首页 | 本学科首页   官方微博 | 高级检索  
     

低频声有源吸收理论研究
引用本文:陈克安,尹雪飞.低频声有源吸收理论研究[J].振动与冲击,2000,19(1):71-74.
作者姓名:陈克安  尹雪飞
作者单位:1. 西北工业大学航海工程学院,西安,710072
2. 西北工业大学电子工程系,西安,710072
基金项目:国家自然科学基金资助项目! (编号 :596750 13)
摘    要:为了吸收低频入射声 ,作者提出了一种有源吸声结构 ,本文从理论上研究了该结构的吸声性能。文章首先建立理论模型 ,然后通过近场方法和求解弹性板 -声腔耦合系统结构响应推导了有源控制前后反射声功率的计算公式 ,然后按声反射功率最小化准则求得最佳有源吸声效果。最后通过一系列算例证明了该吸声结构吸收低频声波的有效性 ,并研究了吸声效果与次级力源位置的关系

关 键 词:声场有源控制  有源声吸收  声腔-结构耦合

THEORETICAL STUDY ON ACTIVE ABSORPTION OF LOW-FREQUENCY SOUND
Chen Kean,Yin Xuefei.THEORETICAL STUDY ON ACTIVE ABSORPTION OF LOW-FREQUENCY SOUND[J].Journal of Vibration and Shock,2000,19(1):71-74.
Authors:Chen Kean  Yin Xuefei
Abstract:In the paper,active absorption of low frequency incident sound is theoretically investigated.The theoretical model of the proposed active surface is firstly established,and then by solving response of the cavity_structure coupled system,an analytical expression for calculation of reflected acoustic power is derived based on the nearfield approach,and the optimum sound reduction in the reflected sound power before and after control are obtained using the active minimization strategy. It is shown from a series of numerical examples that the proposed active surface is suitable for absorption of low frequency incident sound in threedimensional space. Finally the dependence of sound absorption on the location of the secondary force source is investigated theoretically.
Keywords:active control of sound  active sound absorption  cavity_structure coupling
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号