The main research contents and results embody as follows: According to the two typical drawing simulation of box part and cylindrical part, it is arrived a main method in improving sheet metal forming ability as follows: in the qualification of not initiating the wrinkle, brought more particle in fillet region into straight flange region, in the meantime cause the particle in the straight flange region run more distance towards the middle region which resistance is the minimal. A theoretical study of new technique is developed in sheet metal forming base on virtual power principle. The results indicate that decrease the equivalent stressσ, improve the lubricate state in contact surface, decrease the area, the normal contact stressσn and the equivalent strain velocityεin initial principal deformation region, adjust and optimize the particle cycle flow of work piece flange face will greatly increase the sheet metal draw ability in room temperature conditions. And drawing hole forming technology is araised based on the analysis above.
本文的主要研究内容和结果体现在以下几个方面：根据两个典型的拉深工艺盒形件和筒形件拉深的数值模拟结果，研究得出为提高板料拉深成形性能而应采取的工艺措施是，在不引发起皱的条件下，使得圆角区域中的质点更多地进入直边区域中，同时使直边区域中的质点、朝着流动阻力为极小的中部区域移动更大的距离；依据塑性力学的基本原理——虚功率方程，基于提高板料的成形性能的目的，对虚功率原理关系式中每项参数的变化，进行了深入的分析后得出，在覆盖件的拉深过程中，可通过适当的工艺方法与措施，减小等效应力σ，改善接触面上的润滑状态，减少初始主变形区的面积，减小主变形区的法向接触应力σn的量值，减小主变形区的等效应变速率ε，起到调节与优化工件法兰面上的质点的周向流动的作用，以此为基础，提出了拉深孔的工艺措施即拉深孔成形新工艺。
The method of machining different types of planar cams in the mode of centered translating structure is introduced in this paper. Steady speed grinding is realized in this mode. At the same time, the algorithm based on virtual synthetic velocity of linear moving and rotary speed is obtained in the condition of steady speed grinding.
介绍了在直动对心模式下，加工不同类型平面凸轮的方法，建立了在这种模式下实现恒速磨削的数学模型，提出了在恒速磨削条件下移动和回转速度的虚拟合成速度的概念和计算方法。
Geometric model of double cavity jaw crushers was established. Virtual model of the movement mechanism-crank and rocker mechanism and left-right broken cavities were simplied properly based on dynamical analysis software of ADAMS. Simulation study on kinematics characteristics of this mechanism was stated such as transmission angle of connecting rod and horizon and vertical displace of inlet and outlet of two broken cavities. Kinetics characteristics was also simulated such as velocity and acceleration of mobile jaw barycenter and vibrant force of rack.
在动力学仿真软件ADAMS环境下对双腔式破碎机的几何模型进行了适当的简化，建立了它的传动机构－曲柄摇杆机构以及左、右两破碎腔的虚拟模型，并对破碎机连杆传动角和两破碎腔进、排料口水平、垂直位移等运动学特性以及动颚重心速度、加速度和机架所受的摆动力等动力学特性进行了仿真研究。
In order to get virtual origin and friction velocity of riblet surface, experimental data is managed based on Musker flow velocity distribution formula.
为了获取脊状表面的虚拟原点和摩擦速度，尝试运用Musker全壁面律公式的回归拟合方法对实验数据进行处理。
The effects of frictional coefficient and blank holder force and virtual punch velocity on the formability of cross member deep drawing were discussed.
在此基础上讨论了摩擦润滑条件、压边力和凸模的虚拟冲压速度对板料拉深过程的影响。
The effect of virtual punch velocity on the simulation result was discussed.
对汽车底盘横梁拉深成形过程进行了数值模拟，对比分析了数值模拟结果与实验结果，同时讨论了凸模的虚拟冲压速度对数值模拟结果的影响。
The effect of punch virtual velocity and sheet virtual density on the sheet strain energy was studied in this paper.
从理论上分析了凸模虚拟速度和板料虚拟密度对薄板变形能的影响。
The virtual anode formation time and propagation velocity at different pressures with different cathode apertures are calculated.
对不同的气压和阴极孔径下虚阳极的形成时间和传播速度进行了模拟计算。
The inspecting codes programmed by LabVIEW is carried out on the client computer, and the signals of current and velocity are simulated by signal generator. The result on virtual oscillograph is of good agreement with the signal wave collected by server.
网络连接现场主机和远程PC客户机，在远程客户机上运行LabVIEW编写的监测程序，用信号发生器模拟电机的电流、速度信号，远程PC客户机上的虚拟示波器较好的复现了现场主机采集到的信号波形。
By adopting dynamic explicit finite element algorithm, dual mesh technique or virtual mass and velocity, the run time has ben reduced, and nonlinear boundary problems of contact and friction have been deeply studied.
新闻摘要：综述了环件冷辗扩成形模拟技术的最新进展：冷辗扩成形模拟已经由简化几何和材料模型的分析转向全面的三维分析，通过采用动力显式有限元算法、双网格技术、虚拟质量和速度等技术减少了计算时间，接触和摩擦等非线性边界问题得到深入的研究。
Facing these problems, the half-coupled conservation laws of energy for polar continua, conservation law of energy and Hamilton principle for micropolar multifield theories, principle of virtual velocity and dipolar velocity as well as of virtual stress and dipolar stress for solids with microstructure are proposed.
针对这些问题，提出了半耦合型的极性连续统能量守恒定律、微极多场耦合理论能量守恒定律和Hamilton原理与带有微结构的固体理论的虚速度和虚双极速度以及虚应力和虚双极应力原理等。
First, the reverse solution model of position, velocity and acceleration of parallel kinematic machine is deduced including parallelogram strut structure and the outer translation pair driving fashion. Based on the above, its rigid dynamic model is set up by using the virtual work principle.
首先导出了外移动副驱动，含平行四边形支链结构的并联机构位置、速度及加速度逆解模型，并利用虚功原理建立其刚体动力学逆解模型。
The accommodation coefficient in formula for virtual cutting depth of grain is calculated by the test. The ceramics material mostly is cut off on brittle regime, but it is cut off on half-ductile regime at 14N drive weight, 5.23m/s velocity of wire.
实验证明陶瓷材料切割主要为脆性加工方式，但在进给配重14N，锯丝速度5.23m/s时为半延性材料去除。
The actual experiment for measuring angular velocity and angular acceleration had been made in the 4-bar mechanism, which proved the superiority of the virtual instrument to the traditional instrument, and that the improvement can be made in the traditional instrument.
通过对四杆机构进行了实际的角速度角加速度测试实验，证明了该虚拟仪器具有传统仪器无法比拟的优势，能使传统仪器具有新的利用价值。
According to the ratio of kinematic energy to internal energy and the ratio of hourglass energy to internal energy, a criterion of virtual punch velocity selection was proposed.
根据系 统动能与内能的比值、沙漏能与内能的比值，提出了薄板成形动态仿真研究力学建模中虚拟凸模速度的选取准则。
The paper establishes movement virtual prototype model of planetary reducer, then carry on kinematics simulation, finally finally carries on the velocity ratio the confirmation.3.The research to rotational speeds on all levels to planetary reducer and gear meshing force.
建立行星减速器的运动虚拟样机模型，然后进行运动学仿真，最后进行传动比的验证。3.行星减速器各级的转速及齿轮啮合力的研究。
Three-dimensional velocity components and virtual temperature were measured using ultrasonic anemometer above an area by sea.
采用三维超声风速仪测量了近海边三维风速和虚温数据。
Virtual Instrument for Measuring Angular Velocity and Angular Acceleration Based on LabVIEW;
叙述了用速度瞬心法求导杆角加速度的新方法。
In this method, the rotating angular velocity of the " virtual armature magnetic flux " is taken as the dynamic fre - quency of the node.
此方法构想了一种虚拟电机，以它的电枢磁势的旋转角速度作为节点的动态频率。
This paper, by the principle of Virtual Work, put forward the Unit force method that is suitable for solving the kinematics problem. The velocity and acceleration of the point and direction appointed in the kinematics system may be found conveniently.
本文从虚功原理导出了适合于运动学问题求解的单位力法，可以很方便地求得运动学系统中指定点、指定方位的速度和加速度。