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总览 评价 陈立明 * ， 杜冰 ， 杨洋 （ 重庆大学航空航天学院，非均质材料力学重庆市重点实验室，重庆 400030； ） 摘要： 点阵圆锥壳因其优异性能在航空航天领域中应用广泛，应用中除了满足强度刚度要求外，还必须满足基频要求避免共振，因此对点阵圆锥壳
陈立明*， 杜冰， 杨洋
（
重庆大学航空航天学院，非均质材料力学重庆市重点实验室，重庆 400030； ）
摘要：
点阵圆锥壳因其优异性能在航空航天领域中应用广泛，应用中除了满足强度刚度要求外，还必须满足基频要求避免共振，因此对点阵圆锥壳振动特性的研究具有重要意义。本文通过有限元方法深入研究了有无蒙皮对Kagome点阵圆锥壳振动特性的影响。首先在ABAQUS中建立了点阵夹芯圆柱壳的模型，与实验结果对比验证有限元计算正确性。建立点阵圆锥壳的有限元模型，得到了其在自由边界条件下的振型和频率，对比点阵夹芯圆锥壳、点阵加筋圆锥壳与点阵圆锥壳的振动特性，发现相同边界条件下，增加蒙皮能够提高点阵圆锥壳的基频，点阵夹芯圆锥壳的基频是点阵圆锥壳的近三倍。
关键词：
点阵圆锥壳；夹芯；加筋；自由振动；基频
CHEN Liming*， DU Bing， YANG Yang
（
Chongqing Key Laboratory of Heterogeneous Material Mechanics, College of Aerospace Engineering, Chongqing University, Chongqing 400030； ）
Abstract：
Lattice conical shells are widely used in aerospace engineering field due to their excellent properties. Apart from the requirements of strength and stiffness, the fundamental frequency of lattice conical shells applied are required to be satisfied. It is significant to study the vibration property of lattice conical shells. In this paper, the effect of skin on the vibration property of Kagome lattice conical shell was numerically investigated. Finite element (FE) model of lattice sandwich cylindrical shell was established in ABAQUS and the FE simulation was validated by comparing with the existing experimental results. FE simulation of lattice conical shell was also implemented to get the vibration mode and frequency. Comparison between lattice sandwich conical shell, lattice stiffened conical shell and lattice conical shell were conducted. It is shown that covering with skin can enhance the fundamental frequency of lattice conical shell in the same boundary conditions. Notably, the fundamental frequency of lattice sandwich conical shell is almost triple as high as that of lattice conical shell.
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