Research On Stress Detection Method Of Ship Shaft Based On Barkhausen Effect

In the course of ship operation,propeller is its power source,axial thrust of ship shafting is the main factor affecting propeller output power,and ship shafting stress is the main criterion for ship shaft damage detection.Therefore,stress detection of ship shafting in engineering application has always been a research hotspot of scholars at home and abroad.This paper has done the following work for the stress detection of ship shaft:1.Based on the Bakhausen noise technology,explore the excitation mode and sensing technology applicable to the ship shaft cylinder,use a separate power supply system and wireless transmission function to realize the construction and calibration of ship shafting stress detection system,and obtain the relationship between Barhausen signal and stress conditions.2.The Barkhausen signals under different excitation frequencies and amplitudes were detected by using the same excitation structure and the same material test block with the stress detection device under laboratory conditions,and the relationship between Barkhausen’s average jump volume and excitation conditions was verified.The formula of Barkhausen’s mean jump volume and the formula of Barkhausen’s signal detection voltage are explained theoretically.3.According to the actual material used in ship shafting,different material test blocks are selected in the laboratory to detect the influence of different material parameters on Barkhausen signal,and it is determined that the material surface roughness and material carbon content are the key factors affecting Barkhausen signal.4.According to Siebert Yellow transform,study the frequency domain distribution of Barkhausen signals generated by ferromagnetic materials,extract the frequency domain characteristics of Barkhausen signals,verify the difference in frequency range of MBA signals generated by different materials,and study the new eigenvalues applied in stress detection technology based on Barkhausen noise.Finally,the experiment of ship shafting stress detection system built in the laboratory shows that the proposed method achieves the purpose of real-time monitoring of ship shafting stress,meets the requirements of ship shafting monitoring,and provides a reference for stress detection in engineering.