本文選題：空間脈沖響應 + 斜楔塊　； 參考：《振動與沖擊》2017年06期

【摘要】：各種大型軸類零件形狀復雜,體積和質(zhì)量大,拆卸困難,主要用小角度縱波探頭在軸端面實施探傷。小角度縱波超聲檢測方法在工業(yè)中有著大量的應用,對于小角度縱波探頭的聲場研究還較少。以空間脈沖響應為理論基礎,根據(jù)界面條件下的波形轉(zhuǎn)換以及超聲波的透射規(guī)律,建立了小角度縱波超聲探頭在斜楔塊條件下的空間聲壓模型,給出了其空間脈沖響應的計算公式,并仿真得到了不同斜楔塊角度時介質(zhì)中的聲壓分布圖,利用半圓階梯試塊測試了聲軸線的聲壓和指向性圖,實驗結(jié)果和仿真計算基本一致。該方法可用于不同參數(shù)的超聲探頭傾斜入射時的聲場仿真,為制定軸類零件非拆卸情況下的檢測策略,提高檢測可靠性奠定基礎。
[Abstract]:All kinds of large shaft parts are complicated in shape, large in volume and mass, difficult to disassemble, and are mainly used to carry out flaw detection on the end surface of the shaft with small angle longitudinal wave probe.The small angle longitudinal wave ultrasonic detection method has a large number of applications in industry, and the research on the sound field of the small angle longitudinal wave probe is still less.Based on the theory of spatial pulse response, the spatial sound pressure model of a small angle longitudinal wave ultrasonic probe under wedge-wedge condition is established according to the waveform conversion and the ultrasonic transmission law under the interface condition.The calculation formula of the spatial impulse response is given, and the sound pressure distribution diagram in the medium with different wedge angles is obtained by simulation. The sound pressure and directivity diagram of the acoustic axis is tested by using the semi-circular step test block. The experimental results are in good agreement with the simulation calculation.This method can be used to simulate the sound field of ultrasonic probe with different parameters when it is tilted and incident, which lays a foundation for determining the detection strategy for shaft parts without disassembly and for improving the reliability of detection.
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本文編號：1751023