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为了研究扰动影响下框式结构中的功率流传播与主动控制,首先采用波动方法建立了框式结构的动力学模型并获得了其在扰动下的精确动力学响应,进一步得到结构中传播的功率流,并以此为目标函数,优化得到了最优控制力的大小与相位,然后对结构施加最优控制力,实现了框式结构的功率流主动控制.对框式结构功率流主动控制方法进行了数值计算分析与实验验证.结果表明:采用波动方法计算框式结构的动力学响应精确可靠;通过数值计算与实验研究可知功率流主动控制可以明显降低框式结构全频域内的抖动,验证了基于波动方法功率流主动控制的正确性与有效性.
In order to study the power flow propagation and active control in the frame-type structure under the influence of disturbance, the dynamic model of the frame structure is first established by the wave method and its exact dynamic response under disturbance is obtained, and further the power transmitted in the structure Flow and as the objective function, the size and phase of the optimal control force are optimized, and then the optimal control force is applied to the structure to realize the active control of the power flow in the frame structure. The results show that the dynamic response of the box structure is calculated accurately by the wave method. Numerical calculation and experimental study show that the active power flow control can significantly reduce the jitter in the whole frequency range of the box structure, Correctness and validity of active power flow control based on wave method.