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不同加载条件下泡沫杆的冲击动力响应

Keywords: 泡沫,质量弹簧模型,冲击载荷,应力波传播

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Abstract:

基于一维非线性质量弹簧模型,研究了不同冲击加载条件下泡沫材料杆的冲击动力响应特性.在保证初始冲量相同的条件下,对比讨论了矩形载荷、正弦载荷、三角形载荷和倒三角载荷作用下泡沫杆内弹塑性应力波的传播过程,以及杆的动态变形特征.给出了不同载荷作用下的冲击应力增强因子和临界冲量.研究结果确定了不同冲击加载条件下泡沫材料的动力响应特征,对不同工况下泡沫结构的动力学性能设计具有重要的理论指导意义.

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