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本文提出了用最大熵谱法(MEM)求瞬态多自由度结构振动(如爆炸、冲击等)信号阻尼比的新方法,该方法能把瞬态多自由度结构振动信号用MEM法的一次计算求得多个模态的阻尼比。文内介绍了用MEM法求阻尼比的理论引计算方法,给出了仿真计算与实际应用于房屋结构控制爆炸信号和油罐振功信号阻尼比计算的结果。在文中还探讨了最大熵谱值的可靠性问题,通过计算证明,MEM法的谱值是具有一种相对准确的特殊规律性,用于计算瞬态信号的阻尼和传递率等有其显著的优点。
In this paper, we propose a new method to find out the damping ratio of the vibration of the transient multi-degree-of-freedom structure (such as explosion, impact and so on) by maximum entropy spectrum method (MEM) Calculate the damping ratio of multiple modal. In this paper, the theoretical censoring method of calculating the damping ratio by MEM method is introduced. The results of simulation calculation and calculation of dash-ratio of vibrating power signal of tank structure and control system are given. The reliability of the maximum entropy spectrum is also discussed in this paper. It is proved by calculation that the spectral value of the MEM method has a relatively accurate regularity. For the calculation of damping and transmissibility of transient signals, advantage.