结构动力学基本概念理解与工程实践运用  

Understanding of Basic Concepts of Structural Dynamics and Application in Engineering Practice

作　　者：孙齐 Sun Qi(College of Ship,Sea and Energy,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学船海能动学院,武汉430063

出　　处：《动力学与控制学报》2024年第11期91-96,共6页Journal of Dynamics and Control

摘　　要：结构动力特性的相关理论与原理,被越来越广泛地应用于各个工程领域,但对其基本概念与基本原理的理解与掌握仍然需要进一步推进.一些基本概念看似很基础也很完善,但没有准确理解与掌握,便难以科学地运用到工程实践中.基于理论分析与推导证明对结构固有频率与圆频率,结构第1阶固有频率与基频,多自由度系统结构阻尼与模态阻尼比,固有频率在桥梁技术状态评估中的运用,Rayleigh商之注释等结构动力学中的常见问题进行了深入分析与辨析,明晰了一些基本概念,使结构动力学理论体系更为完备.The relevant theories and principles of structural dynamic characteristics are more and more widely used in various engineering fields,but the understanding and mastery of their basic concepts and principles still need to be further promoted.Some basic concepts seem to be very basic and perfect,but without accurate understanding and mastery,it is difficult to apply them to engineering practice scientifically.Based on theoretical analysis,some common problems in structural dynamics,such as structural natural frequency and circular frequency,structural first natural frequency and fundamental frequency,structural damping and modal damping ratio of multi-degree-of-freedom system,application of natural frequency in bridge technical state evaluation,Rayleigh quotient annotation and so on,are deeply analyzed and analyzed,and some basic concepts are clarified.It makes the theoretical system of structural dynamics more complete.

关 键 词：结构动力学 固有频率 模态分析 多自由度系统 结构阻尼 

分 类 号：U466.1[机械工程—车辆工程]