摘要
为有效缓解冲击地压对液压支架的破坏作用,基于单层变径式吸能构件研究基础,提出了一种具有更高吸能量的双层变径式吸能构件。基于能量法剖析了不同截面管件扩径与缩径变形的能量耗散理论,推导了波纹管与圆管不同组合形式下构件稳定变径过程的承载力计算公式;通过数值模拟得到了8种不同类型吸能构件的吸能量曲线、承载力曲线及变形规律,对比发现,内层波纹管、外层圆管的双层变径式吸能构件结构(SBY类型)具备较优的吸能性能;探究了不同结构参数对吸能效果的影响规律,其中,内管壁厚、外管壁厚、波纹半径和底座内倒角4种结构参数对吸能特性参数影响显著。根据拉丁超立方取样方法设计试验方案,利用Kriging代理模型,结合多目标粒子群优化算法对结构参数进行优化,最终选择优化后的结构参数组合为内管壁厚6.0 mm、外管壁厚2.9 mm、波纹半径6.9 mm、底座内倒角40°。据此,制作了吸能构件并进行了轴向准静态加压实验,验证了数值模拟分析及优化结果的准确性和有效性。结果表明:经参数优化后的双层变径式吸能构件的总吸能提高了54.2%,比吸能提高了55.6%,平均承载力提高了43.2%,载荷标准差提高了59.5%。所设计的构件具有更好的吸能性能,让位防冲过程更加可靠。本研究可为深部巷道支护液压支架的吸能构件设计提供理论依据和参考。
In order to effectively mitigate the destructive effects of impact ground pressure on hydraulic supports,a double-layer variable-diameter energy-absorbing component with enhanced energy absorption was proposed based on previous research on single-layer variable-diameter structures.Using the energy method,the energy dissipation theory of the expansion and reduction deformation of tubular components with different cross-sections was analyzed,and the bearing capacity formulas for stable diameter reduction processes under various combinations of corrugated and circular tubes were derived.Through numerical simulations,the energy absorption curves,bearing capacity curves,and deformation patterns of eight types of energy-absorbing components were obtained.Comparative analysis revealed that the double-layer variable-diameter energy-absorbing component structure(SBY-type),consisting of an inner corrugated tube and an outer circular tube,exhibited superior energy absorption performance.The influence of key structural parameters on the energy absorption characteristics was further investigated.Among these,inner tube thickness,outer tube thickness,corrugation radius,and inner chamfer angle of the base were found to have the most significant effects.A Latin hypercube sampling scheme was designed,and the parameters were optimized using a Kriging surrogate model coupled with a multi-objective particle swarm optimization algorithm.The optimal parameter combination was determined as follows:inner tube thickness of 6.0 mm,outer tube thickness of 2.9 mm,corrugation radius of 6.9 mm,and base chamfer angle of 40°.Subsequently,axial quasi-static compression tests were conducted to verify the accuracy and effectiveness of the numerical and optimization results.The results indicate that,the total energy absorption of the double-layer variablediameter energy-absorbing component increased by 54.2%,the specific energy absorption increased by 55.6%,the average bearing capacity increased by 43.2%,and the load standard deviation increased by 59.5%.These enhancements demonstrate that the optimized component exhibits superior and more stable energy absorption performance,thereby improving the reliability of the yielding anti-impact process.This study provides an important theoretical basis and design reference for developing energy-absorbing components in hydraulic supports for deep roadway reinforcement.
作者
蒲志新
韩瑞夫
白杨溪
董成
廉嘉鹏
PU Zhixin;HAN Ruifu;BAI Yangxi;DONG Cheng;LIAN Jiapeng(College of Mechanical Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,China;Anshan Iron and Steel Group Co.,Ltd.,Anshan 114009,Liaoning,China)
出处
《高压物理学报》
北大核心
2026年第3期76-92,共17页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(52204215)。
关键词
防冲支架
双层变径构件
能量吸收
参数优化
波纹管
anti-impact bracket
double-layer variable-diameter component
energy absorption
parameter optimization
bellows
