节点文献
基于等时差波阵面的层合板声发射源定位
A Method Based on Isochrone Wave Front for Acoustic Emission Source Location in Laminated Plates
【Author】 Zhidong Liu,Qi Tang,Baojun Pang (Hypervelocity Impact Research Center,Harbin Institute of Technology,Harbin 150001)
【机构】 哈尔滨工业大学空间碎片高速撞击研究中心;
【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。本文利用等时差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,并且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。本文的研究结果也为空间碎片在轨感知系统的研制提供了参考。
【Abstract】 The sensor systems to detect impacts on spacecraft promotes a demand for acoustic emission(AE) source location method in laminates,this is a import research field in AE.Based on the principle of isochronal wave front,a new AE source location method for the laminates is derived,and a univariate function is used to present the location problem,the golden section search method is used to solve the problem.Experiments have also been carried out on both unidirectional and bidirectional glass fiber reinforced epoxy composites laminates using a leadbreak AE source. The experimental results indicate that:this method can be used in the laminates effectively,when the wave velocity in the plate is lower,the location precision will be higher,and compare with using 3 transducers,4 transducers can obtain a better result.The result also provide a reference for the development of the sensor systems to detect impacts on spacecraft.
【Key words】 Acoustic; Emission; Space debris; Laminated plate; Source location; Wave front;
- 【会议录名称】 第十五届全国复合材料学术会议论文集(下册)
- 【会议名称】第十五届全国复合材料学术会议
- 【会议时间】2008-07-24
- 【会议地点】中国黑龙江哈尔滨
- 【分类号】TB303
- 【主办单位】中国力学学会