基于Labview的固定结合面动态特性参数测量

Measurement of joint surface dynamic parameters based on Labview

以振动理论为基础并以虚拟仪器软件Labview为开发平台,用分时快速稳态正弦扫频激振的测量方式建立了一套测试系统。以PC机为硬件载体,Labview软件为软件平台,配合其他相关设备以快速稳态正弦扫频激振的方式对试件进行实验测试,可以测得试件结构的频率响应函数曲线,进而计算出结构的固有频率和阻尼比等动态参数,用于结构动态参数的测量实验当中。通过与有限元理论分析的结果进行对比,证明本系统所测数据准确可靠,具有较高的理论意义和实践价值。

This paper built a test system based on vibration theory,used a virtual instrument software-Labview as platform,and through rapid timesteadystate sinusoidal excitation swept frequency response function measurement system and method. The measurement system can measure structural's frequency response curve by using PC platform and software Labview coordinating other equipment through rapid timesteadystate sinusoidal excitation swept frequency response function measurement system and method. Natural frequency and damping can be calculated through structural' s frequency response curve. It can be used in measuring structural dynamic parameters. By comparison with the finiteelement theoretical analysis,experiments show that the system can obtain accurate and reliable data,and have a high theoretical significance and practical value.