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ggeredeasilyintheNorth-Southseismicbelt,buttheearthquakesindifferentareahavedifferenttriggeringeffectintheNorth-Southseismicbelt,itisinfluencedgeologicstructure.

Theresearchonseismicdynamicstressisthereforeplicated,becauseitisaffectedbysomanyfactors:themainearthquakeparametersandstructureintriggeredarea,therestillhavethetimedelayproblematthesametime.Themainearthquakeparametershavebigeffectwhenwecalculatestresstensorinthetriggeredpoint.Changefaultthreekeyelements(rake,dipangleandslideangle),breakingtimeandrisingtimehavegreateffectonthefinalresultandtrendofthedynamicstress.Thechangeofthemainseismicmomentandthesizeoftheseismicfaultonlyaffectcalculatedresult,butwhosetrenddoesnotchange.Thechangeofmostmainearthquakes'parameterscanaffectthefinalresult,sowemustgetmuchmoreaccurateparameterswhencalculatingthedynamicstresschangingproducedbyearthquakes.Besides,tectonicsettingalsohasgreateffectontheearthquakedynamictriggering.Studyingindicatesthatmosttriggeredearthquakeshappenedingeothermalorvolcanicareaandextensionblocks.Wealsofindalittleoftriggeredearthquakesinnobbingblocks.Strike-silpandnormalfaultearthquakesaremoreeasilytriggerreddynamicstress.Seismicactivitywillbetriggerednotlongbeforestrongshockssurfacewavearrivedtriggeredarea,butlotsoftriggeredearthquakeshavetimedelay,thetimemaychangefromseveraldaystoseveralweeks.

Inshort,inmythesis,Ihaveimprovedthecalculatingmethodandprocedureofdynamicstress,calculateddynamiccoulombstresschange,whichtriggeredbysomeearthquakesintheNorth-Southseismicbelt.Atthesametime,westudiedeffectofearthquakedynamicstresstriggeringinducedbymainearthquakes'parametersandtectoniccharacteristicoftriggeredarea,andalso,wediscussedtheproblemofdynamictriggeringtimedelay.Atlast,wefoundseveralproblemsthatareworthtostudyinfuture.

Keywords:Seismicstresstriggering,CoulombMohr'circle,tectonicblocks,triggeringmechanics

论文中英文摘要

作者姓名:廉超

论文题目:地震定位新方法研究

作者简介:,,年月出生,年月师从于,于年月获士学位.

地震定位是地震研究中最经典,最基本的问题之一.随着计算方法计算机技术的发展,,多学科的相互交流与渗透球面交切法近震远震只要知道三个以上的到时差或能根据震相求出震中距,就能够快速定出震中位置,台网布局,震源深度,发震时刻对定位结果影响.

穷举定位法利用已发生的历史地震资料定位新发生的地震.与其它定位方法相比,台网布局和地壳结构不均匀性对其定位结果的影响比较小.且将新定位的地震输入数据库,增加历史地震的资料,对未来的地震定位的准确度也将不断提高.TheResearchofNewEarthquakeLocationMethod

LianChao

ABSTRACT

TheEarthquakeLocationisoneofthemostclassicandbasicproblemsintheSeismologicresearch.Asthedevelopmentofmathematicmethodandcalculatortechnique,EarthquakeLocationresearchgetsbigdeveloping.Thereareappearingvarioussuperiormethodsusingtolocateearthquake,suchasadouble-differenceearthquakelocationalgorithm.Inaddition,bymunicatingandpermeatingofmanycourses,itappearstogatherkindsofvariousadvantageofcalculationmethodinthewholeprehensiveEarthquakeLocationmethod.

ThispaperputforwardtothreenewEarthquakeLocationmethods.Itisformingaprehensiveearthquakelocationmethodbybinethemwithexhaustionearthquakelocationmethod.

Themethodofsphericalsurfaceshearingsuitableforthelocationofnearandfarearthquakewasproposed.Theshearingcalculationcanbedonedirectlyonthespherewiththemethod,theepicentercanberapidlylocatedwithonlyS-Parrivaltimedifferencesof3stationsatleast.Thestationdistribution,focaldepthandorigintimeaffectontheepicenterlocationless.

Theearthquakelocationcalculationcanbedonedirectlyinsphericalsurfacebyuseofthearrivaltimedifferenceofinitialmovementtoobtainthedifferenceofdistancebythemethodofsphericalsurfacetrack.Theepicentercanbelocatedrapidlysolongasthearrivaltimesofinitialmovementofmorethan4stationsareknown.Thesquaresumofdoubledifference(thedifferencebetweenthearrivaltimedifferenceofinitialmovementwavebyobservedandthetraveltimedifferenceofinitialmovementbycalculated)ofeachstationisselectedastheobjectivefunctionwiththemethodofsphericalsurfacetrack,sotheorigintimedoesn'taffecttheepicenterlocation.

Themethodofexhaustionrepeated-earthquakeslocationusingknownearthquakestolocatedthenewearthquakewhichhappenedsoon.Comparingwiththeothers,stationdistributionandtheheterogeneityofcrustalstructureaffectontheepicenterlocationless.Asthenewearthquakewhichislocatedaccuratelybeimportedintoearthquakedatabase,locatingprecisionofthemethodwouldincreasecontinually.

Synthesizingtheadvantagesofthreenewlocationmethods,itcouldreducetheinfluencepositionstheaccuracyfactortogotolowestbyusingdifferentmethodaccountingdifferentcircumstance.Soitcanobtainthesuperiorlocatingresult.Inconsiderofrequestabouthigherlocatingaccuracy,itcoulduseexhaustionearthquakelocationmethodtodotheearthquakerelocation.

Keywords:earthquakelocation,themethodofsphericalsurfaceshearing,methodofsphericalsurfacetrack,themethodofexhaustionrepeated-earthquakeslocation,exhaustionearthquakelocationmethod

论文中英文摘要

作者姓名:王涛

论文题目:钢筋混凝土框架-剪力墙结构弹塑性地震反应分析

作者简介:王涛,男,1978年9月出生,2004年9月

师从于中国地震局工程力学研究所孙景江研究员,于

2007年7月获硕士学位.

中文摘

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