复杂结构体系中声发射传播与能量衰减特性试验研究
|
摘要
为研究声发射信号在水电站厂房等复杂组合结构中的传播性能,在复杂梁柱结构中各代表位置布置了多组声发射探头并采集拟声发射信号,研究了声发射信号在混凝土结构、圆形空心钢管柱,圆形钢管混凝土柱中的传播性能,并对比了功率谱图及声发射参数。结果表明:(1)声发射信号传播经过柱体时有明显的能量衰减,且经过圆形钢管混凝土柱的能量衰减程度大于圆形空心钢管柱;(2)声发射信号从混凝土结构传至圆形钢管混凝土柱时,能量衰减率大于混凝土结构中的传播,能量衰减主要集中在10~50 kHz频率段;(3)声发射信号从混凝土结构传至圆形空心钢管柱中时,探头所接收表征能量值大于源信号处能量值。柱体影响范围内,传播经过圆形空心钢管柱的声发射信号等效传播速度大于混凝土中传播速度。对于圆形钢管混凝土柱,等效速度小于混凝土中传播速度。研究成果对复杂结构体系声发射检测具有重要参考价值。
In order to study the acoustic emission signal propagation property in complicated structural system such as hydropower house,several sets of acoustic emission probes are arranged at all the representative locations in complicated beam-column structure and the corresponding echoic emission signals are collected,and then the propagation properties of acoustic emission signals in concrete structure,circular hollow steel column and circular concrete-filled steel column are studied,while the power spectrogram and the acoustic emission parameter are compared as well. The result shows that:( 1) obvious energy attenuation is there during the acoustic emission signal propagation through column,and the degree of the energy attenuation through the circular concrete-filled steel column is larger than that through the circular hollow steel column;( 2) when acoustic emission signal propagates from concrete structure to circular concrete-filled steel column,the energy attenuation rate is larger than that of the propagation in concrete structure and mainly concentrates in the frequency band of 10 ~ 50 kHz;( 3) when acoustic emission signal propagates from concrete structure to circular hollow steel column,the characterized energy values received by the probe are larger than those from the source signal. Consequently,the equivalent propagation speed of acoustic emission signal through circular hollow steel column is larger than that through concrete within the column impacting scope. For the circular concrete-filled steel column,the equivalent propagation speed of acoustic emission signal is less than that in concrete. The study result has an important reference value for the acoustic emission detection of complicated structural system.
In order to study the acoustic emission signal propagation property in complicated structural system such as hydropower house,several sets of acoustic emission probes are arranged at all the representative locations in complicated beam-column structure and the corresponding echoic emission signals are collected,and then the propagation properties of acoustic emission signals in concrete structure,circular hollow steel column and circular concrete-filled steel column are studied,while the power spectrogram and the acoustic emission parameter are compared as well. The result shows that:( 1) obvious energy attenuation is there during the acoustic emission signal propagation through column,and the degree of the energy attenuation through the circular concrete-filled steel column is larger than that through the circular hollow steel column;( 2) when acoustic emission signal propagates from concrete structure to circular concrete-filled steel column,the energy attenuation rate is larger than that of the propagation in concrete structure and mainly concentrates in the frequency band of 10 ~ 50 kHz;( 3) when acoustic emission signal propagates from concrete structure to circular hollow steel column,the characterized energy values received by the probe are larger than those from the source signal. Consequently,the equivalent propagation speed of acoustic emission signal through circular hollow steel column is larger than that through concrete within the column impacting scope. For the circular concrete-filled steel column,the equivalent propagation speed of acoustic emission signal is less than that in concrete. The study result has an important reference value for the acoustic emission detection of complicated structural system.
引文
[1]杨永杰,王德超,郭明福,等.基于三轴压缩声发射试验的岩石损伤特性研究[J].岩石力学与工程学报,2014,33(1):98-104.
[2]范向前,胡少伟,陆俊.钢筋混凝土断裂全过程声发射特征辨识及相关参量影响[J].中国科学:技术科学,2015,45(8):849-856.
[3]FAN X Q,HU S W,LU J,et al.Acoustic emission properties of concrete on dynamic tensile test[J].Construction and building materials,2016,114:66-75.
[4]胡少伟,陆俊,范向前.混凝土损伤断裂性能试验研究进展[J].水利学报,2014,45(11):10-18.
[5]HU S W,LU J,XIAO F P.Evaluation of concrete fracture procedure based on acoustic emission[J].Construction and building materials.2013,47:1249-1256.
[6]陆俊,胡少伟.碾压混凝土断裂试验分析与静动态断裂韧度关系研究[J].中国科学:物理学力学天文学,2012,42(9):948-955.
[7]MOSTAFAPOUR A,DAVOODI S,GHAREAGHAJI M.Acoustic emission source location in plates using wavelet analysis and cross time frequency spectrum[J].Ultrasonics,2014,54(8):2055-2062.
[8]黄晓红,张艳博,田宝柱,等.基于相位时延估计法的岩石声发射源定位研究[J].岩土力学,2015,36(2):381-386.
[9]焦敬品,何存富,吴斌,等.基于模态分析和小波变换的声发射源定位新算法研究[J].仪器仪表学报,2005,26(5):482-485.
[10]龚仁荣,程志勤,顾建祖,等.模态声发射在结构材料缺陷定位中的研究[J].振动与冲击,2006,25(3):176-199.
[11]赵兴东,刘建坡,李元辉,等.岩石声发射定位技术及其实验验证[J].岩土工程学报,2008,30(10):1472-1476.
[12]毛汉领,王向红,黄振峰.基于小波包分析的声发射信号界面的衰减研究[J].振动与冲击,2008,27(9):139-141.
[13]肖俨衍,卢文秀,褚福磊.声发射信号在不同结构轴中传播特性研究[J].振动与冲击,2014,33(5):76-81.
[14]于金涛,丁明理.复合材料声发射传播特性试验研究[J].电机与控制学报,2012,16(8):107-112.
[15]孙立瑛,李一博,靳世久,等.充液管道中声发射波的传播及衰减特性研究[J].压电与声光,2008,30(4):401-403.
[16]宋小春,王亚午,李羽可,等.压力管道声发射检测缺陷定位仿真及验证[J].无损检测,2015,37(2):10-13.
[17]张志强,张国胜,刘艳芳,等.断铅试验声发射信号处理与损伤源定位研究[J].中国测试,2015,41(8):17-21.
[18]赖于树,熊燕,程龙飞.受载混凝土破坏全过程声发射信号频带能量特征[J].振动与冲击,2014,33(10):177-182.
[19]纪洪广,张天森,张志勇,等.无损检测中常用声发射参数的分析与评价[J].无损检测,2011,23(7):289-294.
[20]凌同华,张胜,易志强,等.岩石声发射信号能量分布特征的EMD分析[J].振动与冲击,2012,31(11):26-31.
[21]王向红,罗志敏,胡宏伟,等.裂纹长度和位置影响下声发射信号传播特性[J].仪器仪表学报,2015,36(12):2867-2873.
[2]范向前,胡少伟,陆俊.钢筋混凝土断裂全过程声发射特征辨识及相关参量影响[J].中国科学:技术科学,2015,45(8):849-856.
[3]FAN X Q,HU S W,LU J,et al.Acoustic emission properties of concrete on dynamic tensile test[J].Construction and building materials,2016,114:66-75.
[4]胡少伟,陆俊,范向前.混凝土损伤断裂性能试验研究进展[J].水利学报,2014,45(11):10-18.
[5]HU S W,LU J,XIAO F P.Evaluation of concrete fracture procedure based on acoustic emission[J].Construction and building materials.2013,47:1249-1256.
[6]陆俊,胡少伟.碾压混凝土断裂试验分析与静动态断裂韧度关系研究[J].中国科学:物理学力学天文学,2012,42(9):948-955.
[7]MOSTAFAPOUR A,DAVOODI S,GHAREAGHAJI M.Acoustic emission source location in plates using wavelet analysis and cross time frequency spectrum[J].Ultrasonics,2014,54(8):2055-2062.
[8]黄晓红,张艳博,田宝柱,等.基于相位时延估计法的岩石声发射源定位研究[J].岩土力学,2015,36(2):381-386.
[9]焦敬品,何存富,吴斌,等.基于模态分析和小波变换的声发射源定位新算法研究[J].仪器仪表学报,2005,26(5):482-485.
[10]龚仁荣,程志勤,顾建祖,等.模态声发射在结构材料缺陷定位中的研究[J].振动与冲击,2006,25(3):176-199.
[11]赵兴东,刘建坡,李元辉,等.岩石声发射定位技术及其实验验证[J].岩土工程学报,2008,30(10):1472-1476.
[12]毛汉领,王向红,黄振峰.基于小波包分析的声发射信号界面的衰减研究[J].振动与冲击,2008,27(9):139-141.
[13]肖俨衍,卢文秀,褚福磊.声发射信号在不同结构轴中传播特性研究[J].振动与冲击,2014,33(5):76-81.
[14]于金涛,丁明理.复合材料声发射传播特性试验研究[J].电机与控制学报,2012,16(8):107-112.
[15]孙立瑛,李一博,靳世久,等.充液管道中声发射波的传播及衰减特性研究[J].压电与声光,2008,30(4):401-403.
[16]宋小春,王亚午,李羽可,等.压力管道声发射检测缺陷定位仿真及验证[J].无损检测,2015,37(2):10-13.
[17]张志强,张国胜,刘艳芳,等.断铅试验声发射信号处理与损伤源定位研究[J].中国测试,2015,41(8):17-21.
[18]赖于树,熊燕,程龙飞.受载混凝土破坏全过程声发射信号频带能量特征[J].振动与冲击,2014,33(10):177-182.
[19]纪洪广,张天森,张志勇,等.无损检测中常用声发射参数的分析与评价[J].无损检测,2011,23(7):289-294.
[20]凌同华,张胜,易志强,等.岩石声发射信号能量分布特征的EMD分析[J].振动与冲击,2012,31(11):26-31.
[21]王向红,罗志敏,胡宏伟,等.裂纹长度和位置影响下声发射信号传播特性[J].仪器仪表学报,2015,36(12):2867-2873.