Analysis And Application Of The Sound Pressure Measurement Of Blades

There are two methods of solving the problem of vibrantion in enguneering.First,through mathematical analysis,wo can obtained the mode characteristics (natural frequencies,mode quality, mode damping, etc.)in the free vibration, and exciting force in thecorresponding obtained under forced vibration response. Another method is experimentalmethods, it is a way to reverse the process. Mainly through some incentive, experiments havecertain vibration response, then wo can measured incentive force and vibration characteristicsof the corresponding directly by Vibration machines.Then obtained the mode characteristicsof system by analog signal analysis or digital signal analysis.This paper analyzes the problem when we measure the organs with little quality or littlerigidity. Currently, the most frequently used is the acceleration sensor.In measurement,wepasted acceleration sensors on the detected objects.Then it will add additional quality orrigidity, and impact on the measurement results. Measure the blades of the axial-flow farmerthrough the application of acoustic sensor and acceleration sensor, wo can know that acousticsensor measurement results will be closer to the theoretical results.In this paper, we analysis the blades of the axial-flow fanner.And simulate themicrophone positioned on the measurement results by sysnoise software. Come to the resultsthat the date near the obverse sulfate are more stable and the average.We know that the acoustic sensor have feasibility and advantages on the measuring theorgans with little quality or little rigidity through the numerical and experimental analysis ofthe results. Its has very broad prospects for application.