【摘要】 基于植物茎秆微观结构的生物仿生,建立纵向加肋多层圆柱壳模型,采用有限法计算了植物茎秆在轴压、弯曲、扭转和风荷载等各种荷载作用下的弹性屈曲和后屈曲行为,并与相同材料的等质量单层圆柱壳模型的计算结果作了比较,发现其抗屈曲/倒伏能力明显高于后者。更多还原

【Abstract】 Based on the microstructure of a hollow plant stem,a stringer stiffened multi-walled shell model was proposed for the bionic simulations.The elastic buckling and postbuckling analysis was presented for the plant stems subjected to axial compression,bending,torsion and wind pressure by using finite element method.The numerical results were compared with those of a single-walled shell model of equal mass.They show that the buckling resistance/lodging resistance of the plant stem by a multi-walled shell model is stronger than that by a single-walled shell model.更多还原