_^^ KHOA HOC VA CANG NGHE MO KHAO SAT CHAN DONG NO MIN KHI DAO HAM B^NG PHU'ONG PHRP KHORN NO AAJN THRNH PHO THONG QUA MO HINH zD ThS D A N G V A N KIEN Trwdmg D^i hgc Md-Dja chit i|k rong thi edng edc cdng trinh ngim thdnh phi mim Abaqus Trong md hinh, bien sd dgng Id loai I bing phuang phdp khoan n l vi$c dam khdng phan xa (Non-Reflecting Boundary Condition' bdo an todn cho cdc edng trinh Idn edn Id ydu ' NRBC) dg'a tren vi§c sd dyng phin tu vd han (Infinite clu quan trpng Hipn dd cd nhilu cdng trinh nghidn element - IE) tai bidn Cdc phdn cdn lai cua md hlnh cdu d nudc ta vd trdn t h i gidi phdt triln cdc md su dgng phin tu hdu han (Finite Element-FE) hinh d l md phong chin dOng cua n l din cdc Cac thdng s6 du'dng h i m nghien ci>u cdng trinh lan cdn nhidn vide dp dgng cho mpt 1.1 Md taSirimg ham cdng trinh eg the cdn nhilu han chl Ngodi ra, edc Dudng harii Croix Rousse Id mpt cdng trinh him md hinh ehua chi!) y diy du d i n dilu kipn khii dd xung quanh hoae chua xem xdt den anh hudng giao thdng thj, nam d thdnh Lyon, Phdp, eua mOt so thdng s l quan trpng nhu h$ s l giam giua sdng Rhdne vd sdng Sadne Chieu ddi cua dudng him Id 1757,5 m vdi di$n tich mdt cit ngang chln[9H13]- Bdi bdo trinh bdy kit qua cua vi$e phdt triln mpt eua 84.10 m l Vj tri him nim d khu vg'c rit ddng md hinh ehilu (2D) de nghidn cuu anh hudng dan cu vd cd nhilu tda nha gin dd [1]; cung mpt luc, cua chin dOng n l tai dudng him Croix ed mOt dudng him cO ton tai nim song song vdi Rousse, Lyon, Phdp Tai ddy dd tiln hdnh nghien him mdi (H.1_) Dudng ham dang tin tai cd dang cdu v l anh hudng cua h# s l giam chin den chan vdm tudng thing Bdn kinh vdm Id 8,05 m ehilu cao dOng sinh no din cde cdng trinh Idn can tudng m Dudng him dao mdi gin dd cd dang bdng md hinh 2D Md hinh so dup'c xdy dyng dvfa hinh vdm mdng ngvra Bdn kinh eua vdm Id 5,55 m trdn phuQ'ng phdp phin tu, huu han bing phan Khoang cdch gida hai trgc dudng him la 42,6 m a) -.# 42,6m tfftSlsl 29,3m *i TJ VICIE iFflJBB Cam bien A " Cam biln P ^ M Him md'i H Diiu IdSn tit02(4iM2-^20>l) (2) 2(4ito2-^2toi) day coi Id tan so chan dpng dau tien vd UJ2 Id tan so chin dOng Idn nhit cua t i n s l quan trpng quan tdm (thudng fi=u)i/2 TT vd f2=t02/2TT) Cae h§ s l cua md hinh giam chan ^,va ^2tuang dng vdi tan so coi va uiz- Hp so giam chan k i t hp'p vdi c h l d0 chin d$ng j dup'c xde djnh thdng qua phuang trinh: (3) 5j=H.5 Kich thuuc md hinh 2D 2.2 Diiu ki$n bien Phin tu v5 han da dup'c su dgng d l tao bidn khdng phan xa (non-reflecting boundary condition) cho md hinh nghidn cdu ndy, vdy tai bidn 2.4 Md hinh ap /{K no Ap lye n l sinh tir vl|c ma ring cdc tCr vg nl, cd the dypc tinh theo cdng thyc theo de nghi cua cdc Kenya vd Walter (1991) [5]: "" 449,93xSGeXVOD^ + 0,8SG CtNG NGHIEP MO $66-2014 ^' ^^_^ KHOA HOC V4 CdNG NGHl MO Trong dd: Pa - Bai ii/png dp lyo n l Pa; SGe - Mdt dd cua thulc n l , g/cm*; VOD - Vdn tic sdng n l cua thulc n l , m/s d l y j l khoan B l d l cdp d i n sy anh hudng cua khoang tring giya cdt thulc n l vd thdnh l l khoan, phyang trinh xdc dinh dp lye sau ddv dypc SU" dgng: chdm n l cd mpt s l l l n l dong thdi Ap lye ni cd t h i dan gian hda Id tai trpng ddo ldp cOni Vdi dp lye Idn nhit len bien him mdi Id (PB) M vin thdi gian chdm no, hdm thdi gian f(t) dyo chpnnhyH.7 w uvt No "ly tuong' Trong dd: P j - Bai lyang dp lye Idn thdnh l l khoan dudng kinh l l khoan, mm M I!'-tas"\^" ''""% '* ' ° * emulsion Rdelle vdi SC.ri:fh"(6r' "*' *"° "^ "^""'"' P(t) = F%.f(t) = 7,478.f(t); GPa (6) Trong dd: f(t) - Hdm dp lye theo thdi gian Hdm hlnh dang dd dupc sy dgng de cd dypc quan hp gite dp lye n l vd thdi gian Hiu hit cdc , dang hinh sin cho hdm dp lye Chdng han hdm thdi gian dupe sy dgng bdi Park vd edc cdng sy [5Jf(t) = Trong dd f(t) - Phyang trinh hinh dang- t la thdi gian ddnh gid vd 1^=0.0003361 s Id thd gian da dypc dp lye Idn nhit ^ " 2BDTWl3Bn.TO dd e u f h l ,?„T ,'!^°"? "? -"'"