芯体截面梯度变化的点阵夹层结构吸能特性研究

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摘要本文应用有限元分析方法，对芯杆直径沿点阵夹层结构厚度方向梯度变化的点阵夹层结构平压性能进行了分析，并将计算结果与传统点阵夹层结构进行了对比。结果表明：通过比较极限承载力计算模型和有限元分析结果其最大误差为8.9%，芯体截面梯度变化的点阵夹层结构极限承载力小于传统点阵夹层结构。芯体截面梯度变化的点阵夹层结构面比吸能和圧溃载荷率要优于传统点阵夹层结构，且当梯度化系数为0.05时，芯体截面梯度变化的点阵夹层结构面比吸能和圧溃载荷率达到最大值。

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	朱凌雪1
	朱晓磊2

关键词 ：芯体截面梯度变化点阵夹层结构, 点阵夹层结构, 吸能特性, 压缩载荷

Abstract：The finite element method was utilized to analyse the compression properties of lattice truss structureswith graded crosssection core member (LTSGCC). Taking a certain lattice core sandwich as an example, the diameter of its core member is gradientvarying along the thickness. The calculation results were compared with those of the traditional lattice core sandwich (TLS). A prediction model was also used to calculate the first peak value of the LTSGCC, the maximum error is 8.9%, when comparing with the FEM results. The first peak value of the LTSGCC is smaller than that of the TLS. Meanwhile, the specific energy absorption (SEA) of the LTSGCC is larger than that of the TLS, and reaches the maximum, when the gradient coefficient is 0.05.

Key words： lattice truss structures with graded cross-section of core member lattice truss energy absorption compressive loading

收稿日期: 2017-03-16 出版日期: 2018-07-15

引用本文:

朱凌雪1，朱晓磊2 . 芯体截面梯度变化的点阵夹层结构吸能特性研究[J]. 振动与冲击, 2018, 37(14): 115-121.
ZHU Lingxue1，ZHU Xiaolei2. Energy absorption characteristics of lattice truss structureswith graded cross section core member. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(14): 115-121.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2018/V37/I14/115

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