Estimation of economic life and feasibility of combine harvesters in Bangladesh deploying a unique web-based app

Akter, Habiba; Ali, Md. Rostom; Alam, Md. Shahinur; Sarker, Tumpa Rani; Ahamed, Sahabuddin; Saha, Chayan Kumer

doi:10.1016/j.atech.2023.100378

Cited by 1 publication

(2 citation statements)

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“…According to the boundary conditions of the combine harvester in practice, combined with the classical thin plate theory, it can be seen that if the boundary of the thin plate is a simply supported edge, i.e., regardless of whether it can slide in the horizontal direction or not, the deflection as well as the bending moment at each point on the edge of the plate is zero. In the rectangular coordinate system, the boundary conditions are shown in Equation (1).…”

Section: Equivalent Modeling Of Plate and Shell Structuresmentioning

confidence: 99%

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Vibration Response of Metal Plate and Shell Structure under Multi-Source Excitation with Welding and Bolt Connection

Ding,

Tang,

Zhang

et al. 2024

Agriculture

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There are many excitation sources and complex vibration environments in combine harvesters. The coupling and superposition of different vibration signals on the plate and shell seriously affect the working parts of the body. This also reduces the reliability of the whole machine. At present, domestic and foreign research on existing harvesters mainly focuses on harvesting performance, with less research on vibration characteristics. Therefore, in this paper, the vibration response of the metal plate–shell under the two connection modes of bolt connection and welding is studied, in order to optimize the design and structure of the plate–shell structure of the combine harvester and improve the overall performance. First, the welded and bolted plates are numerically modeled using Hypermesh pre-processing functions. Then, the boundary conditions are simulated by continuous variable stiffness elastic constraint experiments. Finally, the intrinsic vibration dynamic model of the four-sided simply supported plate and four-sided solidly supported plate is established using the modal superposition method. By analyzing the modal frequencies and vibration patterns, the following results are obtained. The connection method between the plate and the frame has a significant impact on the inherent vibration characteristics of the plate. The bolt connection will make the plate’s intrinsic vibration frequency higher than that of the welding method, but the effect on the plate’s intrinsic vibration pattern is more minor. At the same time, in order to verify the accuracy of the model, the actual modal vibration patterns and frequencies of the same proportion of plates in the modal test are compared with the results of modal vibration patterns and frequencies obtained by Ansys. The errors of the two dynamic model analytical methods are within 1% and 3%, respectively. This result verifies the accuracy of the dynamic model of the metal plate and shell structure under different connection methods.

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Section: Equivalent Modeling Of Plate and Shell Structuresmentioning

confidence: 99%

“…With the rapid development of modern agricultural production, the harvester, as a critical piece of agricultural machinery and equipment, plays a vital role in the grain harvesting process [1]. The combine harvester is a harvesting machine with multiple excitation sources.…”

Section: Introductionmentioning

confidence: 99%