(10) BO KHOA HOC VA CONG NGHE CHlTONG TRINH KHCN CAP NHA NUdC KC 08/06-10 D6 TAI: 'Nghien cii-u cas&khoa hpc va di xuit cic giai phdp khoa hpc cong nghf bao dam s(r on dfnh va dp ben cua de Men hifn c6 irong trir&ng App sdng, triiu ctr&ng tran qua de" Ma so: KC08.15/06-10 BAO CAO NGHIEN CCrU THi NGHIEM MO HJNH VAT LY MO PHdNG V£ CO CHt PHA HOAI DE BlfeN KHI T H ^ P SONG LON TRI^U CLfCTNG TRAN DlNH Cff quan chu tri: Trifang Dgi hoc Thuy Igi Chu nhi#m 6k tai: GS.TS Ng6 Tri Vieng Ha noi, 2010 BO KHOA HOC VA CONG NGHE CHUONG TRINH KHCN CAP NHA NlTdC KC 08/06-10 BE.TAI: "Nghien cieu cffs&khoa hoc va dexuat cdcgidiphdp khoa hoc cong nghe bdo dam sir on dinh vd dp ben cua de Men hiin CO tne&ng h(/p song, trieu ctrafng trdn qua de" Ma sS.KCOS 15/06-10 BAO CAO NGHIEN CirU THI NGHieiW MO HINH VAT LY MO PHONG VS CO Cne PHA HOAI BE BieN KHI T HOP SONG LON TRieu CU-ONG TRAN DINH CHU NHIEM DE TAI N CHB TRI D GS.TS.Ng6TriVi4ng BO KHOA HOC VA CONG NGHE BAN CHU NHIEM CHLTONG TRINH KC.08/06-10 Ha ngi, 2010 « (9 12010 MyCLUC CAC N O I D U N G C H I N H C O A BAO CAo: Mo- Aku I Stf lirg^c 1^ thuy^t mo hinh s6ng 1.1 van de chinh thai va bi^n thai 1.2 Phuang trinh hSng s6 tuong tir II Gioi thif u v^ cdc md Mnh cdng trinh Trang 3 4 2.1 Cac loai c6ng trinh hif bien 2.2 Muc dich va yeu cau ciia cac mo hinh cong trinh 10 III Muc ti@u, n$i dung thi nghi^m 11 3.1 Muc tifiu nghiSn cihi 11 3.2 Noi dung thi nghiem 12 IV M3 phdng tuong tu* cSc gid tri trSn m6 hinh, chon ti le mo hinh 4.1 Chon ti le mo hinh 4.2 Cac dieu kiSn bien vS sQ h$u dia Mnh, thuy hai van: V He th^ng thiet bi thi nghi§m yh kilm djnh mo hinh 13 13 14 15 5.1 Chuin bi thiSt hi dac 15 5.2 Kilm dinh thiit bj, m6 hinh 18 5.3 Kiem tra \k dfl tirong tu hinh hoc, luang, the tich cua IcSt cSu dua vao thi nghiSm 24 5.4 Kfit luSn Idem dinh m6 hinh 26 VI PhSn tfch ket qu^ thi nghiem trSm mo hinh song 27 6.1 K£t qua thi nghiem song tran 27 6.2 Ket qua ttii nghiem ca che sat la b5i, pha huy de duoi tac dpng cua tS hap song Idn triSu cuong tran dinh 32 Vn Kk luan 47 BAO CAO CHUYEN BE TONG HOP "BAO CAO NGHIEN CUU THI NGHIEM MO HINH VAT LY MO PHONG VE CO CHE PHA HOAI DE BIEN KHI TO HOP SONG LON TRIEU CLTONG TRAN DINH " M6DAU Trong giai doan thiet kg thi, nhiSu c6ng trinh bb biin c6 thi duac thigt ke bang viec sii dung cong thilc kinh nghiem va cac ducmg quan he phat trien tir cac thiir nghiem m5 hinh vSt ly ty le nho cua cac cong trinh dai dien Trong cac thiet ke Ian han, cfc cflng trinh bb biSn dat hon tren thS gioi viec thi nghiSm va toi uu hoa sil dung mo hinh thuy luc vat ly la dieu bat bupc Chi phi tuang doi ciia viec thiic hi6n mOt nghien cijtu mo hinh vat ly thuang vin nho hon so voi chi phi cua toan bo mgt c6ng trinh duoc thi6t kS hoac mot cong trinh yeu cSu sua chQa thuang xuyen Kamphuis (1991) da chi su cin thiSt ti6p theo cho cac thi nghi'im mo hinh vat ly cua cac cong trinh bo biln bang each luii y ve mat philc tap thCt de mo phong v6 mat toan hoc su tuong tac giiia song va cac cong trinh tren bai, de bijn Six dung lai the cua phuong phap tren de tai da sii dung ti6n hanh nghien curu thi nghifim tren mo hinh vat ly de mo ph6ng ve co chi pha hoai de biln c616 hop song loti trilu cuong tran dinh I SO LirOC LY THUYET M HINH SONG Trong khu vuc ciia song va bo biln, mat nuac rflng, gio to bao Idn, song luon la ylu t6 quan tSc dong den diln bien dia hinh long din va cac loai cong trinh, cjn tiln hanh nghien ciiu tren mo hinh song Van de nghien curu mo hinh song bao gom phuong difin: - Mot la, nghien curu tuong tac giura song va cong trinh lam can cii cho thiet kl: Vi du nghien ciiu ap luc song len tuong durng, tuong mai nghieng, cong trinh C lo xuyen thong, cong trinh n6i v.v, nghien ciiu lire neo cua tau thuyen doi O vdi bin va sir 6n djnh cua ban thSn tSu thuyln - Hai la, nghien curu b6i ling lu6ng tau, bSn c4ng du6i tac dung cua s6ng, dilu kien neo cSp va chay tau NhQng van de on dinh cua bo, chuyin dong bim cat doc bo song tao diu thuoc loai van de Nghien ciiu loai vSn dl thii nhSt thucmg thuc hien mo hinh mat cit, chi cin tiln hanh thi nghiem mang song, yeu chi vl hjng s6 ty 16 m6 hinh tuong d6i nho, tiic la mo hinh c6 the lam tuong doi Idn mdi dam bao chinh xac quan trie Loai vin dl thii hai dIu phai nghien ciiu mo hinh t6ng thfi, hang so t^ 16 mo hinh c6 thi ISy 16n hon, mo hinh c6 thi lam nho hon d be song 1.1 Van 6e chinh thai \k bi^n thai Ngoai hinh dang va dO sau vimg nude, hien tugng song dl cap din c4c ygu to song va qua trinh Ian truyin cOa n6 D I C6 duoc sir tuong tir vl dong thai va dSng lire, cSn b4o d4m tit tuong tyr vl hinh hpc, vi vay m6 hinh song thutag dugrc thilt k l theo m5 hinh chinh thai, chi trudng hap sir han chi kh6 khac phuc ciia khu vyc thi nghiSm hoSc yeu ciu cila c4c dilu kite tuong tu khac, mai xet den m6 hinh biln thSi Trong thvc tiln d6i vdi mo hinh mat cjt, chi C mo hinh chinh thai va hlng s6 ty 1? mo hinh tuong dli nho, Xir (1.12) L, Cong thiic cd dang ham s6 rieng sieu viet, vilt phuong trinh hang s61^ 16 nhu sau: (1.13) A "•IS (1.14) Vl Ls = CTs, tacd: ^IS =1 Tir d6 nhan duac: Co hghta la, hiing s6 ty 1? chi6u dai song XLS va h§ng s6 t^ IB kich thu6c thang diing Xh bang Trong trudng hgp do, hang s6 ty 16 toe dp truy6n sdng Ic bang hang so ty 16 chu ky sdng XLS , ciing bSng s6 luu tie %„ Khi sdng ti6n vao ba, dd sau thay ddi, hudng sdng va tie dO song dIu thay ddi (hinh l-I va 1-2) Trong dilu kien chu ky sdng Ts khong ddi, quan he giita gdckhilc xa d va tdc dd truyin sdng C nhu sau: sin«^ = ^ sin a, C| (1.17) Trong dd d la gdc giura hudng sdng va phap tuyin ciia dudng ddng miic, ky hieu bi6u thi sdng tdi, bilu thi sdng khiic xa Vilt phuang trinh hlng s6 ty 16 tacd: i^=l,X.i = l (1.18) Ki^Kt (1.19) Vi vay, tuang tu khiic xa yen cau gdc tia tdi va gdc khiic xa mo hinh bang vdi yeu to tuong ling nguyen hinh, va yen can hang s6 ty 16 cua tdc dp sdng tdi bang hang s6 ty 16 ciia tdc dd sdng khilc xa, nghia la cd ciing mot hang so ty 16 v6 tdc dp truy6n sdng Tir (1.16) cd th6 thiy, dilu dd yeu cau XLS = K 0^'' A^ '.