State-Vector Equation With Damping and Vibration Analysis of Laminates
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摘要: 基于考虑弹性体粘滞阻尼的修正后的Hellinger-Reissner (H-R)变分原理，推导了相应的状态向量方程．结合精细积分法和Muller法为四边简支矩形层合板的简谐振动分析提出了新的方法．依据线性阻尼振动理论，简要地给出了复合材料层合板欠阻尼、临界阻尼和过阻尼3种自由运动的通解公式．通过数值实例研究了粘滞阻尼对复合材料层合板振动的影响．丰富了状态向量方程的理论体系和应用领域．Abstract: Based on the modified mixed Hellinger-Reissner(H-R) variational principle for elastic bodies with damping,the state-vector equation was directionally derived from the principle.A new solution for the harmonic vibration of simply supported rectangular laminates with damping was proposed by using the precise integration method and Muller method.The general solutions for the free vibration of underdamping,critical damp and overdamping of composite laminates were given simply in terms of the linear damping vibration theory.The effect of viscous damping force on the vibration of composite laminates was investigated through numerical examples.The state-vector equation theory and its application areas are extended.
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Key words:
- laminated plates /
- damping /
- vibration /
- H-R variational theorem /
- state-vector equation
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