TESTING THE RESISTANCE STRUCTURES OF TRACTORS AND AGRICULTURAL MACHINERY UNDER SIMULATED AND ACCELERATED REGIME
AbstractThe need for an increased quality of products, the reduction of the production entry time and the restrictions imposed by the service period of products are the essential reasons which impose the necessity of using the simulated and accelerated regime tests. An accelerated test is necessary to produce the same content of wear deterioration as that one supported by the product (machine, gear, subsystem or component) on its lifetime in normal functioning conditions. Although a test in accelerated regime doesn`t have to produce big loads, unrealistic, which could alter the defecting mechanism? The paper presents the principal methods of test acceleration and exemplifies the test in accelerated and simulated regime by a test of endurance effectuated on the structure of a two plough body, on the Hydropulse stand inside of Testing Department from INMA Bucharest. Also, the paper present photos that were taken during the years from tests in simulated and accelerated regime, on the Hydropulse stand, of different machines and agricultural gears.
De Vries A., 2006 - Economic Value of Pregnancy in dairy cattle. J. Dairy sci. 89: 3876-3885.
Groenendaal H., Galligan D. I. and Mulder N. A., 2004 - An economic spreadssheet model to determinate optimal breeding and replacement decision for dairy cattle. J. Dairy, Sci. 87: 2146-2157.
Gümen A., Guenther J.N. and Wiltbank M.C., 2003 â€“ Follicular size and response to ovsynch versus detection of estrous in anovular and ovular lactating dairy cows. J. Dairy Sci. 86: 3184-3194.
Inchaisry C, De Vries A., Jorritsma R. And Hogeveen H., 2012 â€“ Improved knowledge about conception rates. Influences the decision to stop insemination in dairy cows. Reprod. Dom. Anim 47: 820-826.
Lopez N., Satler L and Wiltbank M.C., 2004 â€“ Relationship between level of milk production and estrous behavoir of lactating dairy Cows. Animal Reproduction Science. 81: 209-223.
Meadows C., Rajala â€“ Schultz P. J., Frazer G.S., 2005 â€“ A speadsheet-based model demonstrating the nonuniform economic effects of varying reproductive performance in Ohio dairy herds. J. Dairy Sci., 88: 1244-1254.
Pursley J.R. and Wiltbank M.C., 2004 â€“ Relationship between level of milk production and estrous behavoir of lactating dairy cows treated with exogenous progesterone during ovsynch.J. of Dairy Sci. (Midwest Branch ADSA Meetings, Des Moines IA.Abstract 251 p 63.