基于 RSM 和 NSGA-II 的杨树枝线性切削性能测试和参数优化

IF 2.4 2区 农林科学 Q1 FORESTRY Forests Pub Date : 2024-01-10 DOI:10.3390/f15010146
Liang Zhao, Weidong Yuan, Linyun Xu, Shouxiang Jin, Wangbin Cui, Jiangkun Xue, Hongping Zhou
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引用次数: 0

摘要

为降低杨树爬树修剪机作业过程中的切削力和切削能耗,本研究根据杨树树枝生长特性和修剪造林要求,设计了树枝直线切削试验台装置。首先对杨树枝进行了切削力学分析,探讨了影响切削力的重要参数,然后通过响应面法(RSM)对杨树枝进行了切削性能测试和参数优化。试验结果表明,切削速度、刀刃角和刀背角对杨树枝的极限剪切应力、单位面积切削功率消耗和树枝损伤率有显著影响,建立的回归方程拟合度较高。同时,建立了极限剪切应力、单位面积切削功率消耗和枝条损伤率之间的二阶回归数学模型和显著性参数。采用非支配排序遗传算法 II(NSGA-II)进行多目标优化计算,获得了切削参数的最佳组合:切削速度为 3.02 m/s,刀刃角为 15°,刀背角为 3°。在这种情况下,杨树枝的极限剪切应力、单位面积切削功率消耗和树枝损伤率都很小,分别为 346.63 kPa、9.35 mJ/mm2 和 12.36%。通过试验验证可以看出,验证试验与模型预测值的相对误差小于 7%。此外,在刀具刃角为 15°的情况下,极限剪切应力、单位面积切削功率消耗和支管损伤率分别比刀具刃角为 20°的情况下降低了 17.29%、14.98% 和 34.21%,验证了试验结果和研究方法的有效性和可靠性。本研究可为节能型杨树攀登修剪设备的研发及相关切枝性能测试提供数据支持和参考。
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Linear Cutting Performance Tests and Parameter Optimization of Poplar Branches Based on RSM and NSGA-II
To reduce the cutting force and cutting energy consumption during the operation of tree-climbing pruning machines for poplar trees, a linear cutting test bench device for branches was designed according to the growth characteristics of poplar branches and pruning forestry requirements in this study. Firstly, the cutting mechanical analysis of poplar branches was carried out to explore the significance parameters affecting the cutting force, and then the cutting performance test and parameter optimization of poplar branches was carried out through the response surface method (RSM). The test results indicated that cutting speed, tool edge angle and tool back angle had significant effects on the ultimate shear stress, cutting power consumption per unit area, and the branch damage rate of poplar branches, and the established regression equation demonstrated high goodness of fit. Meanwhile, a second-order regression mathematical model was developed between ultimate shear stress, cutting the power consumption per unit area of the cut and the branch damage rate, and the significance parameter. The non-dominated Sorting Genetic Algorithm II (NSGA-II) was used for multi-objective optimization computation to obtain the optimal combination of cutting parameters as 3.02 m/s for cutting speed, 15° for tool edge angle, and 3° for tool back angle. In this case, the ultimate shear stress, cutting power consumption per unit area, and branch damage rate of poplar branches were small, which were 346.63 kPa, 9.35 mJ/mm2, and 12.36%, respectively. Through the test verification, it can be seen that the relative error between the verification test and the predicted value of model was less than 7%. Moreover, under a cutting tool edge angle of 15°, the ultimate shear stress, cutting power consumption per unit area, and branch damage rate were, respectively, reduced by 17.29%, 14.98%, and 34.21% compared with those under a cutting tool edge angle of 20°, which verifies the validity and reliability of the test results and the research method. This study can provide data support and reference for the research and development of energy-efficient poplar tree-climbing pruning equipment and related branch-cutting performance tests.
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来源期刊
Forests
Forests FORESTRY-
CiteScore
4.40
自引率
17.20%
发文量
1823
审稿时长
19.02 days
期刊介绍: Forests (ISSN 1999-4907) is an international and cross-disciplinary scholarly journal of forestry and forest ecology. It publishes research papers, short communications and review papers. There is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental and/or methodical details must be provided for research articles.
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