Dao động của hệ thống làm băng cách ly đám cháy trên xe chữa cháy rừng đa năng

NGHIEN ClJfU - TRAO D6 |

DfiO Ddm CUfi HE THONQ WM B6NG CfiCH LY DflM CHfiY

TREM XE CHfiffl CH^Y RCTNG Dfi NRNG

Ths. Nguyen Xa Hdi', TS. DdPng Van Tdi^

^Trddng Dai hpc Phdng chdy Chda chdy ^Trddng Dai hpc Ldm nghiep

TOM TAT

He thdng ldm bdng cdch ly ddm chdy tren xe chUa chdy rUng da ndng hoat ddng theo nguyen ly

cdt dang bua, nen khi ldm viec cho ndng sudt vd chdt lUdng bdng cdch ly cao. Song tdn tai Idn do Id rung

ddng cua he thdng rdt Idn, tU dd dnh hUdng din do ben cdc chi tilt vd dao ddng cua xe. Bdi bdo ndy gidi

thieu kit qud tinh todn dao ddng cua he thdng bao gdm: md hinh dao ddng, phUdng trinh vi phdn dao

ddng cua he thdng vd cdc gidi phdp chdng rung ddng cho he thdng Kit qud nghien cdu dd dUdc Ung dung

detinh todn thilt kl chi tao xe chUa chdy rdng da ndng.

Tii khoa: Dao ddng he thdng ldm hdng cdch ly; Xe chda chdy rUng da ndng; Dao ddng cdt dang

bua; Dao ddng cua xe chda chdy rUng

ABSTRACT

The firebreak system mounted on multi-functional forest fire fighting vehicle operates following

the principle of hammer-typed cutting, so it has high productivity and quality of firebreak. However, the

big weak point of this system is its high vibration that affects the durability ofworkpiece and tool as well

as the vibration of vehicle. This paper introduces the results of calculation about vibration of the system

including: vibration model, vibration differential equation of the system and solutions against the vibra￾tion for the system. The research result has been applied to calculate and design and manufacture forest

fire fighting vehicle.

Keywords: the vibration of firebreak construction system; multi-functional forest fire fighting ve￾hicle; hammer-typed cutting vibration; forest fire fighting vehicle.

1. DAT VAN DE PhdPng phdp chda chdy rdng hieu qud

nhat hien nay Id ldm bang cdch ly khoanh vung

6 Viet Na^n, hdng ndm van xdy ra hdng cd lap ddm chdy, song vile ldm bdng hien nay chu

tram vu chdy rdng, dd ldm mat hdng ngdn ha ylu bang dao, cude, xeng nen ndng suat vd chat

rifng, thiet hai vl kinh tl hdng trdn ty ddng, dnh ldpng bdng rat thap khdng ddp dng ddpc yeu cau

hddng xau din mdi trddng sinh thdi. Hien nay, cua cdng nghe chda chdy rdng.

thilt hi chda chdy rdng cdn han chi, chu ylu Id

dung cdnh Id dap, mdt sd noi sd dung nddc, song De tdi trpng dilm cap nhd nddc "Nghien

hieu qud chda chdy rdng rat thap. cdu cdng nghe vd thilt kl che tao cdc thilt bi

TAP CHf CO KHI VIET NAM •t* Sd 1 +2 (Thdng 1+2 nam 2012)