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采用双悬臂梁试件,通过基础激励下的共振驻留法,开发了一套高温材料在真空环境下的阻尼测试系统。研究了提高测试精度的方法,并分析了空气阻尼对阻尼测试结果的影响,并以Ti-6-4合金为对象,研究了阻尼随温度、应变幅值及振动频率的变化规律。
A dual-cantilever beam specimen was used to develop a damping test system of high-temperature materials in a vacuum environment by resonance-based resonance method. The method to improve the test accuracy is studied. The influence of air damping on the damping test results is analyzed. The variation of damping with temperature, strain amplitude and vibration frequency is studied with Ti-6-4 alloy.