| 基于双向流固耦合模型的大豆叶片变形响应机理 |
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| 引用本文：胡军,杨薇卉,刘昶希,石航,孙昊.基于双向流固耦合模型的大豆叶片变形响应机理.植物保护学报,2026,53(1):145-153 |
| DOI：10.13802/j.cnki.zwbhxb.2026.2026809 |
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| 中文摘要:为揭示风幕作用下始花期大豆枝叶的动态变形机理，测定大豆枝叶力学参数，构建大豆枝叶变形双向流固耦合模型并通过高速摄像试验对其进行验证；在此基础上，以气流速度、气流角度及叶片初始倾角为因素进行正交试验，建立叶片变形回归预测模型。结果显示：始花期大豆分枝的弹性模量（169.8 MPa）显著高于叶片的弹性模量（43.2 MPa），风载下分枝相对静止，叶片呈主叶脉弯曲特征；双向流固耦合模型仿真与实测最大相对误差为9.36%，表明模型有效；回归分析显示对叶尖变形量和叶面形心变形量影响的各因素显著性由大到小依次为气流速度、气流角度和初始倾角；回归模型拟合良好，其对叶尖变形量与叶面形心变形量的预测值与仿真值吻合度较高，平均绝对百分比误差分别为10.50%和9.49%。该研究为风幕式喷雾机的作业参数优化及大田作物高效施药提供了重要理论支撑。 |
| 中文关键词:始花期 大豆 风幕式喷雾机 叶片变形 双向流固耦合模型 计算流体力学 |
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| Numerical simulation of soybean leaf deformation based on bidirectional fluid structure coupling model |
| Author Name | Affiliation | E-mail | | Hu Jun | College of Engineering, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, China
Key Laboratory of Soybean Mechanized Production, Ministry of Agriculture and Rural Affairs, Daqing 163319, Heilongjiang Province, China | gcxykj@126.com | | Yang Weihui | College of Engineering, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, China | | | Liu Changxi | College of Engineering, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, China
Key Laboratory of Soybean Mechanized Production, Ministry of Agriculture and Rural Affairs, Daqing 163319, Heilongjiang Province, China | | | Shi Hang | College of Engineering, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, China | | | Sun Hao | College of Engineering, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, China | |
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| Abstract:To reveal the dynamic deformation mechanism of soybean branches and leaves under the influence of an air curtain, this study determined the mechanical parameters of soybean tissues and established a bidirectional fluid-structure interaction (FSI) model. The model was validated using highspeed photography experiments. Subsequently, orthogonal experiments were conducted, considering airflow velocity, airflow angle, and initial leaf inclination as key factors, to establish a regression prediction model for leaf deformation. The results indicate that the elastic modulus of soybean branches (169.8 MPa) is significantly higher than that of the leaves (43.2 MPa) during the initial flowering stage. Under wind loading, the branches remained relatively stationary while the leaves exhibited characteristic bending along the primary veins. The maximum relative error between the bidirectional FSI simulation and experimental measurements was 9.36%, confirming the model’s validity. Regression analysis demonstrated that the factors influencing leaf tip and leaf centroid displacement, in descending order of significance, are airflow velocity, airflow angle, and initial inclination. The regression models exhibited a high degree of fit, with mean absolute percentage errors of 10.50% for leaf tip displacement and 9.49% for leaf centroid displacement when predicted values were compared with simulated data. This research lays a critical theoretical basis for optimizing the operating parameters of air-curtain sprayers and enhancing the pesticide application efficiency for field crops. |
| keywords:initial flowering stage soybean air-assisted boom sprayer leaf deformation bidirectional fluid-structure interaction model computational fluid dynamics |
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