Free vibration analysis of BCCZ lattice sandwich beam structure manufactured with additives
ZHANG Wukun1,2, TAN Yonghua3, GAO Yushan1,2, WANG Jun1,2, ZHAO Jian1, GENG Xiaoliang4
1. Xi’an Aerospace Power Research Institute, Xi’an 710100, China;
2. National Key Lab of Science and Technology on Liquid Rocket Engines, Xi’an Aerospace Power Research Institute, Xi’an 710100, China;
3. Academy of Aerospace Propulsion Technology, Xi’an 710100, China;
4. School of Mechanics , Civil Engincering and Architecture, Northwestern Polytechnical University, Xi’an 710072, China
Abstract：The vibration behavior of a cantilevered sandwich beam with BCCZ (boundary of BCC lattice added with bar in Z direction) lattice sandwich structures was studied by theoretical, numerical and experimental methods. The equivalent shear modulus of BCCZ lattice under constraint boundary was used to obtain the nature frequency based on the "improved fold-line" deformation theory and Hamilton principles. The BCCZ lattice specimen was fabricated by selective laser melting (SLM) and TC4. Modal test experiments were also carried out to verify the accuracy of the theoretical model and finite element model. The structural geometric parameters, such as cell diameter, panel thickness and core height, and the influence of materials on the vibration properties of BCCZ lattice structures were studied as well. The results show that the 1st frequency parameters (the ratio of the 1st frequency to the solid structure with the same mass and panel area) of BCCZ lattice sandwich beam can be improved by reducing the cell diameter, reducing the panel thickness and increasing the core height. The effect of cell diameter is the most obvious. The 1st frequency is the highest when the material combination of panel-core-panel is Ti-Al-Ti. This paper will be useful for the design and engineering applications of BCCZ lattice sandwich.
收稿日期: 2022-05-16
出版日期: 2023-01-15
引用本文:
张武昆1,2，谭永华3，高玉闪1,2，王珺1,2，赵剑1,耿小亮4. 增材制造BCCZ点阵夹芯梁结构的自由振动分析[J]. 振动与冲击, 2023, 42(1): 318-325.
ZHANG Wukun1,2, TAN Yonghua3, GAO Yushan1,2, WANG Jun1,2, ZHAO Jian1, GENG Xiaoliang4. Free vibration analysis of BCCZ lattice sandwich beam structure manufactured with additives. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(1): 318-325.
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