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| 1 | Approximate-model Based Estimation Method for Dynamic Response of Forging Processes显示文摘Many high-quality forging productions require the large-sized hydraulic press machine(HPM) to have a desirable dynamic response. Since the forging process is complex under the low velocity, its response is difficult to estimate. And this often causes the desirable low-velocity forging condition difficult to obtain. So far little work has been found to estimate the dynamic response of the forging process under low velocity. In this paper, an approximate-model based estimation method is proposed to estimate the dynamic response of the forging process under low velocity. First, an approximate model is developed to represent the forging process of this complex HPM around the low-velocity working point. Under guaranteeing the modeling performance, the model may greatly ease the complexity of the subsequent estimation of the dynamic response because it has a good linear structure. On this basis, the dynamic response is estimated and the conditions for stability, vibration, and creep are derived according to the solution of the velocity. All these analytical results are further verified by both simulations and experiment. In the simulation verification for modeling, the original movement model and the derived approximate model always have the same dynamic responses with very small approximate error. The simulations and experiment finally demonstrate and test the effectiveness of the derived conditions for stability, vibration, and creep, and these conditions will benefit both the prediction of the dynamic response of the forging process and the design of the controller for the high-quality forging. The proposed method is an effective solution to achieve the desirable low-velocity forging condition. | LEI Jie LU Xinjiang LI Yibo HUANG Minghui ZOU Wei | 2015 | Chinese Journal of Mechanical Engineering2015，28，3： | 2 |
| 2 | 平行连杆式锻造操作机缓冲装置的结构特性分析显示文摘根据平行连杆式锻造操作机的结构特性和控制原理,分析了锻造操作机吊挂系统的工况,明确了锻造操作机的缓冲机理,建立了锻造操作机的启动和制动工况动力学模型,为优化锻造操作机的缓冲性能提供了理论支撑。结合锻造操作机的缓冲机理和工况,分析了缓冲缸和平升缸对锻造操作机缓冲性能的影响,明确了平升缸在缓冲装置中的作用。通过对缓冲缸的受力状态和平升缸驱动力矩的分析,提出了影响锻造操作机缓冲性能的结构因素,研究了钳杆平升降与缓冲缸、平升缸与前转架的位置关系对缓冲性能的影响,确定了前吊杆和缓冲缸的结构参数,明确了锻造操作机缓冲装置关键结构因素的内在关系,为锻造操作机的动力学分析和吊挂系统结构设计提供了理论依据。 | 陈缘缘 刘艳妍 张起樑 何琪功 | 2023 | 锻压技术2023，48，2： | 0 |
| 3 | Collaborative Simulation Method with Spatiotemporal Synchronization Process Control显示文摘When designing a complex mechatronics system, such as high speed trains, it is relatively difficult to effectively simulate the entire system's dynamic behaviors because it involves multi-disciplinary subsystems. Currently, a most practical approach for multi-disciplinary simulation is interface based coupling simulation method, but it faces a twofold challenge: spatial and time unsynchronizations among multi-directional coupling simulation of subsystems. A new collaborative simulation method with spatiotemporal synchronization process control is proposed for coupling simulating a given complex mechatronics system across multiple subsystems on different platforms. The method consists of 1) a coupler-based coupling mechanisms to define the interfacing and interaction mechanisms among subsystems, and 2) a simulation process control algorithm to realize the coupling simulation in a spatiotemporal synchronized manner. The test results from a case study show that the proposed method 1) can certainly be used to simulate the sub-systems interactions under different simulation conditions in an engineering system, and 2) effectively supports multi-directional coupling simulation among multi-disciplinary subsystems. This method has been successfully applied in China high speed train design and development processes, demonstrating that it can be applied in a wide range of engineering systems design and simulation with improved efficiency and effectiveness. | ZOU Yisheng DING Guofu ZHANG Weihua ZHANG Jian QIN Shengfeng TAN John Kian | 2016 | Chinese Journal of Mechanical Engineering2016，29，6： | 0 |
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