Real-time nearfield acoustic holography for reconstructing the instantaneous surface normal velocity
Real-time nearfield acoustic holography for reconstructing the instantaneous surface normal velocity
复制标题
实时近场声全息重建瞬时表面法向速度
DOI：
10.1016/j.ymssp.2014.06.009
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发表时间：
2015-02
影响因子：
8.4
通讯作者：
Lin Geng
中科院分区：
文献类型：
--
作者：
Yong-Bin Zhang;Yong-Bin Zhang;Lin Geng;Lin Geng
本文推导了压力-速度脉冲响应，在时间-波数域中建立了压力与质点速度之间的关系。在此基础上，将实时近场声全息术(RT-NAH)扩展到从近场测量的随时间变化的压力中重建振动结构的瞬时表面法向速度，为非接触实时测量结构的瞬时振动提供了一种方法。对冲击钢板进行了实验研究，用激光多普勒测振仪测量了钢板表面的法向速度，并用RT-NAH进行了重建。用这两种方法得到的表面法向速度的比较表明，无论是对随时间演化的表面法向速度信号，还是对振型，都是令人满意的吻合。从而证明了RT-NAH是一种重建瞬时表面法向速度的可行方法。
A pressure–velocity impulse response is deduced in this work to establish the relationship between the pressure and the particle velocity in the time-wavenumber domain. By virtue of it, real-time nearfield acoustic holography (RT-NAH) is extended to reconstruct the instantaneous surface normal velocity of a vibrating structure from the time-dependent pressure measured in the near field, which provides a non-contact and real-time method to measure and visualize the transient vibration of the structure. An experiment of an impacted steel plate is investigated, in which the surface normal velocity of the plate is measured by laser Doppler vibrometry and reconstructed by RT-NAH. The comparison of surface normal velocities obtained by using these two methods shows a satisfactory agreement not just for the time-evolving surface normal velocity signals but also for the vibration mode shapes. Accordingly, it demonstrates that RT-NAH is a viable approach for reconstructing the instantaneous surface normal velocity.
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影响因子：
2.4
作者：
VERONESI, WA;MAYNARD, JD
通讯作者：
MAYNARD, JD
影响因子：
0.6
作者：
J. Hald
通讯作者：
J. Hald
DOI：
10.1121/1.3586790
发表时间：
2011-06
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
S. Paillasseur;Jean-Hugh Thomas;J. Pascal
通讯作者：
S. Paillasseur;Jean-Hugh Thomas;J. Pascal
DOI：
10.1121/1.1404381
发表时间：
2001-10
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
E. Williams
通讯作者：
E. Williams
影响因子：
2.4
作者：
MAYNARD, JD;WILLIAMS, EG;LEE, Y
通讯作者：
LEE, Y