单摆激振系统频响特性分析  

Frequency Characteristic Analysis of a Swing-ball Transient-exciting System

作　　者：张皓[1] 王敏庆[1] 闫孝伟[1] 贺晨[1] 贺译贤[1] 

机构地区：[1]西北工业大学航海学院,西安710072

出　　处：《机械科学与技术》2010年第3期383-386,共4页Mechanical Science and Technology for Aerospace Engineering

摘　　要：为实现中小型结构的可靠激励,笔者在球-板碰撞模型基础上设计了单摆激振系统,通过理论及仿真分析方法进一步分析了系统各参数对结构频响特性的影响,并通过实验验证了该方案的可行性。分析了水下环境对系统激振频响特性的影响。理论和实验结果表明:该激振方法简单可靠,可操作性强,能够激起实验要求的宽频带范围并达到计算要求的信噪比。To realize excitation for small and middle structures, the swing-ball transient-exciting system is designed on the basis of impacting model of bali-plate. Theoretic and simulation analysis is done for the parameters＇ effect on the frequency characteristic of this system. Then the feasibility is verified by experiments in which the water＇ s effect was considered. Results indicate that this system requires fewer equipments and has good maneuverability while enough frequency-bandwidth for experiment and S/N ratio for calculation is achieved.

关 键 词：水下冲击 球-板碰撞 振动测试 频率响应 信噪比 

分 类 号：TB532.4[理学—物理] O327[理学—声学]