基于二维激光扫描的复合材料层合板热振试验装置研发与应用

研发了一套基于二维激光扫描测试装置的复合材料层合板热振试验装置。利用PLC控制器、触摸屏、滑台型导轨、步进电机、激振器、功率放大器、激光测振仪、加热及温控装置、振动控制仪及数据采集分析装置等,建立了满足层合板高温测振需求的硬件系统。基于PLC梯形图语言编写了二维激光扫描测试装置的控制软件,并详细介绍了手动、自动控制模块对应的操作界面与测控优势。以HF10碳纤维/树脂基层合板试件为例,对该装置进行了研究。结果表明:该装置可显著提高热环境下层合板结构模态振型的测试效率,且有利于研究不同温度对结构振动特性的影响。研究发现热环境对层合板固有频率和阻尼性能有着复杂影响,且随着温度的不断升高,模态阻尼比呈现减速增大的趋势。

Development and Application of Thermal Vibration Measuring Device for Composite Laminated Plates Based on Two-dimensional Laser Scanning

A thermal vibration experiment device for composite laminated plates based on the two dimensional laser scanning measuring device was developed. By using PLC controller, touch screen, guide rail, stepper motor, vibration exciter, power amplifier, laser vibrometer, heating and temperature control device, vibration controller and data acquisition and analysis device, the hardware system that met the requirement of high temperature vibration measurement of laminated plates was established. Based on PLC ladder diagram language, the control software of two dimensional laser scanning measuring device was programmed, and the corresponding operation interface and measurement and control advantages of the manual and automatic control modules were introduced in detail. Taking the HF10 carbon fiber/resin plate specimen as an example, the device was studied. The results show that this device can be used to significantly improve the measuring efficiency of laminated plate structure modal shapes in a thermal environment, and it is beneficial to study the influence of different temperature on the structure vibration characteristics. It is found that the thermal environment has a complex effect on the natural frequency and damping properties of laminated plate structures, with the increasing of temperature, the modal damping ratio increases, but the increasing trend slows down.