Finite Element Analysis On The Structure Of Railway Refrigerated Container Cold Storage Device

With the improvement of people’s quality of life and consumption level,the logistics industry of fresh products can develop rapidly.In order to meet the long-distance transportation needs of fresh products,CRRC plans to develop railway refrigerated containers.Its core technology is embodied in the cold storage device.When the train is running,the device can work when the container is powered off to maintain the Low temperature state.The train is subjected to shock loads in various directions during its travel,such as longitudinal shocks caused by acceleration and braking,vertical vibration shocks caused by track irregularities,and lateral shocks caused by wind load or curve driving.These loads affect the train.The cold storage device is fixed on the top of the container and is also under impact load.At the same time,because the cold storage device is a temperature control device,the equipment is subject to large temperature changes before and after use,so the cold storage device structure also bears the stress change caused by thermal expansion and contraction,in order to verify the cold storage device under impact load and temperature load It is necessary to carry out statics analysis,fatigue strength analysis and calculation of bolt connection work capacity for the structure of the cold storage device.The thesis completed the three-dimensional design,finite element modeling,static strength analysis,fatigue strength analysis and calculation of bolt connection work capacity for the railway refrigerated container cold storage device.The specific content is as follows:(1)From the design point of view,the three-dimensional model of the cold storage device was established using SOLIDWORKS software,and based on the three-dimensional model data,a reasonable simplification was carried out.The APDL language of ANSYS software was used to establish a finite element model of the cold storage device structure.The model is composed of beam elements and shell elements.(2)According to the requirements of relevant national regulations,design the impact load acting on the cold storage device structure and add the temperature load at the same time,calculate the stress cloud diagram and deformation of each component of the cold storage device in 10 working conditions,and check the static strength calculation results according to the requirements of the code.(3)According to the requirements of relevant national regulations,design the fatigue load acting on the cold storage device structure,calculate the fatigue strength of the cold storage device in 14 working conditions,and check the fatigue calculation results in combination with the requirements of the code.(4)In order to verify the working capacity of the structural bolt connection of the cold storage device,when the finite element model is established,the bolt connection is reasonably simplified to facilitate the extraction of bolt force data.In accordance with the requirements of the specification,the formula calculation function of EXCEL software is used to establish a universal bolt calculation template,which is used to complete the bolt check of the cold storage device structure,and the calculation efficiency is significantly improved.The analysis method of this article has certain reference value for the analysis and calculation of similar structures.