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学者姓名：贾超
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Abstract ：
In view of the problems of the complex design, difficult machining, and high manufacturing cost of a traditional nutation reducer, this paper intends to design a nutation reducer and study its meshing performance. First, the meshing pair is designed by the method of internal and external cutting of the shaper cutter, and the method of face gear tooth surface modification is proposed. Second, based on tooth contact analysis (TCA) and loaded tooth contact analysis (LTCA), the contact performance of the meshing pair is studied. Then, the nutation reducer is improved by using the pair instead of the internal bevel gear pair. Finally, examples are presented to test the feasibility of the improved design. The results show that the improved nutation reducer maintains the advantages of a large transmission ratio and high bearing capacity of the traditional nutation reducer and can make use of the advantages of face gears to further improve its transmission performance. This study can lay a foundation for the further application and popularization of nutation reducers.
Keyword ：
face gear face gear meshing performance analysis meshing performance analysis nutation drive nutation drive reducer design reducer design tooth modification tooth modification
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| GB/T 7714 | Chen, Haoyu , Li, Qinghai , Jia, Chao . Research on the Design and Meshing Performance Analysis of Face Gear Face Gear Meshing Nutation Reducers [J]. | MATHEMATICS , 2025 , 13 (3) . |
| MLA | Chen, Haoyu 等. "Research on the Design and Meshing Performance Analysis of Face Gear Face Gear Meshing Nutation Reducers" . | MATHEMATICS 13 . 3 (2025) . |
| APA | Chen, Haoyu , Li, Qinghai , Jia, Chao . Research on the Design and Meshing Performance Analysis of Face Gear Face Gear Meshing Nutation Reducers . | MATHEMATICS , 2025 , 13 (3) . |
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A study on the dynamic characteristics of non-orthogonal helical face gears with higher-order tooth surface modification is presented in this article. The method of designing the non-orthogonal helical face gears with higher-order tooth surface modification is described. First, MATLAB programming that can be used for the parameterized 3D mesh calculations of non-orthogonal helical face gears with higher-order tooth surface modification are completed. Second, the calculated grid nodes from the MATLAB programming are imported into ABAQUS to generate a three-dimensional mode. The meshing stiffness of the gear pair is then estimated using finite element analysis. Ultimately, a dynamic model of a non-orthogonal helical face gear pair involving second-order and higher-order tooth surface modifications is established. One example is presented to study the dynamic characteristics of non-orthogonal helical face gear pairs with second-order and higher-order tooth surface modifications. The results show that the dynamic response from the second-order tooth surface modification has a higher peak-to-peak amplitude than that of the higher-order modification.
Keyword ：
dynamic characteristics dynamic characteristics higher-order transmission error higher-order transmission error non-orthogonal helical face gears non-orthogonal helical face gears tooth surface modification tooth surface modification
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| GB/T 7714 | Jia, Chao , Zhang, Ge . Investigation on the Dynamic Characteristics of Non-Orthogonal Helical Face Gears with Higher-Order Tooth Surface Modification [J]. | MATHEMATICS , 2024 , 12 (3) . |
| MLA | Jia, Chao 等. "Investigation on the Dynamic Characteristics of Non-Orthogonal Helical Face Gears with Higher-Order Tooth Surface Modification" . | MATHEMATICS 12 . 3 (2024) . |
| APA | Jia, Chao , Zhang, Ge . Investigation on the Dynamic Characteristics of Non-Orthogonal Helical Face Gears with Higher-Order Tooth Surface Modification . | MATHEMATICS , 2024 , 12 (3) . |
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Abstract ：
基于曲线型啮合线设计了一种高承载能力低滑动率新型齿轮，借助微分几何和空间啮合理论，通过预设抛物线啮合线推导新型齿轮齿廓方程，计算新型齿轮重合度和齿面滑动率．利用Matlab编程仿真齿轮加工过程，实现新型齿轮参数化高精度三维有限元网格建模．在此基础上，通过轮齿承载接触分析，深入分析安装误差、齿面修形等对新型齿轮齿面接触应力和齿根弯曲应力的影响．结果表明：与渐开线齿轮相比，设计的新型齿轮重合度明显提高，传动更加平稳；齿面相对滑动率降低22.9%，啮合效率提高，有效寿命延长；相同载荷下，无误差无修形工况和有误差有修形工况的新型齿轮承载能力都明显优于渐开线齿轮，特别是齿面接触应力减小高达17.0%以上．
Keyword ：
低滑动率 低滑动率 新型齿轮 新型齿轮 轮齿承载接触分析 轮齿承载接触分析 高承载 高承载 齿廓设计 齿廓设计
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| GB/T 7714 | 贾超 , 贺庆拓 , 方宗德 . 新型高承载能力低滑动率齿轮设计与分析 [J]. | 华中科技大学学报(自然科学版) , 2024 , 52 (06) : 87-93 . |
| MLA | 贾超 等. "新型高承载能力低滑动率齿轮设计与分析" . | 华中科技大学学报(自然科学版) 52 . 06 (2024) : 87-93 . |
| APA | 贾超 , 贺庆拓 , 方宗德 . 新型高承载能力低滑动率齿轮设计与分析 . | 华中科技大学学报(自然科学版) , 2024 , 52 (06) , 87-93 . |
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Abstract ：
为了准确计算新型内啮合S型齿轮的啮合效率，引入了考虑轮齿表面滑差、润滑油状况及时变载荷等因素的弹流润滑时变摩擦模型；分析啮合齿面润滑机制，通过轮齿接触分析（Tooth Contact Analysis,TCA）及轮齿承载接触分析，计算了啮合齿面滑动摩擦因数及摩擦损失功率；在此基础上，获得内啮合S型齿轮啮合周期内的瞬时啮合效率和平均啮合效率，并给出了计算实例。研究结果表明，在相同设计参数下，新型内啮合S型齿轮较渐开线齿轮有更高的啮合效率；经螺旋线修形后，新型内啮合S型齿轮的啮合效率有所提高且随修形量的增大而增大。
Keyword ：
啮合效率 啮合效率 新型内啮合S型齿轮 新型内啮合S型齿轮 轮齿承载接触分析 轮齿承载接触分析 轮齿接触分析 轮齿接触分析
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| GB/T 7714 | 程洪业 , 贾超 , 方宗德 . 新型内啮合S型齿轮啮合效率计算与分析 [J]. | 机械传动 , 2024 , 48 (03) : 59-66 . |
| MLA | 程洪业 等. "新型内啮合S型齿轮啮合效率计算与分析" . | 机械传动 48 . 03 (2024) : 59-66 . |
| APA | 程洪业 , 贾超 , 方宗德 . 新型内啮合S型齿轮啮合效率计算与分析 . | 机械传动 , 2024 , 48 (03) , 59-66 . |
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Abstract ：
In order to improve the contact strength and reduce the sliding friction of the gear pair, an internal cylindrical gear pair with a curved meshing line is studied in this paper. Firstly, a curved meshing line is designed. The tooth profiles of the internal gear pair with the designed meshing line are calculated by using differential geometry and the gear meshing principle. Secondly, a wear model is established by combining the finite element method and the Archard wear formula. Then, a numerical simulation is conducted; the relative curvature, sliding coefficient, sliding distance, maximum contact pressure, transmission error, and wear depth are calculated. Ultimately, the variation law of tooth surface wear of new gear with and without installation errors is observed under different stress cycles. On this basis, the influence of tooth modification on tooth surface wear is further researched. Through the results, the advantages of the introduced novel internal cylindrical gears in wear resistance are further demonstrated. The study in this paper provides new research ideas and methods for gear wear research and gear design. © 2024 by the authors.
Keyword ：
curved meshing line curved meshing line internal cylindrical gears internal cylindrical gears numerical analysis numerical analysis tooth contact tooth contact wear characteristics wear characteristics
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| GB/T 7714 | Jia, C. , Zhang, G. , Li, G. . Numerical Analysis of Tooth Contact and Wear Characteristics of Internal Cylindrical Gears with Curved Meshing Line [J]. | Applied Sciences (Switzerland) , 2024 , 14 (13) . |
| MLA | Jia, C. 等. "Numerical Analysis of Tooth Contact and Wear Characteristics of Internal Cylindrical Gears with Curved Meshing Line" . | Applied Sciences (Switzerland) 14 . 13 (2024) . |
| APA | Jia, C. , Zhang, G. , Li, G. . Numerical Analysis of Tooth Contact and Wear Characteristics of Internal Cylindrical Gears with Curved Meshing Line . | Applied Sciences (Switzerland) , 2024 , 14 (13) . |
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Abstract ：
基于弧齿锥齿轮的复杂齿面设计和实际啮合情况,提出一种利用齿廓成型刀具的齿廓建模方法,能有效实现弧齿锥齿轮齿廓的精确建模.以弧齿锥齿轮为主要建模对象,提出自动化建模及装配方法,开发一种参数化设计系统软件.该软件能够实现弧齿锥齿轮的自动化快速建模和装配,缩短建模时间,提高设计质量与效率,有助于推动产业数字化转型,发展高端装备制造业.
Keyword ：
参数化设计 参数化设计 工业软件 工业软件 弧齿锥齿轮 弧齿锥齿轮 自动化建模及装配 自动化建模及装配
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| GB/T 7714 | 姚立纲 , 黄思捷 , 贾超 et al. 弧齿锥齿轮齿面建模和参数化设计系统软件开发 [J]. | 福州大学学报（自然科学版） , 2024 , 52 (5) : 560-568 . |
| MLA | 姚立纲 et al. "弧齿锥齿轮齿面建模和参数化设计系统软件开发" . | 福州大学学报（自然科学版） 52 . 5 (2024) : 560-568 . |
| APA | 姚立纲 , 黄思捷 , 贾超 , 丁嘉鑫 , 蔡英杰 . 弧齿锥齿轮齿面建模和参数化设计系统软件开发 . | 福州大学学报（自然科学版） , 2024 , 52 (5) , 560-568 . |
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Abstract ：
为了探究新型曲线型啮合线齿轮接触特性与磨损特征规律,构建了新型齿轮的有限元三维模型,利用ABAQUS对其进行承载接触分析,在此基础上,基于Hertz接触理论和Archard磨损公式,建立了新型曲线型啮合线齿轮磨损模型,并对新型齿轮齿面磨损特性进行了数值仿真,计算齿面相对滑动距离,求出在准静态载荷下齿面磨损量及磨损曲线.最终将新型齿轮与渐开线齿轮的承载接触特性和磨损规律做了对比研究,研究结果表明:与渐开线齿轮相比,新型曲线型啮合线齿轮在承载能力和传动平稳性方面都更优,尤其是齿面接触应力可减小高达17.0%以上.曲线啮合线齿轮齿面磨损深度沿齿廓方向分布不均匀,曲线啮合线齿轮齿面磨损深度从齿根到节点位置逐渐减小,而后从节点到齿顶位置又逐渐增大,且齿根位置的齿面磨损深度大于齿顶位置的齿面磨损深度.新型齿轮副的最大磨损深度降低了28.44%,可以有效改善渐开线齿轮副存在的非均匀磨损现象,从而延长齿轮传动装置的使用寿命,该研究成果为降低齿轮磨损研究和新型齿轮齿廓设计提供了思路和方法.
Keyword ：
接触特性 接触特性 曲线型啮合线 曲线型啮合线 磨损计算 磨损计算 齿形设计 齿形设计 齿面滑动率 齿面滑动率
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| GB/T 7714 | 贾超 , 吕云涛 , 贺庆拓 . 新型曲线型啮合线齿轮齿面接触与磨损分析 [J]. | 摩擦学学报（中英文） , 2024 , 44 (10) : 1345-1354 . |
| MLA | 贾超 et al. "新型曲线型啮合线齿轮齿面接触与磨损分析" . | 摩擦学学报（中英文） 44 . 10 (2024) : 1345-1354 . |
| APA | 贾超 , 吕云涛 , 贺庆拓 . 新型曲线型啮合线齿轮齿面接触与磨损分析 . | 摩擦学学报（中英文） , 2024 , 44 (10) , 1345-1354 . |
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Introduction: Regular and rapid large-scale screening for pathogens is crucial for controlling pandemics like Coronavirus Disease 2019 (COVID-19). In this study, we present the development of a digital point-of-care testing (POCT) system utilizing microfluidic paper-based analytical devices (mu PADs) for the detection of SARS-CoV-2 gene fragments. The system incorporates temperature tuning and fluorescent detection components, along with intelligent and autonomous image acquisition and self-recognition programs. Methods: The developed POCT system is based on the nucleic acid amplification test (NAAT), a well-established molecular biology technique for detecting and amplifying nucleic acids. We successfully detected artificially synthesized SARS-CoV-2 gene fragments, namely ORF1ab gene, N gene, and E gene, with minimal reagent consumption of only 2.2 mu L per readout, representing a mere 11% of the requirements of conventional in-tube methods. The power dissipation of the system was low, at 6.4 W. Results: Our testing results demonstrated that the proposed approach achieved a limit of detection of 1000 copies/mL, which is equivalent to detecting 1 copy or a single RNA template per reaction. By employing standard curve analysis, the quantity of the target templates can be accurately determined. Conclusion: The developed digital POCT system shows great promise for rapid and reliable detection of SARS-CoV-2 gene fragments, offering a cost-effective and efficient solution for controlling pandemics. Its compatibility with other diagnostic techniques and low reagent consumption make it a viable option to enhance healthcare in resource-limited areas.
Keyword ：
automatic image processing automatic image processing NAAT NAAT paper microfluidics paper microfluidics POCT POCT SARS-CoV-2 template detection SARS-CoV-2 template detection
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| GB/T 7714 | Dong, Hui , Mo, Jin , Yu, Yongjian et al. A portable system for economical nucleic acid amplification testing [J]. | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2023 , 11 . |
| MLA | Dong, Hui et al. "A portable system for economical nucleic acid amplification testing" . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY 11 (2023) . |
| APA | Dong, Hui , Mo, Jin , Yu, Yongjian , Xie, Wantao , Zheng, Jianping , Jia, Chao . A portable system for economical nucleic acid amplification testing . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2023 , 11 . |
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In order to improve the meshing performance of non-orthogonal helical face-gears, a designation of double-crowned tooth modification with high-order transmission error (HTE) is constructed in this paper. First, the double-crowned tooth modification is designed based on the tooth profile modification of the rack-cutter and the motion relationship between the rack-cutter and the processed pinion, and then, the designation of high-order tooth modification is verified by using tooth contact analysis (TCA). Second, a parameterized 3D grid of modified gears is generated based on MATLAB programming, and a simulation of loaded tooth contact analysis for modified non-orthogonal helical face-gears is carried out by using ABAQUS software. Third, the calculation results of the standard tooth, second-order parabolic modified tooth and high-order parabolic modified tooth are compared with and without the assembly errors. Ultimately, an example is presented and the results show that the geometric transmission error of the newly designed high-order modified non-orthogonal helical face-gears conforms to the expected design. Compared with the second-order parabolic tooth modification, the newly designed high-order tooth modification pair shows a better meshing performance with and without assembly errors. The research of this paper can provide ideas and methods for the tooth modification design of non-orthogonal helical face-gear. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Keyword ：
High-order transmission error High-order transmission error Loaded tooth contact analysis Loaded tooth contact analysis Non-orthogonal helical face-gear Non-orthogonal helical face-gear Parameterized 3D grid Parameterized 3D grid Tooth contact analysis Tooth contact analysis
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| GB/T 7714 | Xu, J. , Jia, C. . Design and Analysis of Modified Non-orthogonal Helical Face-Gears with a High-Order Transmission Error [未知]. |
| MLA | Xu, J. et al. "Design and Analysis of Modified Non-orthogonal Helical Face-Gears with a High-Order Transmission Error" [未知]. |
| APA | Xu, J. , Jia, C. . Design and Analysis of Modified Non-orthogonal Helical Face-Gears with a High-Order Transmission Error [未知]. |
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Abstract ：
This study proposes a double-crown tooth surface modification technology that improves the load-carrying capacity of non-orthogonal helical tooth surface gears. The tooth modification is determined by a modified rack-cutter, and its feed motion is related to an intentionally designed transmission error. The novelty of the tooth modification design is that the transmission error can be pre-designed. First, changing the tooth profile of the tool enables preliminary modification along the tooth profile direction; second, by modifying the interaction between the tool and the machined gear, subsequent fine adjustments are made to the contact path. This two-stage tooth modification strategy not only retains the advantages of the traditional method but also significantly improves the balance of the load distribution on the tooth surface through an original contact path modification strategy. Through systematic tooth contact analysis (TCA) and loaded tooth contact analysis (LTCA), it was verified that the new method reduces contact stress and tooth root bending stress and improves the gear's resistance to misalignment errors. This research provides the basis and motivation for further exploring and improving this tooth profile modification technology to solve the challenges faced by more complex gear systems.
Keyword ：
load-bearing capacity load-bearing capacity loaded tooth contact analysis loaded tooth contact analysis non-orthogonal helical face gears non-orthogonal helical face gears novel tooth modification novel tooth modification tooth contact analysis tooth contact analysis
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| GB/T 7714 | Jia, Chao , Li, Bingquan , Xu, Junhong et al. A Novel Tooth Modification Methodology for Improving the Load-Bearing Capacity of Non-Orthogonal Helical Face Gears [J]. | MACHINES , 2023 , 11 (12) . |
| MLA | Jia, Chao et al. "A Novel Tooth Modification Methodology for Improving the Load-Bearing Capacity of Non-Orthogonal Helical Face Gears" . | MACHINES 11 . 12 (2023) . |
| APA | Jia, Chao , Li, Bingquan , Xu, Junhong , Mundo, Domenico . A Novel Tooth Modification Methodology for Improving the Load-Bearing Capacity of Non-Orthogonal Helical Face Gears . | MACHINES , 2023 , 11 (12) . |
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