Research On The Snow Removal Process And Key Structure Optimization Of A New Multifunction Snow Removal Vehicle For Airport

In recent years,the phenomenon of flight delays has become more and more serious,and the probability of flight delays due to abnormal weather has reached 51.28%among the factors of flight delays under human control One of the abnormal weather factors for the north and cold areas of China the biggest impact is snow.The current situation of flight delays caused by snowfall and the proposal that the 13th five-year plan for the development of Civil Aviation in China will achieve 80%flight normal rate by 2020,it is very important to study the new-type snow removal vehicle for the on-time flight and the efficient and fast snow removal at the airport.Aiming at the need of efficient and rapid snow removal in the airport,this paper studies the flow field of the air blast system of the multifunctional snow removal vehicle and the dynamic characteristics of the snow removal process by means of unsteady and two-phase flow analysis and numerical simulation And make dynamic optimization design.The main research contents of this thesis include:(1)Design of overall structure and parameters of blast system.Based on the design of the overall structure and parameters of the blast system,a three-dimensional solid model of the blast system is established,which lays a foundation for the later analysis of the dynamic characteristics.(2)Study on dynamic characteristics of the flow field in the blower system of the multifunctional snow removal vehicle based on moving grid.By establishing the numerical simulation model of the air blast system,the numerical simulation and dynamic characteristics of the flow field in the channel are studied by using the method of gas-solid two-phase flow analysis.The aim of studying the spatial distribution and movement law of snow particles is achieved.(3)Study on the structure and dynamic optimization design of the performance parameters of the multi-function snow-blower system.In order to optimize the structure and parameter performance of the blast system,the structure of the blast system is analyzed based on the comparison of simulation results and orthogonal experiment Improved snow removal efficiency.(4)Study on dynamic snow removal process of snow-pushing Shovel.By establishing the model of snow shoveling and simplifying the model,the movement of Snow Shoveling was analyzed and the track curve of snow particles on snow shoveling was drawn,and the external flow field was simulated Dynamic analysis of snow removal process by snow pushing with dynamic grid.(5)Study on structure and performance optimization of a new type snow-pushing shovel.In order to achieve efficient and rapid snow removal,the driving angle and cutting angle of the snow shovel were optimized based on ant colony algorithm,so as to shorten the time of removing the same amount of snow.