Lattice structures and thin-walled tubes are two types of energy-absorbers widely studied and applied in engineering practice. In this study, a new type of lattice-structure filled thin-walled tube (LFT) was proposed. In this new type of LFT, a BCC-Z lattice structure was filled into a square thin-walled tube. Then using data mining, a 3-D geometric design with five design variables was conducted on this new LFT. Using Latin Hypercubic sampling algorithm, 150 design cases were generated. Numerical models were then developed to simulate their crush behavior, and the simulation dataset was used for data mining. The results showed that (1) Filling the BBC-Z lattice structure into a thin-walled tube can significantly improve the energy absorption (EA) capacity of the structure. (2) The decision trees generated in the data mining process indicated that the rod diameter d of lattice structure is the key design variable that has most significant impact on EA, followed by m and n. (3) The design rules to build LFTs with high EA efficiency (SEA>=16 kJ/kg and CFE>=45%), high total EA (SEA>=16 kJ/kg and EA>=6 kJ), and lightweight (SEA>=16 kJ/kg and Mass<=0.45 kg) were obtained from decision trees. The ideal configurations of LFT corresponding to these three objectives are: d>2 mm, n>2 and m>3 for high EA efficiency; d>2 mm, n>2 and m>3 for high total EA; and d>2 mm, n>2, m<=4 and t<=1.7 mm for lightweight.

翻译：在工程实践中广泛研究并应用了两种类型的能源缓冲器和薄壁管。在本研究中,提出了一种新型的液压结构装满薄壁管(LFT) 。在这种新型的LFT中,一个BCC-Z衬托结构被填入一个薄壁的平方管。随后,利用数据挖掘,在这一新LFT上进行了具有五个设计变量的三维几何设计。使用拉丁超立方取样算法,产生了150个设计案例。随后开发了数字模型模拟其压碎行为,并使用模拟数据集来进行数据挖掘。结果显示:(1) 将BBC-Z衬托结构填入薄壁管(LFT),可以大大提高结构的能量吸收能力。 (2) 数据开采过程中产生的决定树表明,用棒直径d是关键设计变量,对EA影响最大,随后是m和n.(3) 以高效率(SEA+2+2KJ+KQQ+KKKK) 和CFSA+K决定的总效率设计规则(SEA+16 和KKKKKKKA+K),这些决定的总和KSEA+KK+K+KK/CFSA+K)。