Thermal-vibration response performance of titanium alloy acoustic liner for aero-engine
For the problem of dynamic response and fatigue failure of titanium alloy acoustic liner under high temperature vibration environment,the vibration characteristics of titanium alloy acoustic liner under high temperature environment were studied by combing simulation analysis and test.The results showed that the calculation results of first-order natural frequency of titanium alloy acoustic liner at 200℃were in good agreement with the test values,and the error was within 8％.Under 40g vibration environment,by comparing the simulation results with the test results,it was found that the error of the velocity response was within 26％,verifying the reliability of the numerical simulation.Using this numerical method,the stress distribution of the acoustic liner under the thermal vibration environment was calculated,and it was found that the maximum stress of the acoustic liner appeared on the honeycomb core,while the overall stress level of the panel was relatively low.With the increase of the height and thickness of the honeycomb core,the stress level of the acoustic liner decreased,while the stress level of the acoustic liner increased with the increasing thickness of the panel,and the influence of the size of the aperture on the strength of the acoustic liner can be ignored.
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