The Vibration Mechanics Model Of Tomato Stockage And Transportation And Model Analysis

The damage problem of storing and transporting fruit causes more and more concerns nowadays. Reducing damage is one of the important subjects for research, which is the modern agricultural technology. Tomato belongs to the berry vegetables which is apt to damage. The damage question in transportation is particularly outstanding. This paper is based on biomethanics, viscoplasticity theory, vibration mechanics, thing sexology theory of the fruits. It has studied the mechanism on tomato damaging deeply. Have introduced Maxwell model and Kelvin model in the classical model of viscoplasticity theory. Not only have compared the difference between them, but also have studied the setting-up feasibility of tomato Kelvin model. And according to the specific feature of tomato, revising for Kelvin model, have established the viscoplasticity vibration mechanics model of single tomato (4 unit model) and simplify, linear tomato vibration mechanics model. Have researched the causes that packing article impacts on tomato vibration.In the course of vibration system modeling of the whole basket of tomato, have adopted the modeling of testing as the main fact, theory modeling is a method to complement. It makes very good result in such a means. The mechanical modal analytical method is a testing method to prevail at home and abroad in recent years. This method is widely applied to the discernment of the modal parameter of bridge and the heavy -duty equipment. But still seldom apply to the try of fruit transportation system experiment modeling. This paper fully explains the principle of systematic mode debate on the basis of the impedance law of the acceleration. The experiment has adopted INV303/306 fictitious instrument system and DASP mode analysis software, knowing the modal damping, modal rigidity, mode quality of the system. Have set up the vibration mechanics model in the tomato transportation of seven freedom degrees. According to the gotten data , have made preliminary elaborate of tomato viscoplasticity and the nonlinear influence for mode parameters.In addition, in order to improve the practicability of the model, this paper has used the neural network model of RBF. This paper makes the acceleration mechanics impedance as the input of model, forsees mode parameters of systematic grey case, have obtained satisfied effect. This program has gotten expected results in studying the identification of mode parameters of tomato model. But because of the restriction of experiment, lacking further research for the influence of anisctropy, size, maturity, shape and the kind of tomato on mode parameters, the tentative idea in the following work is that increases influencing parameters and perfects model.Do the mechanical impedance of the acceleration as the introduction of the model. Predict to the modal parameter of system gray case, and have made the satisfactory result.