【摘要】 用平面应力模型来模拟复合材料叠层梁,得到了正交各向异性叠层梁的频率和模态函数,并用间接模态叠加法(IMSM)求得了叠层梁的瞬态响应。针对正交各向异性单层梁,把研究结果与Timoshenko梁结果进行了的比较,说明了厚度效应对冲击响应的重要影响。对叠层梁受冲击过程中其内部的应力特征及波传播现象进行了分析。更多还原

【Abstract】 A composite laminated beam is considered to be in a state of plane stress,the analytical solutions of frequencies and modal functions of a composite orthogonal and anisotropic laminated beam with simply-supported boundary condition are obtained by elasticity theory.The indirect mode superposition method is applied to the determination of its impact responses.For a single layered orthogonal and anisotropic composite beam,its numerical results are compared with those of Timosienko beam theory,the comparisons show that the influence of thickness effects on impact response is very important.And the stress properties and the characteristics of wave propagation are analyzed in detail for composite laminated beam.更多还原