热–声–振耦合效应对薄壁叶片结构应变影响的试验研究

Experimental study of the effect of thermal-acoustics-vibration coupling on the strain of thin-blade structure

热-声-振耦合是影响叶片、太阳电池阵、天线、导弹等航空航天产品可靠性和耐久性的重要因素之一.文章设计了可模拟热-声-振耦合作用的试验装置,搭建热、声、振、应变测试系统,针对薄壁叶片结构进行热、声、振单独作用及耦合作用试验,基于应变数据定量分析热-声-振耦合效应及其特点,得出耦合效应对产品造成的影响远远大于单一因素作用的结果.研究结果还可为薄壁叶片结构航空航天产品多应力耦合效应分析提供参考.

The thermal-acoustics-vibration coupling is an important factor affecting the reliability and the durability of aerospace products such as the blade,the solar wing,the antenna,and the missile.A test facility is designed for simulating the thermal-acoustics-vibration coupling with measurements of the temperature,the sound pressure level,the vibration magnitude,and the strain of the thin-blade structure.The seperate acoustic,vibration,and thermal-vibration tests are carried out on a blade sample,followed by the coupling tests.The coupling test results are analyzed based on the strain data.It is found that the joint action of the thermal-acoustics-vibration stress induces a strain greater than that induced by any single factor would bring about,while less than the sum of those induced by all seperate factors.The result can provide a reference for investigating the multi-stress coupling on the aerospace products with thin-blade structures.