气浮台-复合材料层合板多体系统的刚-柔耦合动力学研究

Rigid-flexible coupling dynamics of air-bearing test bed-composite laminate multi-body system

基于非线性应变和位移关系,忽略横向剪切变形,用绝对节点坐标法建立了大变形复合材料层合板几何非线性动力学模型。在此基础上,综合考虑层合板风阻和气浮台风阻的影响,建立了气浮台-复合材料层合板多体系统的刚-柔耦合动力学模型。为了真实反映物体之间的约束关系,将气浮台和层合板之间的约束表示为面与面的固定约束。在单轴气浮台动力学仿真实验平台上进行了带有角位移驱动的复合材料层合板大变形刚-柔耦合动力学实验,验证了理论模型的正确性。比较了传统的点固定约束与面固定约束的计算结果差异,阐明了面固定约束的合理性。此外,分析了层合板风阻和气浮台风阻对仿真结果的影响,说明了考虑层合板风阻的必要性。

Based on the nonlinear relationship between strain and displacement, the geometric nonlinear dynamic model of large deformation composite laminates is established by using absolute nodal coordinate method with ignoring the transverse shear deformation. On this basis, considering the impact of the wind resistance of both the laminate and the air-bearing test bed, the air-bearing test bed-composite laminate of rigid-flexible coupling multi-body dynamic system model is established. In order to reflect the constraint relations between the objects, the constraints between the air bearing test bed and the laminate is ex-pressed as the fixed surface-surface constraint. In the single axis air-bearing test bed, the rigid-flexible coupling dynamic exper-iment of the composite laminate with angular displacement drive is carried out, which verifies the correctness of the theoretical model. The difference between the traditional point fixed constraint and the surface fixed constraint proposed in this paper is analyzed, and the validity of the surface fixed constraint is illustrated. In addition, the impact of the wind resistance of both the laminate and the air-bearing test bed is analyzed, and the necessity of considering wind resistance of laminate is illustrated.