VB Coupled Vibration Response under Seismic and Operational Wind Load
3.4. Structural Safety Assessment under Seismic and Operational Wind Load
4. Conclusions
Acknowledgements
References