机枪动力学特性测试的传感器优化配置方法研究
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摘要
在机枪动力学特性测试过程中,传感器的配置对试验质量有一定的影响。在有效独立法的基础上,提出了一种传感器优化配置的融合方法。首先运用有效独立法对某型机枪模态测试的传感器配置进行了分析,通过有限元方法得到的模态向量矩阵进行列主元分解,得到初始测点配置,接着用有效独立法确定候选添加测点的集合,该方法充分利用了有效独立法和MAC法的优点,实现了传感器的优化配置,为模态试验获取结构动态特性提供了基础,并对某型机枪进行了试验模态分析,获得了其结构动态特性。
In the test process of machine gun dynamics characteristics,the location of sensors has much more influence on the test quality.A new kind of fusion method so-called sensors optimization configuration was put forward on the basis of effective-independent method.Firstly,the effective-independent method was used to perform the modal test in a type of machine gun,and its sensor placement were analyzed.The modal vector matrix acquired from finite element method was decomposed by use of main-element method to obtain the placement of original test points.Secondly,the candidated test points were determined through effective-independent method.The method takes full advantages of effective-indepen-dent method and MAC method,and it can realize the optimization placement of the sensors.The method can provide basis for getting structural dynamic characteristics of machine gun.The dynamic modal analysis of a kind of machine gun was carried out to acquire its structural dynamic characteristics.
In the test process of machine gun dynamics characteristics,the location of sensors has much more influence on the test quality.A new kind of fusion method so-called sensors optimization configuration was put forward on the basis of effective-independent method.Firstly,the effective-independent method was used to perform the modal test in a type of machine gun,and its sensor placement were analyzed.The modal vector matrix acquired from finite element method was decomposed by use of main-element method to obtain the placement of original test points.Secondly,the candidated test points were determined through effective-independent method.The method takes full advantages of effective-indepen-dent method and MAC method,and it can realize the optimization placement of the sensors.The method can provide basis for getting structural dynamic characteristics of machine gun.The dynamic modal analysis of a kind of machine gun was carried out to acquire its structural dynamic characteristics.
引文
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[3]杨世文,董小瑞,苏铁熊,等.利用有限元预分析优化机体模态测试方案[J].内燃机工程,2003,24(3):67-70.YANG Shi-wen,DONG Xiao-rui,SU Tie-xiong,et al.Opti mizing modal test options for engine block usingFEA pretest analysis method[J].Chinese InternalCombustion Engine Engineering,2003,24(3):67-70.(in Chinese)
[4]李宏男,李东升.土木工程结构安全性评估、健康监测及诊断述评[J].地震工程与工程振动,2002,22(3):82-90.LI Hong-nan,LI Dong-sheng.Safety assessment,health monitoring and damage diagnosis for structuresin civil engineering[J].Earthquake Engineering andEngineering Vibration,2002,22(3):82-90.(in Chi-nese)
[5]KAMMER D C.Sensor placement for on-orbit modal identification and correlation of large space structures[J].Journal of Guidance,Control and Dynamics,1991,14(2):251-259.
[6]刘斌,姚永丁,叶贵如.斜拉桥传感器优化布点的研究[J].工程力学,2005,22(5):171-176.LI U Bin,YAO Yong-ding,YE Gui-ru.Study of opti-mal sensor placement for cable-stayed bridge[J].En-gneering Mmchanics,2005,22(5):171-176.(in Chi-nese)
[7]KAMMER D C.Effect of model error on sensor place-ment for on-orbit modal identification and correlation oflarge space structures[J].Journal of Guidance,Controland Dynamics,1992,15(2):334-341.
[8]THOMAS G,CLARK and CLARK R.DOHMANN.A modal test design strategy for model correlation[C].Proceeding of the 13th.International Modal AnalysisConference.New York:Union College,Schenectady,1995:927-933.
[9]CUSANO A,CAPOLUONGO P,CAMPOPIANO S,et al.Experi mental modal analysis of an aircraft modelwing by embeded fiber bragg grating sensors[J].IEEE Sensors Journal,2006,6(1):67-77.
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