KHOA HQC - CONG \ G H $ DANH GIA DO BEN CUA CAC CHI TIET VA DO EM DIU CUA XE CHiTA CHAY RUING DA NANG ^ 'sT ^ i '' Nguyin Xd Hgi', Duong Van Tdi ^, Nguyin Vdn Bi ^ TOM TAT Bdi bdo giai thieu kit qud ddnh gid dp ben cua cdc chi liet vd da em diu cua xe chua chdy rimg da ndng Tit kit qud khdo sdt dao dong cua xe chiia chdy rimg da ndng se ddnh gid duac ben cua cdc chi tiit theo he so tdi trgng dgng k^ vd ddnh gid duac dg em diu chuyen dgng cita xe theo gid tri binh phucmg trung binh gia toe dao dpng thdn xe Tit khda: Kit qud khdo sdt dao dong xe chiia chdy rimg da ndng; H$ so tdi dgng; Do em diu cua xe EVALUATION OF THE DURABILITY DF THE DETAILS AND RIDE COMFORT OF MULTIPURPOSE FOREST FIRE FIGHTING VEHICLE Nguyen Xa Hoi', Duong Van Tai ^, Nguyen Van Bi ^ SUMMARY The article presents the evaluation results of the durability of the details and ride comfort of multipurpose forest fire fighting vehicle From thefluctuationsurvey results of multipurpose forest firefightingvehicle, it can evaluate the durability of the detmls under dynamic load coefficient kj and the ride comfort of vehicle under the mean square value in acceleration of a movement of vehicle body Keywords: The fluctuation survey result of the multipurpose forest fire fighting vehicle; Dynamic load factor; Ride Comfort of vehicle I &^T VAN DE Xe chtta chay rimg da nang sau thiet ke, che tao xong buac dau qua khao nghiem da co the chua chay rung dugrc nhimg diSu kien cu the Tuy nhien thiet bi van mpt so ton tai can phai nghien cmi giai quydt la: Khi xe hoat dong chua chay khu rimg khong CO duong, duoi tac dong cua cac map mo mat dat rung, cac vat can tren duong di, tac dong ciia cac he thong cong tac chiia chay tren xe lam cho xe dao dong rat lon, dao dpng anh huong den on dinh, d6 b§n cua cac chi tiSt tren xe va em diu cua xe De dam bao dp ben cho cac chi tilt tren xe ' ThS TiTTcmg Dai hpc Ph6ng chay chQa chay ^ TS Tru&ng Dai hgc Lam nghilp ^ TS Hpi Khoa hoc Lam nghifip Viet Nam 36 va dp em diu ciia xe, can thi§t phai danh gid theo cac chi tieu dpng luc hpc la he so tai trpng dpng kj va gia tri binh phuong trung binh gia toe dao dpng than xe de ttr tim duoc che dp lam viec hpp ly cua xe chua chay rimg da nang II BOI TU'gfNG VA PHU'aNG PHAP NGHIEN c i r u 2.1 Doi tvprng va thiet bi nghien CIJU D6i tuprng nghien cuu la danh gia dp bin cua cac chi tiet va dp em diu cua xe chiJa chay rimg da nang xe hoat dpng chua chay rimg Thiet bi nghien cuu la xe chiia chay rung da nang 2.2 Phmmg phap nghien cihi Phuong phap nghien cuu la ap dung cac chi tieu dpng luc hpc de danh gia dp ben v^ dp em diu cua xe TAP CHi CONG NGHIEP NONG THON • SO 10 - 2013 KHOA HOC - CONG NGHE HI KtT QUA VA THAO LU^N 3.1 Cac chi tiSu danh gia dong lire hgc xe chira chay rfrng da nang Xe chiia chay rimg da nang dupc thiet ke, che t^o dua tren nln xe Ural nen cac chi tieu dpng lire hpc ciia xe, ciing giong nhu cua cac loai 6t6 va may keo banh hoi khac Cac chi tieu duoc danh gia blng he s6 tai trpng dpng kj va dp em diu cita xe Viec khao sat cac chi tieu nhlm muc dich danh gia kha nang lam viec va tinh on dinh, an toan cua xe, tir d6 co the xac dinh dupc che dp lam vipc hop ly cua xe chiia chay rimg da nang 3.1 / He so tdi dong Theo [4], he so tai trpng dpng kd dupc xac dinh theo cong thirc sau: m(z+g)_ mg - = \^g (1) Trong do: m - Khfii lugng toan bp cua xe, kg; z - Gia t6c cua xe, m/s^; g - Gia t6c trpng trucmg, g = 9,81 m/s^ DS dp hhn cua cac chi tiet tren xe chiia chay rimg da nang dugc dam bao thi yeu cau he s6 tai dong phai thoa man dieu kien nhu voi cac loai oto, may keo khac [4] : kd