正弦波纹管填充乳化液式吸能构件吸能特性研究

STUDY ON ENERGY ABSORPTION CHARACTERISTIC OF SINUSOIDAL BELLOWS FILLED EMULSION ABSORBER

预折纹式吸能构件是目前冲击地压矿井中唯一使用的吸能结构,具有优异的吸能特性,但在屈曲变形过程中存在载荷波动较大、由于摩擦的作用产生火花等问题。针对上述情况,设计了一种正弦波纹管(变径圆管)填充乳化液构成固液耦合体吸能构件(组合构件),研究了波纹管壁厚、母线振幅与出液口直径三个因素对吸能构件吸能特性的影响。建立平均载荷、载荷波动系数与比吸能的预测模型,利用Abaqus有限元软件的光滑粒子流体动力学(Smoothed Particle Hydrodynamics,SPH)粒子算法对模型进行流固耦合分析,通过响应面法对吸能构件的结构参数进行寻优并得到优化结果。研究结果表明,当波纹管壁厚3.959 mm,母线振幅3.721 mm,出液口直径22.161 mm时的吸能构件吸能特性最佳,平均载荷为438.684 kN,载荷波动系数为1.178,比吸能12.123 kJ/kg。通过对比验证,结果具有较高的可信度,为防冲支护装备的吸能环节提供了一种优越的吸能构件。

The pre⁃folded energy absorber is the only energy absorber structure used in rock burst mine at present.It has excellent energy absorption characteristics,but there are some problems in the buckling deformation process such as large load fluctuation and spark due to friction.In view of the above situation,a sinusoidal bellows(reduced diameter round pipe)filled with emulsion was designed to form a solid⁃liquid coupling body energy absorption component(composite component).The effects of three factors,namely wall thickness of the bellows,amplitude of the busbar and diameter of the liquid outlet,on the energy absorption characteristics of the energy absorption component were studied.The prediction model of average load,load fluctuation coefficient and specific energy absorption was established.The smoothed partiole hydrodynamics(SPH)particle algorithm of Abaqus finite element software was used for fluid⁃structure coupling analysis of the model.The structural parameters of energy absorption components were optimized by response surface method and the optimization results were obtained.The results show that when the wall thickness of corrugated pipe is 3.959 mm,the amplitude of busbar is 3.721 mm,and the diameter of outlet is 22.161 mm,the energy absorption characteristics of the member are the best.The average load is 438.684 kN,the load fluctuation coefficient is 1.178,and the specific energy absorption is 12.123 kJ/kg.Through comparison and verification,the results have high reliability,which provides a superior energy absorption component for the energy absorption link of anti⁃impact support equipment.