吉林大学学报(工学版) ›› 2019, Vol. 49 ›› Issue (3): 865-871.doi: 10.13229/j.cnki.jdxbgxb20180309
Xiao⁃qin ZHOU1(),Lu YANG1,Lei ZHANG1,Li⁃jun CHEN2()
摘要:
为探究铰接八面体结构的线压缩性与模型几何参数之间的内在关联,对该三维结构进行了有限元分析。在保证其他几何尺寸不变的前提下,通过改变杆长比l1/l2和杆件夹角θ1,建立了不同的有限元模型。具体讨论了杆长比和杆件夹角对该结构轴向线负压缩性(即NLC)大小和范围的影响。研究发现,通过合理地选择几何参数,该结构在3个轴线方向上均可存在线负压缩性,其中杆件夹角θ1的大小决定了线压缩性的正负,杆长比l1/l2的大小则决定了负压缩性的大小和存在范围。
中图分类号:
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