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学者姓名：赵永胜
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Abstract ：
As a weak link, the joint surface of machine tools directly affects the stiffness and machining accuracy of the entire machine tool. However, obtaining the distribution of contact stress is a key problem that urgently needs to be solved in exploring the mechanical properties of joint surface connections. In this paper, a tangential contact stress ultrasonic testing method based on the equivalent medium theory is proposed, providing data support for accurately characterizing the contact state of the joint surface. A virtual material model of rough contact interface based on fractal theory is established to explore the coupling relationship between the propagation speed of ultrasonic critical refracted longitudinal waves, the tested object's material parameters, and stress. Moreover, the expression of the equivalent material parameters of the ultrasonic critical refracted longitudinal wave propagation layer with stress variation is derived. An ultrasonic acoustic time difference model considering changes in contact surface material parameters is constructed based on the principle of acoustic elasticity of ultrasound. Furthermore, a critical refractive detection model for longitudinal wave's tangential contact stress is established based on equivalent medium theory. Experimental specimens and stress detection plans are designed, and the tangential contact stress of the specimens is measured based on the division of surface grids. The equivalent stress value of each node is calculated based on the von Mises stress by measuring the stress in the X/Y direction. In addition, a shear stress distribution cloud map of the contact surface is drawn. Finally, the accuracy of the detection results is confirmed by combining theory, simulation, and experimental methods. The proposed tangential contact stress detection method based on critical refractive longitudinal waves is significant for lowstress assemblies.
Keyword ：
Contact characteristics Contact characteristics Critical refracted longitudinal waves Critical refracted longitudinal waves Contact stress Contact stress Ultrasonic testing Ultrasonic testing
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| GB/T 7714 | Niu, Nana , Zhao, Yongsheng , Liu, Zhifeng et al. Research on ultrasonic testing method for tangential contact stress based on equivalent medium theory [J]. | ULTRASONICS SONOCHEMISTRY , 2025 , 112 . |
| MLA | Niu, Nana et al. "Research on ultrasonic testing method for tangential contact stress based on equivalent medium theory" . | ULTRASONICS SONOCHEMISTRY 112 (2025) . |
| APA | Niu, Nana , Zhao, Yongsheng , Liu, Zhifeng , Li, Ying , Liu, Lele . Research on ultrasonic testing method for tangential contact stress based on equivalent medium theory . | ULTRASONICS SONOCHEMISTRY , 2025 , 112 . |
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Abstract ：
The size and distribution of the contact stress at the assembly interface will directly affect the connection performance of the mechanical joint. However, the rough assembly interface presents strong dielectric discontinuity and material nonlinearity, which become the bottleneck restricting the development of contact stress detection. How to obtain contact stress by nondestructive testing means has become an urgent problem to be solved. In this paper, a multi-layer interface contact stress detection method based on contact acoustic resistance model is proposed to solve the difficult problem of rough interface contact stress detection. Firstly, based on the formation mechanism of contact acoustic resistance of rough assembly interface, the equivalent contact acoustic resistance expression of contact layer is derived. Secondly, the contact mechanism of rough assembly interface is clarified, and the mapping relationship model between contact acoustic resistance and contact stress is constructed. On this basis, according to the transmission law of ultrasonic wave at different interfaces of multilayer acoustic impedance, the expression of acoustic transmission coefficient at the interface of variable acoustic impedance is obtained. A contact stress detection method based on contact stress-contact acoustic resistance coefficient and acoustic transmission coefficient is proposed. The correctness of the theoretical model is verified by the tensile testing machine, and the maximum error is 15.52 %. This method will provide powerful data support for the evaluation of assembly interface connection state.
Keyword ：
Contact stress Contact stress Contact acoustic resistance Contact acoustic resistance Ultrasonic detection Ultrasonic detection Assembly interface Assembly interface
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| GB/T 7714 | Nana, Niu , Yongsheng, Zhao , Zhifeng, Liu et al. Contact stress ultrasonic detection method based on contact acoustic resistance model [J]. | TRIBOLOGY INTERNATIONAL , 2024 , 199 . |
| MLA | Nana, Niu et al. "Contact stress ultrasonic detection method based on contact acoustic resistance model" . | TRIBOLOGY INTERNATIONAL 199 (2024) . |
| APA | Nana, Niu , Yongsheng, Zhao , Zhifeng, Liu , Ying, Li , Lele, Liu . Contact stress ultrasonic detection method based on contact acoustic resistance model . | TRIBOLOGY INTERNATIONAL , 2024 , 199 . |
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Abstract ：
The performance-degradation pattern of the planetary roller screw mechanism (PRSM) is difficult to predict and evaluate due to a variety of factors. Load-carrying capacity, transmission accuracy, and efficiency are the main indicators for evaluating the performance of the PRSM. In this paper, a testing device for the comprehensive performance of the PRSM is designed by taking into account the coupling relationships among temperature rise, vibration, speed, and load. First, the functional design and error calibration of the testing device were conducted. Secondly, the PRSM designed in the supported project was taken as the research object to conduct degradation tests on its load-bearing capacity and transmission accuracy and analyze the changes in transmission efficiency. Third, the thread profile and wear condition were scanned and inspected using a universal tool microscope and an optical microscope. Finally, based on the monitoring module of the testing device, the vibration status during the PRSM testing process was collected in real time, laying a foundation for the subsequent assessment of the changes in the performance state of the PRSM. The test results reveal the law of performance degradation of the PRSM under the coupled effects of temperature, vibration, speed, and load.
Keyword ：
performance degradation performance degradation efficiency efficiency planetary roller screw mechanism planetary roller screw mechanism carrying capacity carrying capacity transmission accuracy transmission accuracy condition monitoring condition monitoring
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| GB/T 7714 | Chen, Kui , Zhao, Yongsheng , Zheng, Jigui et al. Performance-Degradation Analysis of the Planetary Roller Screw Mechanism under Multi-Factor Coupling Effects [J]. | SENSORS , 2024 , 24 (14) . |
| MLA | Chen, Kui et al. "Performance-Degradation Analysis of the Planetary Roller Screw Mechanism under Multi-Factor Coupling Effects" . | SENSORS 24 . 14 (2024) . |
| APA | Chen, Kui , Zhao, Yongsheng , Zheng, Jigui , Shi, Wei , Zhang, Zhaojing . Performance-Degradation Analysis of the Planetary Roller Screw Mechanism under Multi-Factor Coupling Effects . | SENSORS , 2024 , 24 (14) . |
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Abstract ：
Time-varying loads, manufacturing errors, and assembly errors are the main factors leading to the performance degradation of the planetary roller screw mechanism. This paper proposes a comprehensive analysis method for the performance degradation of the planetary roller screw mechanism caused by time-varying loads and manufacturing and assembly errors. Firstly, a simulation analysis model of the planetary roller screw mechanism was established and its effectiveness was verified. A quantitative analysis was conducted on the influence of manufacturing and assembly errors on the load distribution, revealing the load-bearing mechanism under the influence of errors. Secondly, loading experiments were conducted on the planetary roller screw mechanism, and the degradation of its load-bearing performance was divided into the normal degradation stage, the accelerated degradation stage, and the failure stage. The experimental results prove that the initial transmission accuracy has a significant impact on the degradation of the load-bearing performance, determining the occurrence of the node where the accelerated degradation stage appears in the load-bearing performance. Thirdly, the wear status of the threads and gears was examined, and the results showed that material peeling was the main factor causing the degradation of load-bearing performance.
Keyword ：
load distribution load distribution Planetary roller screw mechanism Planetary roller screw mechanism performance degradation performance degradation assembly errors assembly errors Manufacturing errors Manufacturing errors
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| GB/T 7714 | Chen, Kui , Zhao, Yongsheng , Zheng, Jigui et al. A comprehensive analysis method of the performance degradation of planetary roller screws under the time-varying load and errors [J]. | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE , 2024 , 238 (21) : 10373-10390 . |
| MLA | Chen, Kui et al. "A comprehensive analysis method of the performance degradation of planetary roller screws under the time-varying load and errors" . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE 238 . 21 (2024) : 10373-10390 . |
| APA | Chen, Kui , Zhao, Yongsheng , Zheng, Jigui , Wang, Jianhui , Dou, Yongqiang . A comprehensive analysis method of the performance degradation of planetary roller screws under the time-varying load and errors . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE , 2024 , 238 (21) , 10373-10390 . |
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Abstract ：
The bolted joint is widely used in heavy-duty CNC machine tools, which has huge influence on working precision and overall stiffness of CNC machine. The process parameters of group bolt assembly directly affect the stiffness of the connected parts. The dynamic model of bolted joints is established based on the fractal theory, and the overall stiffness of joint surface is calculated. In order to improve the total stiffness of bolted assembly, an improved particle swarm optimization algorithm with combination of time-varying weights and contraction factor is proposed. The input parameters are preloading of bolts, fractal dimension, roughness, and object thickness. The main goal is to maximize the global rigidity. The optimization results show that improved algorithm has better convergence, faster calculation speed, preferable results, and higher optimization performance than standard particle swarm optimization algorithm. Moreover, the global rigidity optimization is achieved.
Keyword ：
fractal theory fractal theory bolt connection bolt connection particle swarm optimization algorithm particle swarm optimization algorithm bolted joint bolted joint
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| GB/T 7714 | Chen, Kui , Yang, Cheng , Zhao, Yongsheng et al. Optimization of Square-shaped Bolted Joints Based on Improved Particle Swarm Optimization Algorithm [J]. | EKSPLOATACJA I NIEZAWODNOSC-MAINTENANCE AND RELIABILITY , 2023 , 25 (3) . |
| MLA | Chen, Kui et al. "Optimization of Square-shaped Bolted Joints Based on Improved Particle Swarm Optimization Algorithm" . | EKSPLOATACJA I NIEZAWODNOSC-MAINTENANCE AND RELIABILITY 25 . 3 (2023) . |
| APA | Chen, Kui , Yang, Cheng , Zhao, Yongsheng , Niu, Peng , Niu, NaNa , Wu, Hongchao . Optimization of Square-shaped Bolted Joints Based on Improved Particle Swarm Optimization Algorithm . | EKSPLOATACJA I NIEZAWODNOSC-MAINTENANCE AND RELIABILITY , 2023 , 25 (3) . |
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Abstract ：
针对传统对接方法在缺少现场实测数据支持下的被动调整问题，提出基于数字孪生的机身对接精度优化控制方法.基于数字孪生虚实结合技术，研究机身对接工艺优化反馈控制技术. 搭建融合冗余控制算法和工艺优化策略的数字孪生系统，明确了基于现场实测数据的测量-优化-反馈精度优化流程. 基于有限状态机理论，精准重建数字孪生模型，实现对接过程的监控和精度预测，根据同轴度评价指标完成工艺参数二次设计，将优化后的工艺参数重新下发至物理现场、控制现场进行对接. 对接位姿偏差对比结果表明：对接精度优化控制方法将机身筒段位置偏差降低了60.03%，姿态偏差降低了53.94%.
Keyword ：
模型重构 模型重构 优化控制 优化控制 数字孪生 数字孪生 机身对接 机身对接 参数优化 参数优化
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| GB/T 7714 | 赵永胜 , 赵志勇 , 李迎 et al. 基于数字孪生的机身对接精度优化控制方法 [J]. | 浙江大学学报(工学版) , 2023 , 57 (5) : 883-891 . |
| MLA | 赵永胜 et al. "基于数字孪生的机身对接精度优化控制方法" . | 浙江大学学报(工学版) 57 . 5 (2023) : 883-891 . |
| APA | 赵永胜 , 赵志勇 , 李迎 , 张涛 . 基于数字孪生的机身对接精度优化控制方法 . | 浙江大学学报(工学版) , 2023 , 57 (5) , 883-891 . |
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Abstract ：
This study describes an intelligent method for modeling and optimization of piezoelectric ejection system design for additive manufacturing. It is a combination of neural network (NN) techniques and finite element simulation (FES) that allows designing each parameter of a piezoelectric ejection system faster and more reliably than conventional methods. Using experimental and literature data, a FE model of the droplet ejection process was developed and validated to predict two indexes of droplet ejection behavior (DEB): jetting velocity and droplet diameter. Two artificial neural network (ANN) models based on feed-forward back propagation were developed and optimized by genetic algorithm (GA). A database was established by FE calculations, and the models were trained to establish the relationship between the piezoelectric ejection system design input parameters and each DEB indicator. The results show that both NN models can independently predict the droplet jetting velocity and droplet diameter values from the training and testing data with high accuracy to determine the optimal piezoelectric ejection system design. Finally, the accuracy of the prediction results of the FES and ANN-GA models was verified experimentally. It was found that the errors between the predicted and experimental results were 4.48% and 3.18% for the jetting velocity and droplet diameter, respectively, verifying that the optimization method is reliable and robust for piezoelectric ejection system design optimization.
Keyword ：
piezoelectric ejection system design piezoelectric ejection system design FE simulation FE simulation additive manufacturing additive manufacturing droplet ejection behavior droplet ejection behavior neural networks neural networks
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| GB/T 7714 | Li, Xin , Zhao, Yongsheng . Intelligent Optimization Method of Piezoelectric Ejection System Design Based on Finite Element Simulation and Neural Network [J]. | 3D PRINTING AND ADDITIVE MANUFACTURING , 2023 . |
| MLA | Li, Xin et al. "Intelligent Optimization Method of Piezoelectric Ejection System Design Based on Finite Element Simulation and Neural Network" . | 3D PRINTING AND ADDITIVE MANUFACTURING (2023) . |
| APA | Li, Xin , Zhao, Yongsheng . Intelligent Optimization Method of Piezoelectric Ejection System Design Based on Finite Element Simulation and Neural Network . | 3D PRINTING AND ADDITIVE MANUFACTURING , 2023 . |
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Abstract ：
本发明公开了一种基于表面主应变测量内六角螺栓预紧力的试验系统与方法，测试系统由预埋应变片内六角螺栓、缩比试验件、三轴应变花、动态应变仪和上位机组成，三轴应变花对称粘贴在距离内六角螺栓轴线nd位置，测试方法包括：S1、应用动态应变仪和上位机采集螺栓预紧力与测点三个方向的应变；S2、基于测点三向应变数据计算测点主应变ε1和ε2；S3、获取测点主应力σ1和σ2，设计四个测点主应力标准差的阈值；S4、建立表征内六角螺栓预紧力与测点平均应力关系的数据驱动模型。本发明属于数控机床高性能装配技术领域，能够准确测量不同材料和尺寸的内六角螺栓连接结构预紧力，解决了内六角螺栓预紧力在线无损测量方法缺失问题。
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| GB/T 7714 | 李迎 , 李赫 , 刘志峰 et al. 一种基于表面主应变测量内六角螺栓预紧力的试验系统与方法 : CN202310703260.4[P]. | 2023-06-14 . |
| MLA | 李迎 et al. "一种基于表面主应变测量内六角螺栓预紧力的试验系统与方法" : CN202310703260.4. | 2023-06-14 . |
| APA | 李迎 , 李赫 , 刘志峰 , 赵永胜 , 王子龙 , 陈继民 . 一种基于表面主应变测量内六角螺栓预紧力的试验系统与方法 : CN202310703260.4. | 2023-06-14 . |
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本发明公开了一种内反馈式静压转台扇形单油垫实验装置，包括静压支撑系统，静压支撑系统由供油系统供油。静压支撑系统的上油垫、下油垫通过螺栓固定在支撑导轨上，支撑导轨设于U形支撑板内，上油垫、下油垫分别正对U形支撑板的上下内壁，U形支撑板与上油垫之间，U形支撑板与下油垫之间分别形成油膜厚度；内反馈的油路通过内孔隐藏在支撑导轨内部；支撑导轨由支撑杆支撑连接，U形支撑板的外部设有磁性水平尺；U形支撑板的底部设有压力传感器；压力传感器的底部设有竖向安装丝杠，由丝杠调节U形支撑板的高度；三个手轮与丝杠相连，通过转动手轮来调节丝杠高度；本发明可以检测单油垫的承载性能，不需要搭建整个静压转台，降低了成本。
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| GB/T 7714 | 赵永胜 , 罗嘉庆 , 杨聪彬 et al. 一种内反馈式静压转台扇形单油垫实验装置 : CN202310230975.2[P]. | 2023-03-12 . |
| MLA | 赵永胜 et al. "一种内反馈式静压转台扇形单油垫实验装置" : CN202310230975.2. | 2023-03-12 . |
| APA | 赵永胜 , 罗嘉庆 , 杨聪彬 , 李迎 , 刘志峰 . 一种内反馈式静压转台扇形单油垫实验装置 : CN202310230975.2. | 2023-03-12 . |
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Abstract ：
本发明公开了一种面向数字孪生修型系统的多级反馈优化方法，一方面，提供一种基于多线程‑定时器的直接反馈方法，对实际修型过程进行实时监控，当监控到设备状态或修型工件出现问题时及时反馈至智能决策模块重新进行修型路径规划与工艺参数智能决策；另一方面，提供一种基于修型结果产生的偏差值的间接反馈方法，在修型完成后，通过实际数模与理论数模对比输出修型质量评估报告，若出现当前修型质量与预期质量不符时，通过数据增强的方式再次训练智能决策模块或质量评估模型的算法网络模型，调整修型工艺参数。本发明将修型过程数据与修型质量信息合理高效的反馈至数字孪生修型系统，提高工件修型质量。
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| GB/T 7714 | 赵永胜 , 马锡盟 , 陈建洲 et al. 一种面向数字孪生修型系统的多级反馈优化方法 : CN202310743952.1[P]. | 2023-06-24 . |
| MLA | 赵永胜 et al. "一种面向数字孪生修型系统的多级反馈优化方法" : CN202310743952.1. | 2023-06-24 . |
| APA | 赵永胜 , 马锡盟 , 陈建洲 , 付康 , 马旭辉 . 一种面向数字孪生修型系统的多级反馈优化方法 : CN202310743952.1. | 2023-06-24 . |
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