摘要
基于金属圆管移动塑性铰理论,建立一种考虑偏心率效应和相互作用效应的泡沫铝填充圆管轴向冲击移动塑性铰分析模型,利用LS-DYNA软件对填充结构进行冲击仿真试验。结果表明,移动塑性铰模型和静态塑性铰模型相比,移动塑性铰模型计算的理论结果与仿真结果具有更好的一致性。泡沫铝填充圆管的平均压溃载荷与偏心率m有关,m存在最优值,冲击速度越大,m的最优值也越大。受轴向冲击载荷压溃时,泡沫铝与圆管之间存在明显的相互作用效应,在分析吸能特性时应加以考虑。
A moving hinge analytical model for aluminum-foam filled cylindrical tubes subjected to axial impact was developed. This model considered the eccentricity effect of the load and the interaction effect between the foam filling and the tube wall. An impact simulation experiment of the foam-filled tube was carried out using LS-DYNA software. Results indicate that the analytical solutions of the moving hinge model agree even better with the numerical results than those of the static hinge model. The average crushing load of the aluminum-foam filled cylindrical tube is relevant to the eccentricity m, which has a optimal value. As impact velocity increases, the optimal value of m increases also, When the tube crushes under axial impact load, the interaction effect between the aluminum-foam and the tube can be apparently observed. Thus, this interaction effect should be considered in analyzing the energy-absorption properties of the tube.
出处
《噪声与振动控制》
CSCD
北大核心
2008年第6期161-164,170,共5页
Noise and Vibration Control
基金
海军十一五预研项目(1010503020206)
关键词
振动与波
泡沫铝填充圆管
移动塑性铰模型
偏心率
相互作用
轴向冲击
能量吸收
vibration and wave
aluminum-foam filled cylindrical tube
moving hinge model
eccentricity
interaction effect
axial impact
energy-absorption
