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在航空航天器、车辆、船舶、海洋工程、机床、动力机械、土建工程等结构系统的发展中,振动问题在分析、设计、使用过程中日益重要,结构动力特性的确定成为动态设计的核心环节。所谓模态分析就是用分析或试验的方法来确定结构系统的固有频率、阻尼系数和振型等模态参数的过程。广义的模态分析还包括试验与分析方法的结合。结构动力学修改,结构系统数学模型的建立,并用于分析系统的动力响应、稳定性以及振动控制。
In the development of structural systems such as aerospace vehicles, ships, marine engineering, machine tools, power machinery and civil engineering, the vibration problem is increasingly important in the process of analysis, design and use. The determination of structural dynamic characteristics becomes the core of dynamic design . The so-called modal analysis is the process of using analytical or experimental methods to determine the modal parameters such as the natural frequency, damping coefficient and mode shape of a structural system. Generalized modal analysis also includes a combination of experimental and analytical methods. Structural dynamics modification, the establishment of mathematical model of structural system, and used to analyze the system’s dynamic response, stability and vibration control.