运动方程

The kinematic model of vibration system is established and the kinematics differential equations are obtained. On the basis of analyzing unbalancing response, the plane separation equations are achieved.

建立了该振动系统两自由度摆动的动力学模型，得到其运动微分方程，进行了不平衡响应分析，获得求解校正质量的平面分离方程。

The dynamics equation is established using Lagrange method, and the formula of free frequency is deduced according to modality analysis of general viscous damp. Instantaneous wallops are applied to X, Z dimension respectively, observing the movement of the moving platform, and use ADAMS software to validate the free frequency of the system.

采用Lagrange方程建立了系统动力学方程，根据一般粘性阻尼系统的模态分析法，推导了求解固有振型的公式；分别在X、Z方向上施加一定的瞬时冲击力，观察动平台的运动情况，并采用ADAMS软件验证系统的固有频率。

Base on nonlinear electro-magneto-elastic soupled dynamic equations of the plate and the expression of electromagnetic forces, the vibration equations of the thin beam plate under uniform transverse magnetic field and mechanical loadings are obtained.

在给出薄板的非线性电磁弹性耦合运动基本方程及电磁力表达式的基础上，得到了横向稳恒磁场和机械载荷共同作用下梁式薄板的振动方程。

The RV reducer,which is a planetary gear system with cycloidal gears in contact with pin type internal gear teeth and involute gear pair,has been widely used as reduction gears of industrial robots, By reason that robots are very strict with vibrations,a dynamic model of RV reducer is developed.

建立RV减速器的动力学模型并推导运动微分方程，通过求解振动方程得到系统的固有频率，并就针轮齿数对RV减速器振动的影响等进行了研究，得到对RV减速器的设计和应用具有指导意义的结论。

By field and indoor test, the paper measures soil physical property, soilmoisture constant and soil water movement parameter, provides the soil specificgravity , the soil apparent density, the soil fraction, the soil field moisturecapacity, the soil saturated moisture capacity, the soil percent moisture content ofcom germination and seedlings emergence, the corn wilting point, and alsoestablishes the equation of soil water retention curves, the equation of soil waterdispersion coefficient and the relationship between pressure and soil apparentdensity, and so those provides the parameter for numerical simulation.

通过田间和室内试验，测定了供试土壤的物理性质、土壤水分常数和土壤水分运动参数，得到了该土样的比重、容重、机械组成、田间持水率、饱和含水率、玉米种子发芽出苗土壤含水率、玉米凋萎系数，给出了土壤水分特征曲线方程、土壤水分扩散系数方程及土壤容重与土壤压紧力的关系，提供了数值模拟过程中所需的参数。

In this paper, based on the volume balance equation of water, adopt IPARM method to estimate the soil permeation parameters of Kostiakov-Lewis equation in furrow irrigation, according to a set of field furrow irrigation data to estimate the parameters, and utilizing WinSRFR1.1 software to simulate the water flow in furrow irrigation.

该文以水量平衡方程为基础，采用IPARM方法建立了沟灌Kostiakov-Lewis入渗方程中参数的估算方法，并根据一组田间实测沟灌资料对入渗参数进行了估算，利用WinSRFR1.1软件对沟灌水流运动进行了模拟。

In this paper, based on the water balance equation, infiltration parameters from advance and runoff model method was used to estimate the soil permeation parameters of Kostiakov-Lewis equation in furrow irrigation, according to a set of field furrow irrigation data to estimate the parameters, and utilizing WinSRFR1.1 software to simulate the water flow in furrow irrigation.

该文以水量平衡方程为基础，采用IPARM方法建立了沟灌Kostiakov-Lewis入渗方程中参数的估算方法，并根据一组田间实测沟灌资料对入渗参数进行了估算，利用WinSRFR1.1软件对沟灌水流运动进行了模拟。

The thrust coefficients and propulsive efficiency of a two-dimensional flexible fin with heaving and pitching motion were computed using FLUENT. The effect of different locations of the pitching axis on propulsive performance was examined using three deflexion modes which are respectively, modified Bose mode, cantilever beam with uniformly distributed load and cantilever beam with non-uniformly distributed load.

利用FLUENT软件数值计算了二维柔性鳍作升沉纵摇运动时的推力系数及推进效率，探讨了修正Bose变形方程、均匀载荷和非均匀载荷悬臂梁变形方程等三种柔性模式下纵摇轴位置对摆动鳍推进性能的影响，其中纵摇轴在尾缘处能够获得更大的推力，而最高的推进效率分别对应修正Bose模式下纵摇轴距首缘1/3弦长处和悬臂梁柔性变形模型下纵摇轴距首缘2/3弦长处。

For the purpose of simulating aerodynamically determined body motion, the governing equations of rigid body dynamics are coupled in the overall solution algorithm.

本文还研究了刚体动力学方程与流动方程的耦合求解方法，用于模拟由气动力决定的物体运动轨迹。

Mechanical models and differential equations of motion for high speed pantographs;2. By the principle, differential equations of motion for variable-mass nonholonomic systems constrained to the fixed axis rotation are obtained.

建立了变质量力学系统在定轴转动参考系中的Jourdain原理，由此得到了受定轴转动约束的变质量力学系统运动微分方程，给出了准坐标形式，最后举例说明方程的应用。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐