Tính toán ổn định của xuồng chữa cháy rừng tràm

NGHIEN COU-TRAO 061

TfNH TOAN 6 N 0!N H CUA XUONG CHU'A CHAY RLTNG TRAM

STABILITY CALCULATION OF MANGROVE FOREST FIRE FIGHTING BOAT

Dfldng Van Tai', Cao Hung Phi^ ThS. Nguyin Thai Van^

'Trfldng Dai hoc Lam nghiep

^Trfldng Dai hoc Sfl pham Ky thuat Vinh Long

T O M TAT

Riing tram d Viet Nam chu yeu tap trung d mien Tay Nam bd, ddy la loai riing ddc biet qui, dd

dUdc Lien hdp quoc xep vdo khu dU trU sinh quyen cua the gidi Do ddc diem ve thUc bi, ve thdi tiet nen

nguy cd chdy riing rat cao, ndm 2002 dd xay ra vu chdy riing tram lam mdt khoang 5000 ha. Viec chUa

chdy riing tram hien nay chii yeu la dung mdy bdm nUdc khieng tay, nen tinh cd dgngkhdng cao, hieu qud

chUa chdy riing thap. De tdi trgng diem cap Nhd nUdc KC07J3/06-10 da xay dUng dUdc cd sd ly thuyet

tinh todn dn dinh cua xuong chUa chdy riing trong cdc trUdng hdp hoat ddng ddc biet cua xudng dd Id: Khi

ngUdi vd cdc thiet bi lech sang mdt ben, khi xuong vUdt can de chuyen tii kenh ndy sang kinh khdc, khi

xuong quay vdng re nhdnh vdo kinh vudng gdc vd khi cdc thiet bi chUa chdy rUng tren xudng hoat ddng.

De tdi da sii dung ly thuyet tinh todn dn dinh ndy vdo thiet ke che tao ra xudng chUa chdy riing tram, ket

qud khdo nghiem cho thay xudng cd tinh cd ddng cao, nhanh chdng tiep can ddm chdy vd on dinh trong

moi trUdng hdp hoat ddng ciia xudng.

Tfl khda: Xuong chUa chdy riing; ChUa chdy riing tram; On dinh xudng chUa chdy riing; On dinh

xudng vUdt can.

ABSTRACT

Mangrove forest in Vietnam is mainly located in the southwest. This is very valuable forest, is being

classified by UN as a biosphere reserve of the world. Due to the vegetation and weather, the risk of forest

fire is very high. In 2002, about 5000 hectares of mangrove forest lost because of fire. Currently, mangrove

forest fire fighting work is done mostly by using hand carried water pumps that have low portability and

efficiency of forest fire fighting. The state level mam project KC07.13/06-10 has established a theoretical

basis of stability calculation offorest fire fighting boat in special activity cases: people and equipments are

at a same side; the boat move from canal to another canal; the boat rotate and move to perpendicular

canal; equipments in boat works. The research has applied theory of stability calculation into designing

and manufacturing a mangrove forest fire fighting boat The test results show that the boat has high

mobility, rapid access to fire places and stability in all operation cases of boat

Keywords: Forest fire boat; Mangrove forest fire fighting; Forest fire fighting boat stabilization

TAP CHi CO KHi VIET NAM, Sd 12 nam 2013