Study And Application Discussion Of Potato Tuber Dynamic Mechanical Characteristics

Potato belongs to agricultural material, it was one of the most popular vegetables liked by customs. And it's nutrition was abundant and various, it's benefit was also remarkable in the industry processing. In most time such as harvesting, handling, and processing, potato was under the circumstance of dynamic load. It was necessity for us to study these actual mechanics characteristics by vibration method. In this paper, five representative Heilongjiang Province potato cultivars dynamic mechanical characteristics were researchedIn this paper, several experimental methods that were applied to potato dynamic mechanics characters were researched, designed and developed necessary test set up, collocated several testing system such as: sinusoidal alternative strain-stress test system, hammer impacting test, pellet impacting test. The wavelet coif5 was used for multiscale analysis denoise, the effect was extremely obvious and the processing speed was improved.Researched the theory that was used to deduced the dynamic parameters by sinusoidal alternative strain-stress test system, at the same time, the method characteristic extraction was researched. Strain-stress test was used to study the dynamic mechanics characteristics of cylinder sample within the frequencies 40-210 Hz. Different potato cultivars dynamic mechanics characteristics parameters of four varieties were educed, and the influence frequency preload excitation amplitude to dynamic mechanical characteristics of cylinder sample.The integrity potato dynamic parallel plate compress equation was derived by Hertz contect theory, and get the principal curvature radius between material and plate exactly by image analysis, dynamic parallel plate compress experiment was carried , some dynamic property parameters such as absolute dynamic modulus and loss angle of integrity potato, change rule between potato absolute dynamic modulus and exciting frequencies.The theory of integrity potato modal analysis was researched preliminary using impacting method, impacting test-data reduction and dynamic modal erecting and method getting modal parameters were deduced; Integrity potato impacting experiment was carried , within the frequencies 0-3000 Hz, get different varieties main response frequency curve , potato impacting model was established, get Da Xiyang main modal parameters of three steps, main response frequency, stiffness factor , damping factor. The relationship between potato impacting dynamic parameters and apparent strength and mass.