共查询到19条相似文献,搜索用时 93 毫秒
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为使携行式外骨骼具有更好的减震和缓冲功能,在携行式外骨骼中增设了缓冲结构。将整个携行式外骨骼视为刚性结构与柔性结构的耦合模型,以60 kg为负重载荷,并考虑冲击系数,在ANSYS中利用刚性区域和耦合技术处理携行式外骨骼有限元模型,并进行该外骨骼结构行走姿态的受力分析和整机振动模态分析,获取外骨骼各姿态应力值和整机各阶振型、振动频率。根据分析结果得,外骨骼结构除踝关节结构需加强外,其余部件均满足静力学强度要求,模态分析结果显示该携行式外骨骼有效避免了人体运动过程中共振现象的产生。对外骨骼进行应力测试和行走测试,各测试数据表明外骨骼满足实际使用要求。 相似文献
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根据托举搬运的工况要求,设计了一种上肢外骨骼助力系统,该系统具有可穿戴、易操控、高随动及大承载等特点。根据人体上肢结构、运动的特点,采用集成化设计方法建立了上肢外骨骼助力系统的Inventor模型,设计了能托举搬运40 kg重物的上肢外骨骼助力系统,并对框架式机械臂、多级转阀式肘肩关节、转阀驱动机构进行了较为详细的分析说明。对上肢外骨骼助力系统的助力原理进行了分析,并对其创新点进行了总结归纳。为了提高上肢外骨骼助力系统的安全性,利用ANSYS Workbench软件对其关键零/部件进行强度分析,分析结果表明上肢外骨骼助力系统的关键零/部件强度符合安全要求,保证了使用的安全性,并为后期的进一步优化设计提供了设计参考。 相似文献
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为了研究人机携行外骨骼行走过程中多相交替过程下运动学参数的变化规律,基于D-H坐标系对外骨骼建立运动学模型,运用Newton-Euler递归公式计算出行走过程中的运动学表达式。为实现外骨骼与人体的携行运动,通过位移姿态传感器对人体行走过程中各关节参数进行了测量与分析。基于西南交通大学第三代人机携行外骨骼为研究对象,在Adams环境中建立虚拟样机,以人体运动参数为驱动,对外骨骼进行运动学仿真,并以双腿多相交替过程为切入点,对仿真结果进行了分析。结果可为人机携行外骨骼驱动的测控系统提供可靠依据。 相似文献
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A new approach to analyze the multi-domain acoustic system divided and enclosed by flexible structures is presented in this paper. The boundary element formulation of the Helmholtz integral equation is used for the internal fields and the finite element formulation for the structures surrounding the fields. We developed a numerical analysis program for the structural-acoustic coupling problems of the multi-domain system, in which boundary conditions such as the continuity of normal particle velocity and sound pressure in the structural interfaces between Field 1 and Field 2 are not needed. The validity of the numerical analysis program is verified by comparing the numerical results with the experimental ones. Example problems are included to investigate the characteristics of the coupled multi-domain system. 相似文献
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通过对机械结构疲劳分析的一般方法,结合目前工程技术领域广泛应用的有限元分析技术,以机车构架为载体进行结构的疲劳分析,并对设计的结构进行相应的改进,缩短了设计周期,减少了实验次数及成本,提高了设计产品的可靠性. 相似文献
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针对ANSYS有限元软件分析过程的复杂、费时等问题,需要借助参数化设计的思想来优化产品结构,缩短设计周期.对三种参数化有限元的实现方法进行了分析、比较,选定了基于APDL的参数化有限元分析方法,并用C Builder对ANSYS参数化分析过程全封装,最后用实例给出了具体的实现过程. 相似文献
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Hanmin PENG Yao HUI Qingjun DING Huafeng LI Chunsheng ZHAO 《Frontiers of Mechanical Engineering》2010,5(2):204
Recently, a type of flexible grippers with low power supply (0–5 V) has been designed and developed for grasping small but precision parts. In previous work, the authors manufactured a soft gripper whose actuating components are made of ionic polymer-metal composite (IPMC) materials; however, there is not a comprehensive model to analyze the complete mechanics for this IPMC gripper. Therefore, this paper provides a finite element method for analyzing its static mechanics characteristics in the state with maximal stress and strain (i.e., the gripper opening largest, including the IPMC deformation, stress, and strain). Further, these electromechanical coupling relationships can be simulated by using the piezoelectric analysis module based on ANSYS software. The simulation results show that the maximal tip displacement of IPMC strips can nearly reach their own free length, the maximal stress is 54 MPa in the center of copper electrodes, and the maximal strain is 0.0286 on the IPMC strip. The results provide detailed numerical solutions and appropriate finite element analysis methodologies beneficial for further research on the optimization design, forecast analysis, and control field. 相似文献
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Hanmin Peng Yao Hui Qingjun Ding Huafeng Li Chunsheng Zhao 《Frontiers of Mechanical Engineering in China》2010,5(2):204-211
Recently, a type of flexible grippers with low power supply (0–5 V) has been designed and developed for grasping small but
precision parts. In previous work, the authors manufactured a soft gripper whose actuating components are made of ionic polymer-metal
composite (IPMC) materials; however, there is not a comprehensive model to analyze the complete mechanics for this IPMC gripper.
Therefore, this paper provides a finite element method for analyzing its static mechanics characteristics in the state with
maximal stress and strain (i.e., the gripper opening largest, including the IPMC deformation, stress, and strain). Further,
these electromechanical coupling relationships can be simulated by using the piezoelectric analysis module based on ANSYS
software. The simulation results show that the maximal tip displacement of IPMC strips can nearly reach their own free length,
the maximal stress is 54 MPa in the center of copper electrodes, and the maximal strain is 0.0286 on the IPMC strip. The results
provide detailed numerical solutions and appropriate finite element analysis methodologies beneficial for further research
on the optimization design, forecast analysis, and control field. 相似文献
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基于有限元分析的结构优化设计方法 总被引:7,自引:0,他引:7
提出了利用ANSYS优化分析功能对结构进行优化分析的方法,通过十杆桁架的优化分析介绍了用有限单元法解决实际问题,实现优化设计的全过程,说明了用ANSYS优化分析功能实现结构优化分析的可行性,从而为其它复杂结构的优化分析提供了新的方法和科学依据。 相似文献