NGHIEN c t r u VE DQ BEN NITT RAN (Kic) CUA VAT LIEU KHUNG GlA CHUYEN HU^ONG DAU M A Y D19E VAN DUNG TAI XI NGHIEP DAU M A Y H A NOI ThS NCS PHAM LE TIEN Trudng Cao diing nghi Dudng sdt Tdm tilt: Trong bdi bdo ndy trinh bdy cdc kit qud nghien cim bdng thitc nghiem: xdc dinh mdc ihep che tao khung gid chuyin hitdng, xdc dinh bin mil ran Kjc tinh todn du bdo tudi thg xudt hien vet niet co chieu ddi khde cho khung gid chuyin hudng ddu mdy D19E Summary: This paper presents some experimental research results: determining steel type for direction changed fi-ame manufacture, defining cracked factor KIC calculating the life prediction when crack appeared, that has various length for DI9E locomotive direction changed frame I D A T VAN DE Hien tugng mit mdi cac khung gia chuyen hudng (KGCH) dau may D19E dang van dung tren dudng sat Viet Nam da dugc chi ro tai lieu [9], hinh Hidn trang mit mdi dugc khac phuc bang vide gia cudng cac tam tap phu va han lai Tuy nhien, sau van dung mdt thdi gian, sy mit mdi lai xay d nhung vj tri khac trdn K G C H [5, 6, 7] Chu trinh nirt - han - chay - niit - han - chay lap di lap lai Vi du, 06 thang nam 2010, mdt vet nirt mdi dugc phat hien mgt khung gia chuyen dau may D19E 907, d i n den diu may phai tam ngirng van dung y, / ITuih Vel nirt moi xuai hien Iren khung gia cliiivin hitong dun nn'n DI9E 906 Tap:chi::KHOA HQC:ctatui « h o m e S|yuuiiL«i) Pdidint(((((((l-0.72))*23.02)-0.257))/((((8.17)*(10)^(-3))*(0.257)^3.38)),%x = 0.00003 0.0181)); 1.35130863510" - Khi diu may van hanh ldn deo kdt hgp vdi di vao dudng cong ban kinb nhd: >int(((((((l-0.54))*23.02)-0.582))/((((8.17)*(10)T3))*(0.582)^3.38)),%x = 0.00003 0.01)); 7.609322544 lO" Sd ehu ky tai trgng d muc eao eua KGCH dau may D19E, theo sd lieu ciia Xi nghidp diu may Ha Ndi da tinh trung binh eho mdt nam vao khoang Nvandung = 2,5.105 Vay sd ehu ky tai trgng (hay tudi thg mdi tinh theo sd chu ky iing suit hoae sd chu ky tai trgng) eiia KGCH diu may D19E d Xi nghidp diu may Ha Ndi nam khoang bdn lau da tinh toan 6ugc Nhung ket qua dy bao tudi thg hoan toan tuang thich vdi cac kdt qua tinh toan he sd an toan mdi cac bai [11, 12] 136 «T£ip chi KHQAHpC;GIAO,THQNG.:V4NMii;:;:M'^B^ QMXO IV KET LUAN Mae dil tudi thg tinh toan theo phuong trinh lan truyen vet mit (6) ung vdi van tdc chay tau khoang (15-30) km/b, cbi vdi trudg hgp r>0, eho kdt qua tudi thg cao (cd ve nhu phii hgp vai ket luan an toan moi eiia nha san xuit [5, 6]), song, ehua phan anh hdt dugc anh hudng CLia cac chd tai trgng cdn lai cd r = var va ed sd gia irng suat ldn Aamax, vdi eac dai van tdc chay tau khac nhau, dd can phai tiep tuc md rdng vide tinh toan tudi thg eiia KGCH vdi toan bd CO sd du lieu ma eac phia Trung Qudc va Viet Nam da dde lap duge [5, 6, 7] Tir phuong trinh (6), thay ro rang, ndu.r< tdc lan truydn vdt nut se giam, nhung ndu r > va AK > thi ro rang tdc lan truydn vdt nut se tang manh liet ban, nghTa la thdi gian dat tdi Ic se ngan hon, tire la KGCH se mau ehdng bj pha buy ban Didu phu hgp vdi kdt luan nghien cuu [9] vd he sd an toan mdi eua KGCH eua ehung tdi Tudi thg mdi eiia KGCH cd kdt eau hidn hanh se rat ngan, ndu nd phai lam vide vdi vung tdc (45-90) km/h, eac chd tai trgng ed r > va AK > va cd trj sd ldn Khi dau may van hanh d vimg ddng bang, dudng tuong ddi phang, sy tap trung irng suat tai eac vimg nguy hidm va nhay cam giam nhd ndn tudi thg mdi eiia nd ldn hon dau may van hanh ldn deo kdt hgp vdi di vao dudng cong ban kinh nhd [9] Tai lieu tham khao [1] Ngd Vdn Quyit Nhap mdn Co hpc pha buy "Hoi co hoc Viet nam" Ha Noi, 1987, 224 trg [2] Ngd Vein Quyit Co sd ly thuySt mdi NXB Giao due, Ha Npi, 2000, 272 trg [3] Khudt Tai NIntang Ky thuat diu may toa xe hien dai Dai hpc Giao thdng Van tai, tap 1, Ha Npi, 2002, 232 trg [4], Ngd Tri Phiic, Trdn Vdn Dich S6 tay sii' dung thep thg gidi NXB Khoa hpc va Ky thuat Ha Npi, 2003 [5] Test and Analysis Report on D19E 903 and D19E 907 locomotives Locomotive and Rolling Stock Research Instimte, CARS; Locomotive and Rolling Stock Research Institute, SWJTU.Ziyang Locomotive Works, CSR,2003,.18p [6] Analysis Report on Strength of Renforced Frame of Meter-Gauged Diesel Locomotive For Vietnam Railways CSR Ziyang Locomotive Works, June 2003, 9p [7] Nguyin Manh Thdnh, Trdn Tudn Nam Bao cao ket qua kiem tra va danh gia trang thai li'ng suatbign dang dpng tren kliung gia chuydn hudng diu may D19E 903 va D19E 907 Vien Co' hpc Ha Npi, 2003 48 ttg [8] PP - ASTM E 399-90 Phuong phap xae dinh dp pha huy bign dang phing ciia vat lieu kim loai "HTLM-Institute of energy and Mining Machines " Ha Npi, 2005 [9] Ngd Vdn Quyit, Dd Dice Tudn, Phgm Li Tien Nghien cuu hien tugng nut khung gia chuyen hudnCT cua loai diu may D19E van dung d Xi nghiep Dau may Ha Npi Tap chi Khoa hpc Giao thong Van tii, sd 12/thang 11/2005, ttg 165-170 [10] Ngd Van Quvit, Do Ditc Tudn, Pham Li Tiin Ve phuong trinh lan truyen vet niit mdi Tap chi Khoa hpc Giao thong Van tai, s6 12 /thang 11/2005, ttg 217 - 231 • rap Chi KHOA HQC GIAO THONG VAN TAI So 3;|-09/2Q10 137 ... kiem djnh, cd thd kdt luan: vat lieu lam dd da giam chin va vat lieu lam xa doc ciia khung gia chuydn dau may D19E la vat lieu cd ky hidu Q345A ciia Trung Qudc theo bang b Xae djnh cac dac trung... lieu, didu kidn lam vide, duge ehi rd tai lieu [2, 10] 3.2 Du bao tuoi tho ciia khung gia chuyen huong d i u may D19E nho'' phuong trinh lan truyen vet nut moi Tir phuong trinh lan truydn vdt nut... dung thep thg gidi NXB Khoa hpc va Ky thuat Ha Npi, 2003 [5] Test and Analysis Report on D19E 903 and D19E 907 locomotives Locomotive and Rolling Stock Research Instimte, CARS; Locomotive and