Ap dung ly thuyet bo tat chan dong luc trong bao ho lao dong, Nguyen Van Khang, Nguyen Anh Tuan

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AP DNG LY THUYT B TT CHN NG LC
TINH TOAN GIM RUNG CHO MT VAI MO HINH C-SINH HC
TRONG BO H LAO NG


Applying the Theory of Dynamic Vibration Absorber for Vibration
Reduction Calculation of Some Biomechanical Model
In Occupational Safety




GS. TSKH. Nguyn Vn Khang1*;
TS. Triu Quc Lc2, ThS. Nguyn Anh Tun2
1Trng H Bach Khoa Ha Ni, 2Vin Nghien cu KHKT Bo h lao ng
1HaNoi University of Science and Technology, 2National Institute of Labour Protection




ABSTRACT

This paper refer to the study of applying dynamic vibration absorber to reduce the
effects of vibration on human body, based on the oscillator model of human body as a
mechanical- biological system. Using the theory of constrained non-linear programming to
calculate the parameters of dynamic vibration absorber installed in oscillatory system with
many degrees of freedong, significantly reducing vibration effects caused by structures and
trangsports on human body, then buiding a scientific basis for desingning vibration-reduction
mechanism and equipment in occupational safety.

I. T VN
Cac may moc thit b trong sn xut cng nh cac phng tin giao thong vn ti
trong qua trinh hot ng thng sinh ra nhng dao ng mnh, c bit i vi cac may
moc, thit b lam vic vi hanh trinh ln va vn tc cao. Nhng dao ng nay di dng song
c (gm song dc va song ngang) c truyn trc tip ti con ngi hoc qua cac b phn
ca may, xung b may, san nha va ti c th con ngi, lam cho c c th hoc tng b phn
c th dao ng theo, gay ra nhng bin i v tam sinh ly trong c th va la nguyen nhan s
xut hin cac bnh rung nh: ri lon thn kinh, lit va teo c, gay nhng tn thng v
xng khp ... [1 - 5]. Tu thuc vao mt s yu t nh: thi gian tip xuc vi ngun rung, v
tri tac ng, c tinh ngun rung, va gia tr ca cac i lng ng lc c trng cho rung
ng (tn s, bien , vn tc va gia tc) ma nh hng ca rung ng ti c th con ngi s
rt khac nhau.
Trong bai bao nay cp ti vic nghien cu ap dng b tt chn ng lc gim
nh hng ca rung ng len c th ngi tren c s mo hinh dao ng ca c th ngi nh
mt h C-Sinh hc [4 - 10]. S dng ly thuyt quy hoch phi tuyn co rang buc [11 - 13]
tinh toan cac tham s ca b tt chn ng lc lp t vao h dao ng nhiu bc t do lam
gim ang k hiu ng rung do cac c cu va cac phng tin giao thong tac dng len c th
con ngi. T o xay dng c s khoa hc phc v cho vic thit k cac c cu va dng c
gim rung trong bo h lao ng.