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当研究—连续结构上点与点间的振动传输时,单靠测量传递函数尚不足于提供的足够的信息以确定传递途径,并采取有效措施以改善振动控制,因此近年来开始致力于功率流的研究.功率流方法的主要优点是:它同时考虑到了传到结构上的力和速度两个量值.因而也就考虑到了结构的阻抗特性;功率是一个单一的量值,它能给出振动传输的一种绝对度量.并可用常规仪器进行测量:它能清楚地指明哪一台机器、以至哪一个支承点对结构注入了最大的振动功率;最后,根据振动系统的动力特性可以预估振动功率流的传输.因为振动控制的方法是多种多样的,但如用功率流的概念来进行解
When studying the vibration transmission between point and point on a continuous structure, measurement of the transfer function alone is not enough to provide sufficient information to determine the transmission path and take effective measures to improve the vibration control. Therefore, in recent years, efforts have been devoted to power flow The main advantage of the power flow method is that it takes into account both the forces and velocities transmitted to the structure at the same time and thus takes into account the impedance characteristics of the structure and the power is a single magnitude that gives An absolute measure of vibration transmission and can be measured with conventional instrumentation: it clearly indicates which machine, to which support point, injects the maximum vibration power into the structure; and finally, based on the dynamic behavior of the vibration system, it can be estimated Vibration power flow transmission. Because vibration control methods are varied, but as the concept of power flow solution