文章摘要
贺西平,张频,宋旭霞.单台阶同心圆盘辐射声场的指向性计算[J].声学技术,2009,(5):673~677
单台阶同心圆盘辐射声场的指向性计算
Calculation of the acoustic field directivity pattern of flexural vibrating single stepped concentric plate
投稿时间:2008-09-26  修订日期:2009-01-04
DOI:
中文关键词: 阶梯圆盘  辐射声场  指向性  圆环
英文关键词: stepped circular plate  radiated sound field  directivity pattern  circular ring
基金项目:国家自然科学基金(10874107);陕西省自然科学基金(2007A07)
作者单位E-mail
贺西平 陕西师范大学应用声学研究所, 西安, 710062 Hexiping@snnu.edu.cn 
张频 西安建筑科技大学理学院, 西安, 710055  
宋旭霞 陕西师范大学应用声学研究所, 西安, 710062  
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中文摘要:
      作为向空气中辐射的声辐射器,弯振阶梯薄盘或矩形板在工业上有很多应用。由于计算的复杂性,以前的文献对阶梯圆盘的声场指向性未作研究。利用点声源组合的方法(Rayleigh积分),计算了边界自由的弯振阶梯圆盘辐射声场的指向性,与弯曲振动的圆盘相比,阶梯圆盘的声场指向性得到了明显改善,理论计算结果与Gallego的实际测试图案相吻合。计算为这类辐射器的高效应用、优化设计提供了理论依据。
英文摘要:
      As a kind of air acoustic radiator the flexural vibrating stepped thin circular plate or stepped thin rectangular plate has many applications in industry.The directivity pattern of the stepped circular plate has not been reported in theory due to complexity of computation.In this paper,the radiating sound field directivity pattern of flexural vibrating stepped thin circular plate with free border is studied by applying the directive theory of built-up point sources(Rayleigh Integral).The directivity pattern of the stepped circular plate is much improved in comparison with that of the common flexural vibrating circular plate.The theoretical directivity pattern is in good agreement with the measured result of Gallego.The computation in this paper can provide a theoretical basis for efficient utilization and optimized design of this kind of vibrators.
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