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泡沫填充的薄壁结构的优点是质量轻和高吸能性能,广泛地应用于汽车、航空、运输和防护等行业。采用拟静力试验,分析空心和泡沫填充的端部封闭的锥形筒的耐撞性能,采用非线性动力有限元模拟拟静力试验,数值分析的抗冲撞力与试验数据很吻合。对未填充的锥形筒和填充的锥形筒的耗能能力进行对比,结果显示,泡沫填充的锥形筒的耗能能力比较好。最后,比较了空心、泡沫填充端部封闭的锥形筒和圆筒的耐撞性。
Foam-filled thin-walled structures have the advantages of light weight and high energy absorption and are widely used in the automotive, aerospace, transportation and defense industries. The quasi-static test was used to analyze the crashworthiness of the closed-ended hollow cone and foam-filled cone. The nonlinear dynamic finite element simulation was used to simulate the quasi-static test, and the numerical analysis of the anti-collision force was in good agreement with the experimental data. The energy consumption of unfilled conical tubes and filled conical tubes is compared. The results show that foam-filled conical tubes have better energy dissipation capacity. Finally, the crashworthiness of a hollow, bubble-filled cone and cylinder with closed ends was compared.