地震波理论研究进展介质模型与地震波传播牛滨华.pdf
9页
¹o ØùîÉZ———ºÉ йo.l牛滨华, 孙春岩(ÏS¹ÉvÐ,Ø100083)K 1 介质模型及地震波传播是地震波理论的核心内容之一,本文结合作者目前研究所涉及的内容,阐述了介质模型及地震波传播的相关问题.首先是地震学背景中的地震波传播的主要问题.其次是地震波传播的动力学,其中的主体内容可以由波动方程的建立、波动方程和波动方程的延伸三部分组成.再次是地震波的传播与介质因素和界面因素,以及孔隙介质模型的认识和讨论.最后结合均匀弹性各向同性、粘弹性各向同性、双相介质和各向异性四种介质模型,阐述了地震波传播的主要特性.1oM 介质模型,地震波传播,波动方程,介质因素和界面因素,孔隙介质,四种介质模型Ïms Ë| P315 ÓDSM A ÓcI| 1004-2903(2004)02-0255-09Developing theory of propagation of seismic waves———medium model and propagation of seismic wavesNIU Bin-hua , S UN Chun-yan(China University of Geosciences, Beijing 100083, China)Abstract The medium model and propagation of seismic w aves is the core problem of seismology and theory of wave propa-gation, which cover a series of relevant subject fields.This paper addresses some aspects of this problem based on previousstudies and our current research w ork.Nonelasticity, non-single phase, and anisotropy of the earth media, inversion, non-linear seismic wave, and earthquake prediction are problems w hich are develop much attention.Dynamics of seismic w avepropagation consists of establishment of w ave equations, wave equations and extension of w ave equations.Propagation ofseismic w ave is closed related w ith media and interfaces.At present studies on the propagation of seismic wave in porousmedia, viscid media, and anisotropic porous media are of frontal subjects of research.Finally we present the main featuresof seismic wave propagation in conjunction w ith homogeneous isotropic elastic, visco-elastic isotropic, two-phase andanisotropic medium models.Keywords medium model, propagation of seismic wave, w ave equation, medium and interface, porous medium, fourtypes medium modellà ° ù 2003-07-10; ©í ° ù 2003-08-20.Á[ " SE1 SÐÁ49974028[ "、SEEô8639ÃZ ? £þ¹MY/[ "、SEEô8639ÃHWwM¹Ð [ "、SEEô8639ÃZ ? £þ¹ oÄÐ >°/[ "#ÏS¹ÉvÐ(Ø)“¹/©/ÐN”“ûF /、'Vñ#©/”â×ÄLi[ " ó'ù.Teº d^¿, 1953 M3 ¦, 3, ¦,ÏS¹ÉvÐ(Ø)q,¹ oþ ØÐpV,ö1VY¹o.l ØШ, ?÷¹Ä¹ö¥8 >ZEШРSùýT.(Email:niubh1@)0 引 言¹o Ø^BÕpvÚ'¥8".¹o ØV¹o¥þ ØVñ In V[s¹:¹o¥? ¦ý?、¹o¥.l¤l@c Øs 8¥ Ø. ,_ ð¹o Øs Ë,Î V[¤ Õ]T¥s ˲T; è ¹o.l¥Q Ø©.5¨ Õs ËZE,ºÉ йo.l5^¹o Ø¥ = ¸B.'Ó1ÿ¹o.l ØÏ¥“ºÉ йo.l”¥µ1 Ø.¹o.l ØÐ ð SÐØB"^BÕ?Z¥ SÐ Ø.yN, ¦ÌµA11ÿÕ Ø#¨  ?Ã?Z.Õ1ÿ»1 9 »2 ù¹ o þ Ø Ð É ZVol.19 No.22004 M6(255～ 263) PROGRESS IN GEOPHYSICS June 2004c - ¦×1ùîîTÚBÂ¥9²,Cµ¹o.l ØîTö8 = ¸¥ ªM,¹o.l Ø©M8"~¶ ÿ¥± I.k¿f ,TÐ î ?iü1- " -ùî = ¸î #¥S¶, 'Óe¹o.l Ø¥M1Ù5. Ïö1 = ¸µ:¹Ð ßϹo.l¥'Ù5,¹o.lî ïÐ¥'Ù5,¹o.lкɸë¥1", d#ºÉйo.l,[# ( ò_]©¹ÕºÉ # ¹o¥.l.1 地震学与地震波传播¹Ð^ùî¹ o =²Ð/¥×1m.¹ÐdÂ÷、.l、¤l、ºÉîsºÉ²/©Ù Ù5.¹Ð V[s¹? ¹Ð、©Ð、¹Ð、 +Y¹Ð、 ¹Ð >¹Ð©Ù s¦5×.¹ÐùîS¶ #¹ oª ²、? ¹ç©]、¹ T¹§þÉîs²Ð/©、 ?÷ >、£ÓÌâýñyý©©ZZëë,XÜÐ ¦ ËöÍ、Ü6 +YáVs.yNsS =¹Ð¸¥ ÔqS¶ =hïÍ þL( .©, 1990). è Â,¹o.lÎ¥ò_sB°^ùî¥ -Ù5,¹ oª ²¥ ªMÐo¥ò_sá Vs, 1999 M¹þÉîsò_s¥?C,$T¹ M¥W¸Ev1 SÐÔ,@nºÉò_sùî¥×1.ºÉ¥dM,  d#@8ºÉ ² ?÷%ª、? £þ、£Ó、Ìâ、ýñ¹É]ç©]Í©Zëûµá M1",]"B°^ùî¥ -Ù5.(2)¹o.lQÙ5^¹ oþ ØÐÏBñ¥ ØÙ5(°õl©,1991). Ïc¹oQ,ªî^Ð ÊMî^/.Q¹oÎ¥ªî^/'î(Dziew onski , 1984;Yanovskaya ,1984;Nataf .©, 1986); ÊMî^¥BñKö1/^µKµsE, 77ýT^®ÅS® vÐJ.Claerboutqî¥(Claerbout ,1971),áS¥ BqBÊ/S×1D( B,1989).(3)dL¹o¥.l. ¹ oºÉÏ.l¥¹o^dLo,®¿4©m¥KÅ[#ý ") Ø¥ Ø$.OoÆs³ÜoÆ+ùîйB:oooÆ¥ùî,®oÆùñ.N,oÆs³'& ?ïC¹o.l¥ ÏÄ×1+. èÂ,1Í(Biot .M .A .) d#@8ºÉ@MîsÐ5i >ÈO,i o î. Â,ò_sºÉ8í ÊZ_Ðo¥.lZ_i ʵ©.t×1C`²û^YVoÆs³ª¤¥.oîZñ¥Y³'of. p³¡@oîZñof^B Ë = ¸ ã OµBç 4¥ = ¸, ÚÇ ;? ¹ç、ûrÁ á、 CF@©h]; Ìâ SÐ、ýñ ïÐ、3þ ïÐ[#S]©5×,TºÉ ØШùîµ"+y¥×1¹Êi?è" v¥T¨. ÆTºÉ¥ Ø) ØZE^°¤VîZ。
