IDEAS home Printed from https://ideas.repec.org/a/gam/jagris/v15y2025i3p327-d1582177.html
   My bibliography  Save this article

Establishment of Whole-Rice-Plant Model and Calibration of Characteristic Parameters Based on Segmented Hollow Stalks

Author

Listed:
  • Ranbing Yang

    (College of Mechanical and Electrical Engineering, Hainan University, Haikou 570228, China
    Key Laboratory of Tropical Intelligent Agricultural Equipment, Ministry of Agriculture and Rural Affairs, Haikou 570228, China)

  • Peiyu Wang

    (College of Mechanical and Electrical Engineering, Hainan University, Haikou 570228, China
    Key Laboratory of Tropical Intelligent Agricultural Equipment, Ministry of Agriculture and Rural Affairs, Haikou 570228, China)

  • Yiren Qing

    (College of Mechanical and Electrical Engineering, Hainan University, Haikou 570228, China
    Key Laboratory of Tropical Intelligent Agricultural Equipment, Ministry of Agriculture and Rural Affairs, Haikou 570228, China)

  • Dongquan Chen

    (Key Laboratory of Tropical Intelligent Agricultural Equipment, Ministry of Agriculture and Rural Affairs, Haikou 570228, China
    College of Information and Communication Engineering, Hainan University, Haikou 570228, China)

  • Lu Chen

    (College of Mechanical and Electrical Engineering, Hainan University, Haikou 570228, China
    Key Laboratory of Tropical Intelligent Agricultural Equipment, Ministry of Agriculture and Rural Affairs, Haikou 570228, China)

  • Wenbin Sun

    (Key Laboratory of Tropical Intelligent Agricultural Equipment, Ministry of Agriculture and Rural Affairs, Haikou 570228, China
    College of Information and Communication Engineering, Hainan University, Haikou 570228, China)

  • Kang Xu

    (Key Laboratory of Tropical Intelligent Agricultural Equipment, Ministry of Agriculture and Rural Affairs, Haikou 570228, China
    College of Information and Communication Engineering, Hainan University, Haikou 570228, China)

Abstract

To address the limitations of the current discrete element model of rice plants in terms of accurately reflecting structural differences and threshing characteristics, this study proposes a whole-rice-plant modeling method based on segmented hollow stalks and establishes a whole-rice-plant model that accurately represents the bending and threshing characteristics of the actual rice plant. Initially, based on the characteristics of the rice plant, the rice stalk was segmented into three sections of hollow stalks with distinct structures—namely, the primary stalk, the secondary stalk, and the tertiary stalk—ensuring that the model closely resembles actual rice plants. Secondly, the mechanical and contact parameters for each structure of the rice plant were measured and calibrated through mechanical and contact tests. Subsequently, utilizing the Hertz–Mindlin contact model, a multi-dimensional element particle arrangement method was employed to establish a discrete element model of the entire rice plant. The bending characteristics of the stalk and the threshing characteristics of the rice were calibrated using three-point bending tests and impact threshing tests. The results indicated calibration errors in the bending resistance force of 4.46%, 3.95%, and 2.51% for the three-section stalk model, and the calibration error for the rice model’s threshing rate was 1.86%, which can accurately simulate the bending characteristics of the stalk and the threshing characteristics of the rice plant. Finally, the contact characteristics of the model were validated through a stack angle verification test, which revealed that the relative error of the stacking angle did not exceed 7.52%, confirming the accuracy of the contact characteristics of the rice plant model. The findings of this study provide foundational models and a theoretical basis for the simulation of and analytical applications related to rice threshing and cleaning.

Suggested Citation

  • Ranbing Yang & Peiyu Wang & Yiren Qing & Dongquan Chen & Lu Chen & Wenbin Sun & Kang Xu, 2025. "Establishment of Whole-Rice-Plant Model and Calibration of Characteristic Parameters Based on Segmented Hollow Stalks," Agriculture, MDPI, vol. 15(3), pages 1-36, February.
    • Handle: RePEc:gam:jagris:v:15:y:2025:i:3:p:327-:d:1582177
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2077-0472/15/3/327/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2077-0472/15/3/327/
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jagris:v:15:y:2025:i:3:p:327-:d:1582177. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.