OALib Journal期刊
ISSN: 2333-9721
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应力加载频率及振幅对大庆砂岩衰减特性影响的实验研究
Keywords: 衰减,初应力水平,三角波,加载频率,应力振幅,内时理论,p-m模型理论
Abstract:
?实验利用cmt5504微机控制万能试验机在不同初应力条件下,对干燥的大庆砂岩衰减(q-1)特性采用单轴压缩三角波循环加载方式进行研究。在保持应力振幅一定情况下,用应力—应变循环曲线计算了干燥大庆砂岩在0.001~0.01hz频率范围内的衰减特性;在保持加载频率一定情况下,计算了大庆砂岩衰减和应力振幅之间的关系。发现三角波加载所得的衰减在所取频段内与频率的关系和正弦波加载很相似,同一频率下衰减随应力振幅增大而增大,并且在频率和应力振幅相同的情况下衰减随着初应力水平的增大而减小。结合内时理论和p-m(preisach-mayergoyz)模型理论对结果进行了解释。最后利用所得的衰减、频率、振幅和应力水平关系对未知条件下的衰减进行了预测,和实验计算有较好的吻合。
References
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|
[2] | erringwm,jardctzkyws,prcssf.elasticwavesin,layeredmedia.ncwyork;mcgrawhillbookco,1957,87
|
[3] | johnsonpa,rasdolosaonpnj.nonlinear-clastic-ityandstress-inducedanisotropyinrock[j].jgeophysres.1996,101(b2):3113-3124
|
[4] | 席道瑛,陈韩,张涛.砂岩的变形各向异性[j].岩石力学与工程学报.1995,14(1):49-58
|
[5] | 徐彦,苏有锦,秦嘉政.q值研究动态[j].地震研究.2004,27(4):385-389
|
[6] | 席道瑛,刘爱文,刘卫.低频条件下饱和流体砂岩的衰减研究.地震学报,1995,17(4):477-481
|
[7] | 施行觉,胡亚轩,孙道远.非线性弹性模量对波速影响的实验研究.地震研究,2003,26(1);1-5
|
[8] | 温丹,施行觉.结合内时理论研究岩石衰减与应变振幅的关系.实验力学,2004,19(1);19-23
|
[9] | xuh,daysmandminsterjb.modelfornonlinearwavepropagationderivedfromrockhysteresismcas-urcmcnt.jgeophysres,1998,103;29915-29926
|
[10] | xuh,daysmandminsterjb.hysteresisandtwo-dimensionalnonlinearwavepropagationinbercasandstone[j].jgeophysres.2000,105(b3):6163-6175
|
[11] | valaniskc.fundamentalconsequencesofanewin-trinsictimemeasureplasticityasalimitoftheendo-chronictheory.archs,mech,1980,32(2):171-191
|
[12] | 孙道远,温丹,施行觉.岩石非弹性特性的内时理论模型[j].实验力学.2004,19(3):292-300
|
[13] | mccallkr,uuyerra.anewtheoreticalparadigmtodescribehysteresis;discretememoryandnonlinearelasticwavepropagationinrock.nonlinearprocessesin,geophysics,1996,(3):89-101
|
[14] | guyerra,mccallkr,boitnotun.quantitativeimplementationofprcisach-maycrgoyzspacetofindstaticanddynamicelasticmodullinrock[j].jouiialofgeophysicalresearch.1997,102:5281-5293
|
[15] | guycrra,johnsonpa.nonlinearmesoscopicclas-ticity;evidenceforanewclassofmaterials.physicstoday,1999,30:30-36
|
[16] | vandcnabcclckea,carmclictj,johnsonpa.influenceofwatersaturationonthenonlinearelasticmesoscopicresponseinearthmaterialsandtheimpli-canonstothemechanismofnonlincarity.jounalofgeophysicalresearch;,2002,107(b6):4-11
|
[17] | carmclictj,vandcnabcclckea.applicationoftheprcisach-maycrgoyzspacemodc1toanalyzemois-tureelectsonthenonlinearelasticresponseofrock.geophysrevist,2002,29(7):1-4
|
[18] | 包雪阳,施行觉.岩石模量与应变振幅关系的实验研究及理论解释.中国地震,2005,21(4);508-518
|
[19] | 包雪阳,施行觉.岩石非线性弹性的实验研究及其p-m模型的理论解释[j].岩石力学与工程学报.2004,23(20):3397-3404
|
[20] | 席道瑛,王春雨,田象燕.滞回曲线对应力振幅和频率的响应.物探化探计算技术,2001,23(2);121-124
|
[21] | 郭自强.固体中的波.北京:地震出版社,1982,243-244
|
[22] | 尹祥础.固体力学.北京:地震出版社,1985,337-338
|
[23] | 马丽云,赵建华,戴飒等.单轴压缩下大理岩的q值与频率关系的研究.地球物理学报,1990,33(6);689-693
|
[24] | 席道瑛,程经,易良坤等.饱和多孔岩石应力波的衰减特性.地震学报,1997,19(5):457-461
|
[25] | winklerk,nura,gladwinm.frictionandseismicattenuationinrocks[j].nuture.1979,277:528-531
|
[26] | azran,tutuncu,augostoletal.nonlinearviscoc-lacticbehaviorofsedimentary,partl:effectoffre-quencyandstrainamplitude[j].geophysics.1998,63:184-194
|
[27] | mccallkr,uuyerra.equationofstateandwavepropagationinhystereticnonlinearelasticmaterials.jgr,199,99(b12);23887-23897
|
[28] | 施行觉,徐果明,靳平等.岩石的含水饱和度对纵、横波速及衰减影响的实验研究.地球物理学报,199538(增1);281-287
|
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