Design And Research Of Urban Safety Emergency Evacuation Device

This paper takes the urban safety emergency evacuation device as the research object,draws on the design and research ideas of the mine safety emergency evacuation device,design and research of the cabin structure from the aspects of pressure resistance,shock resistance,impact resistance,explosion resistance and thermal protection,etc,and at the same time,design the overall structure of the door of the evacuation device.Through various modules in the ANSYS Workbench Environment(AWE),the simulation of the cabin structure was performed to verify the rationality and reliability of the cabin structure of the designed safety evacuation device.Through each module in the ANSYS Workbench Environment(AWE),the simulation of the cabin structure was carried out,and the rationality and reliability of the designed cabin structure of the safety evacuation device were verified.This paper focuses on the following aspects:(1)The overall structure of the urban emergency evacuation device is designed: referring to the design ideas of the mine safety emergency evacuation device and taking into consideration the working environment factors of the urban safety emergency evacuation device,a new type of urban safety emergency evacuation device with a honeycomb structure is proposed;on the basis of the existing safety emergency evacuation device doors,the door was innovatively designed,and a safety door with a bevel gear linkage was designed.(2)The structural statics analysis of the cabins of the urban safety emergency evacuation device was carried out: in the SpaceClaim software,the cabin structure(ie,honeycomb structure)of the newly designed safe emergency evacuation device is modeled;by using the “Static Structural” analysis module in ANSYS Workbench software,the deformation and stress and strain distribution of the safe emergency evacuation device under simulated external loads are simulated,and the strength and stiffness of the cabin of the safety emergency evacuation device were tested to meet the design requirements.(3)The structural optimization of the cabin of the urban emergency evacuation device was analyzed: the multi-objective optimization design of the cabin structure was carried out by utilizing the method of collaborative optimization between SpaceClaim and ANSYS Workbench Environment(AWE);by the response surface relationships between design variables and objective functions,the main factors affecting the mass of the cabin structure,the maximum equivalent stress and the maximum total deformation are obtained;through the DOE optimization method,the optimal solution of the honeycomb structure of the honeycomb is found out.(4)The modal analysis of the cabin of the urban emergency emergency shelter device was performed: by using the "Modal" analysis module in the ANSYS Workbench finite element software,the first twelve natural frequencies and the first twelve modes of total deformation analysis(the vibration pattern)of the optimized honeycomb structure are obtained,and the dangerous frequencies and the locations of serious deformations of the honeycomb structure were found,so that the structural design avoided resonance.(5)The seismic analysis of the cabins of the urban safety emergency evacuation device was carried out: through the “Transient Structural” analysis module in the finite element software,the dynamic response of the cabin structure of the urban safety emergency evacuation device under seismic load was simulated.The maximum total acceleration curve,the maximum total deformation curve and the maximum stress curve of the cabin at various times were obtained,and the maximum total acceleration,the maximum total deformation and the maximum stress of the cabin during the entire analysis process were found.this honeycomb structure was verified to meet the seismic application requirements.(6)The analysis of impact resistance of the cabins of urban safety emergency evacuation devices was performed: the problem of dropping heavy objects to impact the structure of the cabins and the problem of the collision of the cabins with the ground is converted to a Low acceleration collision problem;in the SpaceClaim software,an optimized simulation model of the low-speed collision between the cabin structure(ie the honeycomb structure)and the rigid wall is established,and the simulation model of the low-speed collision between the cabin structure and the rigid ground is established;through the “Explicit Dynamics” analysis module in the finite element software,the pre-processing settings,solution and post-processing were carried out,and the total deformation and equivalent stress of the cabin structure of the safe emergency evacuation device were obtained;the changes in the total deformation and equivalent stress of the cabin structure of the safety emergency evacuation device were obtained,the rationality of the similar honeycomb cabin was verified,and the recommendations for strengthening the strength and stiffness of the cabin structure were proposed.(7)The The anti-knock shock analysis was performed on the cabins of the urban safety emergency evacuation device: by using the “Autodyn” analysis module in the finite element software,it simulates the explosion of a certain amount of TNT in a single room;the propagation law of the shock wave generated by the explosion in the room was determined,and the pressure cloud diagram in a single room at various times and the explosion pressure curve at different locations in a single room were obtained;through the "Transient Structural" analysis module in the finite element software,the stress and deformation of the similar honeycomb cabin under the pressure curve load are simulated;the places where the stress and deformation are greatest are found,and the cabin of the urban safety emergency evacuation device was verified to meet the anti-knock impact performance requirements.(8)The thermal protection performance of the cabin of the urban emergency evacuation device was analyzed: a transient thermal analysis of the cabin of the safe emergency evacuation device was performed using the "Transient Thermal" analysis module in the finite element software: under the two boundary conditions that are far from the fire source and near the fire source,simulate the heat transfer law of each layer of the similar honeycomb cabin;the temperature change cloud diagrams and temperature curves of each layer of the similar honeycomb cabin at each time were obtained in two cases;at the same time,the comprehensive finishing of the analysis results under the two boundary conditions were carried out,and the thermal protection capability of the cabin of the safe emergency evacuation device was verified to meet the requirements for use.This paper analyzes and studies the pressure resistance,seismic resistance,impact resistance,explosion resistance,and thermal protection of the urban emergency evacuation device;the equivalent stress cloud diagram and total deformation cloud diagram of the cabin were obtained when the emergency evacuation device for urban safety was in different emergencies(such as earthquakes,fires,etc.);the reliability of the urban safety emergency evacuation device structure designed in this paper was verified;it provides a theoretical reference for the design and manufacture of urban emergency evacuation devices and has a strong scientific theoretical guidance.