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一、绪言随着现代化机器的速度越来越高、性能要求越来越严格、结构越来越复杂,机器动态性能问题的研究在机械设计和制造中的地位也越来越重要。近年来经过调查研究发现,机器发生破坏或出故障的原因,很少是由于机器静态性能不好引起的,而多半是由于对机器动态性能考虑不周引起的。因此现代机械工程学中一个重要问题就是分析和预测机械系统的动态性能;而动态性能的一个主要表现形式就是振动。众所周知,机械工程中许多有重要意义的实际问题,如机床加工时的颤振、机器部件的动平衡、旋转轴的
I. INTRODUCTION With the speed of modern machines getting higher and higher, the performance requirements are more and more strict, the structure is more and more complex, and the research of machine dynamic performance problems is more and more important in the mechanical design and manufacture. In recent years, after investigation and study found that the cause of the machine damage or failure, rarely due to poor performance of the machine caused by static, but mostly due to poor consideration of the dynamics of the machine caused. Therefore, an important problem in modern mechanical engineering is to analyze and predict the dynamic performance of mechanical systems. One of the main manifestations of dynamic performance is vibration. As we all know, mechanical engineering, many of the important practical problems, such as machine tool flutter, the balance of the machine components, the axis of rotation