一种动力吸振梁单元及其单元功能激活控制方法

A DVA-beam element and its function activation control method

针对动力吸振器-梁系统动力学建模与优化设计问题,提出一种动力吸振梁单元及其单元功能激活方法。通过动力吸振器-悬臂梁模型算例,将动力吸振梁单元模型数值计算结果与ADAMS刚柔耦合动力学模型仿真结果进行比较,对动力吸振梁单元建模方法有效性与准确性进行验证。结果表明:动力吸振梁单元只需较少数量的单元即可实现动力吸振器-梁系统动力响应准确计算。动力吸振梁单元功能激活参数a;∈[0.001,0.1]时,具备较好的计算精度与速度。动力吸振梁单元能够同时优化动力吸振器位置、质量、阻尼与刚度参数,可为动力吸振器-梁系统动力学建模与优化提供新方法。

A novel dynamic vibration absorber(DVA)-beam element and its function activation control method have been proposed for the dynamic modeling and optimal design of the DVA-beam system. A demonstrated DVA-cantilever beam model has been utilized to verify the effectiveness and accuracy of the DVA-beam element by comparing the dynamic responses computed from the DVA-beam element model and rigid flexible coupling dynamic model, respectively. Results reveal that the dynamic response of the DVA-beam system could be computed accurately by a few DVA-beam elements. The DVA-beam element model could achieve a balance between the computing accuracy and speed when a;∈[0.001,0.1]. The position, mass, damping and stiffness parameters of the DVA could be optimized by the DVA-beam element model simultaneously. The DVA-beam element can provide a new approach for the dynamic modeling and optimization of the DVA-beam system.