FINITE ELEMENT AND APPLIED MODELS OF THE STEM WITH SPIKE DEFORMATION.

Considered by this article are static and dynamic deformation of the stem with the ear of wheat and of the individual grain. The purpose of the article is to determine the factors of influence on the ear of wheat to isolate the grain The ear fluctuations are considered within the Euler-Bernoulli bar theory. The first stage studies the dynamics of the plant as a whole, the second stage studies the dynamics of an individual grain in a moving system associated with the ear. The model of the ear and the grain fluctuation uses the mechanical characteristics of elastic bonds and elastic bodies, which are determined by spring stiffness's, elastic moduli, etc. The natural frequencies shows that at the value of natural frequencies of grain fluctuations 131,6 Hz and 1274,9 Hz the grain itself fluctuates predominantly, and at frequencies 1622,8 Hz, 7367.3 Hz, 9396.0 Hz and 13491,0 Hz the flakes vibrate. [ABSTRACT FROM AUTHOR]