Aiming at the problems of instability and insufficient energy dissipation of traditional single-layer BCC lattice sandwich panels under extreme dynamic loads, a dynamic analysis model of a double-layer BCC lattice sandwich panel was proposed, which was aimed at revealing the vibration characteristics and improving the structural stiffness and damping performance. Based on three-dimensional elasticity theory and spectral geometry method, and by incorporating the modified homogenization equivalence principle and virtual spring boundary technology, the dynamic equations for double-layer BCC sandwich plates were established. The natural frequency and random vibration response expressions were derived via energy functional. Numerical examples validate the model's convergence, and comparisons with finite element results confirm its accuracy. Additionally, the effects of unit cell height, cell size, and rod diameter on the vibration characteristics were discussed to provide theoretical guidance for practical engineering applications.
WangXiangming, SuYadong, WuBin, et al. Application for additive manufacturing of lattice materials on integrated aircraft structures and functions[J]. Aeronautical Manufacturing Technology, 2018, 61(10): 16-25.
[3]
De FeliceA, SorrentinoS. In-plane vibration analysis of plates with periodic skeletal truss microstructures[J]. Mechanics of Advanced Materials and Structures, 2021, 28(14): 1451-1461.
[4]
LiuL, YangW, ChaiY, et al. Vibration and thermal buckling analyses of multi-span composite lattice sandwich beams[J]. Archive of Applied Mechanics, 2021, 91(6): 2601-2616.
HuangXina, ZhaiYuewen. Influence of unit cell size on mechanical properties of lattice structure[J]. Journal of Xi'an Jiaotong University, 2023, 57(6): 115-122.
DuYixian, LiHanzhao, TianQihua, et al. Topology optimization of periodic lattice structure with high shear strength using energy-based homogenization[J]. Journal of Mechanical Engineering, 2017, 53(18): 152-160.
ZhuJianfeng, DaiNing, LiuLele. Research on the design and optimization technology of functional lattice structure[J]. Machine Design and Manufacturing Engineering, 2020, 49(7): 1-6.
HouZhonghua, WangWensheng. Load-bearing performance and experimental study of modular floor mat panels' unit cell structure[J]. Science Technologyand Engineering, 2025, 25(32): 13670-13678.
JiangGuoqing, ChenWanhua, MaBin, et al. Buckling perfor-mance of honeycomb sandwich panels with typical pit defects under high-temperature environment[J]. Science Technology and Engineering, 2024, 24(14): 5797-5803.
[15]
ShangJ, WangK, YanD, et al. An analytical method for elastic modulus of the sandwich BCC lattice structure based on assumption of linear distribution[J]. Materials, 2023, 16(9): 3315.
[16]
YangY, ShanaM, ZhaoL, et al. Multiple strut-deformation patterns based analytical elastic modulus of sandwich BCC lattices[J]. Materials & Design, 2019, 181: 107916.
[17]
KohsakaK, UshijimaK, CantwellW J. Study on vibration cha-racteristics of sandwichbeam with BCC lattice core[J]. Materials Science and Engineering B: Advanced Functional Solid-State Materials, 2021, 264: 114986.
[18]
ChenJ W, LiuW, SuX Y. Vibration and buckling of truss core sandwich plates on an elastic foundation subjected to biaxial in-plane loads[J]. Computers Materials & Continua, 2011, 24(2): 163-181.
[19]
ChenJ E, ZhangW, LiuJ, et al. Dynamic properties of truss core sandwich plate with tetrahedral core[J]. Composite Structures, 2015, 134: 869-882.
[20]
LouJ, WuL, MaL, et al. Effects of local damage on vibration characteristics of composite pyramidal truss core sandwich structure[J]. Composites Part B: Engineering, 2014, 62: 73-87.
[21]
ChaiY, DuS, LiF, et al. Vibration characteristics of simply supported pyramidal lattice sandwich plates on elastic foundation: theory and experiments[J]. Thin-Walled Structures, 2021, 166: 108116.
[22]
ChaiY, LiF, SongZ, et al. Analysis and active control of nonlinear vibration of composite lattice sandwich plates[J]. Nonlinear Dynamics, 2020, 102(4): 2179-2203.
[23]
蒋存存. 基于多尺度有限元的点阵结构频率分析及拓扑优化[D]. 大连: 大连理工大学, 2021.
[24]
JiangCuncun. Frequency analysis and topology optimization of the lattice structures based on the multiscale finite element method[D]. Dalian: Dalian University of Technology, 2021.
ZhangRongguo, ShengDongfa, LiZhongjun, et al. Multiscale analysis of the mechanical properties of periodic composite mate-rials[J]. Science Technology and Engineering, 2022, 22(36): 15994-16000.
LiShaohua. Load-bearing and thermal insulation performance characterization and optimization design of periodic sandwich plates[D]. Wuhan: Huazhong University of Science and Technology, 2022.
[29]
LiM, DuS, LiF, et al. Vibration characteristics of novel multilayer sandwich beams: modelling, analysis and experimental validations[J]. Mechanical Systems and Signal Processing, 2020, 142: 106799.
HuangZhou, LeiYaxi, LiuYong, et al. Vibration characteristics analysis of BCC lattice sandwich circular plates under moving point loads[J]. Journal of Vibration Engineering, 2026.DOI: 10.16385/j.cnki.issn.1004-4523.202408023.
HuoHui, ChenGuohai, WangWenpei, et al. Benchmark solutions of random vibration responses for moderately thick cylindrical shells under stationary/nonstationary excitations[J]. Chinese Journal of Theoretical and Applied Mechanics, 2022, 54(3): 762-776.