Analysis and Optimization of Energy Absorption Characteristics of Concave Circular Tube Thin-Walled Component for Hydraulic Support
In order to effectively prevent and control coal mine rock burst and enhance the anti-impact performance of hydraulic column,a new type of energy absorbing and anti-impact component with concave angle circular tube was proposed.The effects of the number,diameter and thickness of concave angles on the energy absorption characteristics were analyzed by numerical simula-tion.Based on the response surface function,the ideal point method is used to compare the two indexes of energy absorption and load stability coefficient for multi-objective optimization.The results show that there are four kinds of stable deformation modes:tilt progressive deformation,progressive deformation,disordered extrusion deformation and mixed deformation.The tilt progressive deformation has the best energy absorption performance,while the progressive deformation has the worst energy absorption perfor-mance.When the ratio of diameter to thickness is large,the eccentricity of the component is small,and the tilt progressive deforma-tion mode occurs,and the load displacement curve fluctuates less,and the energy absorption characteristics are good.When the ra-tio of diameter to thickness is small,the eccentricity of the component is larger,the load and displacement curve of the component fluctuate greatly,and the energy absorption characteristics are poor.The optimization results show that the number of concave an-gles N=4,the wall thickness t=5.38mm and the radius R=83.28mm are the best energy-absorbing components,which increase by 17.80％and the load stability coefficient by 29.17％compared with the circular tube.
万方数据
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