基于虚拟波阵面的层合板声发射源定位  被引量:7

Acoustic Emission Source Location in Laminated Plates Based on Virtual Wave Front

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作  者:刘治东[1] 庞宝君[1] 唐颀[1] 

机构地区:[1]哈尔滨工业大学空间碎片高速撞击研究中心,黑龙江哈尔滨150080

出  处:《压电与声光》2010年第3期493-497,共5页Piezoelectrics & Acoustooptics

摘  要:空间碎片在轨感知系统对层合板中的声发射源定位提出了需求,这是声发射定位技术的重要研究课题。利用虚拟波阵面的概念提出了一种应用于层合板的多传感器声发射源定位方法,将定位方程的求解转化为求取一元函数最小值的优化问题,并利用黄金分割法对其进行求解。在玻璃/环氧单向铺设层合板与正交铺设层合板上对铅芯折断波源进行了定位实验。结果表明,该方法可有效应用于层合板定位问题,当材料波速较低时定位精度较高,并在采用多传感器阵列时可取得比3传感器阵列更高的定位精度。该研究结果也为空间碎片在轨感知系统的研制提供了参考。Sensor systems used to detect impacts on spacecraft promotes a demand for acoustic emission(AE) source location method in laminates,which is an important research field in AE.Based on the principle of virtual wave front,a new AE source location method for the laminates was derived,and a univariate function was used to present the location problem,and the golden section search method was used to solve the problem.Experiments had also been carried out on both unidirectional and bidirectional glass fiber reinforced epoxy composites laminates using a leadbreak AE source.The experimental results indicated that: this method could be used in the laminates effectively,when the wave velocity in the plate was lower,the location precision would be higher.Compared with 3 sensors array,the multi-sensor array could obtain better results.The result also provided a reference for the development of the sensor systems to detect impacts on spacecraft.

关 键 词:声发射 空间碎片 层合板 源定位 波阵面 

分 类 号:TP274.2[自动化与计算机技术—检测技术与自动化装置]

 

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