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介绍一种改进的热模态试验方法,采用振动台基础激励技术和激光测振仪非接触测量方法,对舵面的热模态特性进行测试,获得了一阶弯曲频率和扭转频率随加热时间和温度的变化规律,该技术具有较好的应用价值。
An improved thermal modal test method is introduced. The thermal modal characteristics of the rudder surface are tested by vibration table based excitation technique and laser vibrometer non-contact measurement method. The first-order bending frequency and torsional frequency are obtained with the heating time And temperature changes, the technology has good application value.