本文關(guān)鍵詞： 指向性 階梯盤 階梯數(shù)目　出處：《機械科學(xué)與技術(shù)》2017年10期 　論文類型：期刊論文

【摘要】：指向性是衡量聲源性能的重要參數(shù)。本文中研究了階梯盤指向性與階梯數(shù)目之間的關(guān)系。設(shè)計了頻率和基底厚度一定的1~4階階梯盤。計算了4個階梯盤以及與階梯盤對應(yīng)的同頻率、同半徑的活塞盤的指向性。結(jié)果表明,階梯盤與和它同頻率同半徑的活塞盤的指向性主瓣同,但前者的旁瓣比后者多。頻率、基底厚度一定時,階梯數(shù)目越多(對應(yīng)的半徑也越大),指向性也越尖銳。實驗測試與理論計算結(jié)果相符。
[Abstract]:Directivity is an important parameter to measure the performance of sound source. In this paper, the relationship between the directivity of step disk and the number of steps is studied. A 1 / 4 step disk with constant frequency and substrate thickness is designed. Four step disks and four steps are calculated. The same frequency corresponding to the ladder plate, The directivity of the piston disc with the same radius. The results show that the directional main lobe of the step disc is the same as that of the piston disc of the same frequency and radius, but the side lobe of the former is more than that of the latter. The more the number of steps is (the larger the corresponding radius is, the more sharp the directivity is.) the experimental results agree with the theoretical results.
【作者單位】： 陜西師范大學(xué)物理學(xué)與信息技術(shù)學(xué)院陜西省超聲重點實驗室;
【基金】：國家自然科學(xué)基金項目(11374201)資助
【分類號】：O426.2
，

本文編號：1506065