- Email: [email protected]
Patent specifications
118
ABSTRACTS 112. ~llovlch,
V.¥a,
Metod rascheta
kolebanii
skorosr~nykh traktorov
pri
y e z d e po n e r o v n o s t y a m
(Method for calculating the vibrations of high-speed tractors moving over uneven surfaces)
Trakt. i SelkhMash., 1963, 33, I2. Equations are developed to express the input signal (disturbance transmitted t o wheel o r t r a c k by s u r f a c e u n e v e n n e s s ) a n d t h e o u t p u t s i g n a l ( a c c e l e r a t i o n imparted to tractor frame and driver's seat) and amplitude/frequency data are calculated f o r movements a n d a c c e l e r a t i o n s o f p o i n t s on t h e f r a m e a n d s e a t in t h e c a s e o f w h e e l e d a n d t r a c k - l a y i n g tractor.s.
(N.I.•.E.)
113. ~ o v ,
V.F. and Sairnov,A.S. " Determination of soil resistance against the motion of vehicles travelling on pneumatic tyres", Pron. Int. Conf. Soil Mech. and Fdh . Engr.
Sept,. 1963, Hungarian Academy o.f Sctences. The p a p e r e s t a b l i s h e s a relationship between the rolling istics obtained from a dynamic penetrometer. The e f f e c t s physical characteristics is also dealt with.
114. I}allarl,F.
resistance of weather
and s o i l c h a r a c t e r c o n d i t i o n s on s o i l
" Trasporti agricoli in zone collinar£" (Farm transport in hilly areas -
Machine • Mot. Agric., 1961, 19. T r i a l s w e r e c o n d u c t e d w i t h an 18 h . p . w h e e l e d t r a c t o r a n d p o w e r - d r i v e n t w o - w h e e l e d t r a i l e r o f 2 , 0 0 0 k g . c a p a c i t y on 1 9 - 2 0 $ g r a d i e n t s , w i t h v a r i o u s l o a d s s a d on v a r i o u s s u r f a c e s , w i t h a n d w i t h o u t c h a i n s on t h e t r a c t o r d r i v i n g w h e e l s . llS. D i l g , lL Untersuchungen ~ber das Schwingungsverhalten des Schleppers BS 14/30 und des
Ger~tetr~gers. a.s 09 (Studies on the vibration characteristics of the as 14/30 tractor and the aS 09 implement carrier), Dt.Agrart,cch., 1961, II (3). The m o v e m e n t s o f 2 t r a c t o r s
of different
design
travelling
o v e r an o b s t a c l e
6 cm h i g h x
20 cm wide were recorded by fixing light bulbs at the centre of gravity, the wheel hubs and the driver's s e a t a n d p h o t o g r a p h i n g t h e i r p a t h i n d a r k n e s s w i t h a c a m e r a whose l e n s was c o v e r e d a t f i x e d i n t e r v a l s by a r o t a t i n g screen. Speeds and tyre pressures were varied. V i b r a t i o n a m p l i t u d e s and f r e q u e n c i e s w e r e c a l c u l a t e d from the light traces. (N.I.A.E.) 1 1 6 . F i s e r , Z. V l i v n a h u s t e n ~ a z a t ~ z e n f p n e u m a t i k n a t a h o v ~ v l a s t n o s t i t r a k t o r u Z e t o r SO S u p e r v mokr~ j ~ l o v i t ~ pude (Effect of inflation pressure and loading of pneumatic tyres on t h e t r a c t i o n characteristics o f t h e Z e t o r SO S u p e r t r a c t o r on w e t c l a y s o i l ) Zeroed.
Tech., 1963, 9 (4). The c a a r a o t e r i n t i c relationships of tyres are discussed analytically. Experiments were c a r r i e d o u t on s o i l o f d i f f e r e n t s.c. using 13-28, 14-28, 13-30 and 14-30 tyres with or w i t h o u t wheel w e i g h t s o r w a t e r b a l l a s t at inflation p r e s s u r e s o f 0 . 8 , 1 . 0 , 1 . 4 a n d 2 . 0 arm. The D.B. p u l l a n d t r a c t i o n e f f i c i e n c y were determined in relation t o r a d i a l l o a d , s l i p and contact area between tyre and soil. A 14-28 wide-base tyre gave the beat r e s u l t s . (N.I.A.E.)
117. Frmke, a.
" Der Allradantrieb fur Ackerschlepper" (4-Wheel drive for farm tractors),
Lmzdtechnik, 1963, No. 18. Ideal weight distribution on the axles of s 4-wheel drive tractors for maximum D.B. pull, s t e e r i n g p r o b l e m s a r i s i n g from t h e s m a l l a n g l e o f l o c k w h e r e f r o n t a n d r e a r w h e e l s a r e o f t h e same s i z e , a n d a ~ p l i c a t i o n s o f f r a m e and s k i d - s t e e r i n g are discussed. 118. 6reen, A.J., ~aae,$.L. and Murvay, N.a., " Stresses under moving vehicles : Distribution of stresses on an u n y i e l d i n g s u r f a c e b e n e a t h s t a t i o n a r y and towed pneumatic tires", U.S.Army
Engr. ~at,erway$ Ezpt,. Stn. Tech. Repor~ No.3-5/~5, 4, July 1964. This report presents results of tests to determine the magnitude sad distribution of stresses b e n e a t h s e v e r a l t y p e s o f p n e u m a t i c t i r e s on an u n y i e l d i n g s u r f a c e . T w e n t y - n i n e tests were performed, in which stresses were m e a s u r e d u n d e r s i x t i r e s , differing in size, shape, and construction, at the points of concoct with a firm surface. Five tires were t e a t e d a t one l o a d and f o r w a r d s p e e d , f o u r o f them a t two i n f l a t i o n pressures or deflect i o n s a n d one a t t h r e e i n f l a t i o n pressures. The o t h e r a n d l a r g e s t t i r e ( 1 1 . 0 0 - 2 0 , 12-PR) was t e s t e d a t t h r e e l o a d s and s t t h r e e d e f l e c t i o n s for each load while both rolling forw a r d a n d s t a n d i n g . The d a t a showed a zone o f h i g h s t r e s s e s n e a r t h e e d g e s o f t h e t i r e contact area, the magnitude of the stresses increasing with wheel load, inflation pressure, and sidewall stiffness. Increase in inflation pressure significantly increased the magnitude of t h e s t r e s s in t h e c e n t r e o f t h e c o n t a c t a r e a . The s t i f f e r tires distributed the load l e s s e v e n l y . I t i s r e c o m m e n d e d t h a t ( a ) The i n v e s t i g a t i o n of interface stress distribution on u n y i e l d i n g s u r f a c e s be s u s p e n d e d u n t i l t i r e s h a v i n g c h a r a c t e r i s t i c s different from t h o s e t e s t e d become a v a i l a b l e . (b) A sufficient number o f t e s t s be c o n d u c t e d t o d e v e l o p s working knowledge ,oi the tire-soil interface stresses i n d u c e d by towed and p o w e r e d p n e u m a t i c w h e e l s in s o f t s o i l s .
ABSTRACTS 112. ~llovlch,
V.¥a,
Metod rascheta
kolebanii
skorosr~nykh traktorov
pri
y e z d e po n e r o v n o s t y a m
(Method for calculating the vibrations of high-speed tractors moving over uneven surfaces)
Trakt. i SelkhMash., 1963, 33, I2. Equations are developed to express the input signal (disturbance transmitted t o wheel o r t r a c k by s u r f a c e u n e v e n n e s s ) a n d t h e o u t p u t s i g n a l ( a c c e l e r a t i o n imparted to tractor frame and driver's seat) and amplitude/frequency data are calculated f o r movements a n d a c c e l e r a t i o n s o f p o i n t s on t h e f r a m e a n d s e a t in t h e c a s e o f w h e e l e d a n d t r a c k - l a y i n g tractor.s.
(N.I.•.E.)
113. ~ o v ,
V.F. and Sairnov,A.S. " Determination of soil resistance against the motion of vehicles travelling on pneumatic tyres", Pron. Int. Conf. Soil Mech. and Fdh . Engr.
Sept,. 1963, Hungarian Academy o.f Sctences. The p a p e r e s t a b l i s h e s a relationship between the rolling istics obtained from a dynamic penetrometer. The e f f e c t s physical characteristics is also dealt with.
114. I}allarl,F.
resistance of weather
and s o i l c h a r a c t e r c o n d i t i o n s on s o i l
" Trasporti agricoli in zone collinar£" (Farm transport in hilly areas -
Machine • Mot. Agric., 1961, 19. T r i a l s w e r e c o n d u c t e d w i t h an 18 h . p . w h e e l e d t r a c t o r a n d p o w e r - d r i v e n t w o - w h e e l e d t r a i l e r o f 2 , 0 0 0 k g . c a p a c i t y on 1 9 - 2 0 $ g r a d i e n t s , w i t h v a r i o u s l o a d s s a d on v a r i o u s s u r f a c e s , w i t h a n d w i t h o u t c h a i n s on t h e t r a c t o r d r i v i n g w h e e l s . llS. D i l g , lL Untersuchungen ~ber das Schwingungsverhalten des Schleppers BS 14/30 und des
Ger~tetr~gers. a.s 09 (Studies on the vibration characteristics of the as 14/30 tractor and the aS 09 implement carrier), Dt.Agrart,cch., 1961, II (3). The m o v e m e n t s o f 2 t r a c t o r s
of different
design
travelling
o v e r an o b s t a c l e
6 cm h i g h x
20 cm wide were recorded by fixing light bulbs at the centre of gravity, the wheel hubs and the driver's s e a t a n d p h o t o g r a p h i n g t h e i r p a t h i n d a r k n e s s w i t h a c a m e r a whose l e n s was c o v e r e d a t f i x e d i n t e r v a l s by a r o t a t i n g screen. Speeds and tyre pressures were varied. V i b r a t i o n a m p l i t u d e s and f r e q u e n c i e s w e r e c a l c u l a t e d from the light traces. (N.I.A.E.) 1 1 6 . F i s e r , Z. V l i v n a h u s t e n ~ a z a t ~ z e n f p n e u m a t i k n a t a h o v ~ v l a s t n o s t i t r a k t o r u Z e t o r SO S u p e r v mokr~ j ~ l o v i t ~ pude (Effect of inflation pressure and loading of pneumatic tyres on t h e t r a c t i o n characteristics o f t h e Z e t o r SO S u p e r t r a c t o r on w e t c l a y s o i l ) Zeroed.
Tech., 1963, 9 (4). The c a a r a o t e r i n t i c relationships of tyres are discussed analytically. Experiments were c a r r i e d o u t on s o i l o f d i f f e r e n t s.c. using 13-28, 14-28, 13-30 and 14-30 tyres with or w i t h o u t wheel w e i g h t s o r w a t e r b a l l a s t at inflation p r e s s u r e s o f 0 . 8 , 1 . 0 , 1 . 4 a n d 2 . 0 arm. The D.B. p u l l a n d t r a c t i o n e f f i c i e n c y were determined in relation t o r a d i a l l o a d , s l i p and contact area between tyre and soil. A 14-28 wide-base tyre gave the beat r e s u l t s . (N.I.A.E.)
117. Frmke, a.
" Der Allradantrieb fur Ackerschlepper" (4-Wheel drive for farm tractors),
Lmzdtechnik, 1963, No. 18. Ideal weight distribution on the axles of s 4-wheel drive tractors for maximum D.B. pull, s t e e r i n g p r o b l e m s a r i s i n g from t h e s m a l l a n g l e o f l o c k w h e r e f r o n t a n d r e a r w h e e l s a r e o f t h e same s i z e , a n d a ~ p l i c a t i o n s o f f r a m e and s k i d - s t e e r i n g are discussed. 118. 6reen, A.J., ~aae,$.L. and Murvay, N.a., " Stresses under moving vehicles : Distribution of stresses on an u n y i e l d i n g s u r f a c e b e n e a t h s t a t i o n a r y and towed pneumatic tires", U.S.Army
Engr. ~at,erway$ Ezpt,. Stn. Tech. Repor~ No.3-5/~5, 4, July 1964. This report presents results of tests to determine the magnitude sad distribution of stresses b e n e a t h s e v e r a l t y p e s o f p n e u m a t i c t i r e s on an u n y i e l d i n g s u r f a c e . T w e n t y - n i n e tests were performed, in which stresses were m e a s u r e d u n d e r s i x t i r e s , differing in size, shape, and construction, at the points of concoct with a firm surface. Five tires were t e a t e d a t one l o a d and f o r w a r d s p e e d , f o u r o f them a t two i n f l a t i o n pressures or deflect i o n s a n d one a t t h r e e i n f l a t i o n pressures. The o t h e r a n d l a r g e s t t i r e ( 1 1 . 0 0 - 2 0 , 12-PR) was t e s t e d a t t h r e e l o a d s and s t t h r e e d e f l e c t i o n s for each load while both rolling forw a r d a n d s t a n d i n g . The d a t a showed a zone o f h i g h s t r e s s e s n e a r t h e e d g e s o f t h e t i r e contact area, the magnitude of the stresses increasing with wheel load, inflation pressure, and sidewall stiffness. Increase in inflation pressure significantly increased the magnitude of t h e s t r e s s in t h e c e n t r e o f t h e c o n t a c t a r e a . The s t i f f e r tires distributed the load l e s s e v e n l y . I t i s r e c o m m e n d e d t h a t ( a ) The i n v e s t i g a t i o n of interface stress distribution on u n y i e l d i n g s u r f a c e s be s u s p e n d e d u n t i l t i r e s h a v i n g c h a r a c t e r i s t i c s different from t h o s e t e s t e d become a v a i l a b l e . (b) A sufficient number o f t e s t s be c o n d u c t e d t o d e v e l o p s working knowledge ,oi the tire-soil interface stresses i n d u c e d by towed and p o w e r e d p n e u m a t i c w h e e l s in s o f t s o i l s .