All of the aerodynamic force must be produced in the absence of any incident flow, meaning lift can only be produced by the powered reciprocating motion of the wing.
所有的空气动力都必须在缺乏任何迎流的情况下产生，意味着只可能通过翼的有动力作用的往复运动来产生提升。
A novel tubular linear reciprocating generator was proposed, In the generator, an annular permanent magnet was placed outside of tile winding and core. With the vibrating of the permanent magnet, the electro-motive force is generated in the winding, so the generator can apply low voltage direct circuit power for small devices.
设计了一种新型圆筒式直线振动发电机，采用永磁体外置式结构，绕组和铁心放置在内侧，利用永磁体的振动产生感应电动势，该型发电机可以为小型设备提供低压直流电源。
A full scale model of a reciprocating sliding system is established and meshed, which includes the friction force and actual boundary conditions.
发展一种利用商业有限元软件进行摩擦系统全模型摩擦噪声预测的方法，可以对包括摩擦力和真实边界条件下的摩擦系统的复特征值进行分析，提出进行摩擦噪声预测的主要步骤。
One driving force for reciprocating with a lubricating oil and oil-free air-compressor series, displacement 1-100 cubic meters/minute, Pai pressure 0.2-2.5 MPa; momentum with a lubricating oil and oil-free screw compressor product line, Displacement 1.5-100 million cubic metres/minute, Pai pressure 0.5-1.0 MPa; and the use of nitrogen, nitrogen, hydrogen gas compressor product line.
其中动力用往复式有油和无油润滑式空压缩机系列，排气量1－100立方米／分钟，排压0.2－2.5MPa；动力用有油和无油润滑螺杆压缩机产品系列，排气量1.5－100立方米／分钟，排压0.5－1.0MPa；以及工艺用氮气、氮氢气压缩机产品系列。
The basic equations of theunsteady flow of second-order fluid with variable coefficients in the eccentric annuluswith inner cylinder reciprocating axially are established in bipolar system, and thesparse system of the linear equations is numerically solved. The formula of resultantforce acting on the inner cylinder moving axially in eccentric annulus by theviscoelastic fluid is given, and the force is numerically calculated. Moreover, theinfluences of the eccentricity, stroke and frequency of the inner cylinder on themagnitude and direction of the resultant force are analyzed.
本文采用了变系数二阶流体本构方程来描述聚驱井产出液的粘弹性流变性；建立了双极坐标系下变系数二阶流体在内管做轴向往复运动的偏心环空中非定常流的基本方程，并进行了数值求解；给出了偏心环空中做轴向运动的内管所受粘弹性流体作用力的计算公式，数值计算了内管所受粘弹性流体的作用力，并分析了偏心度、内管冲程、冲次等因素对作用力大小及方向的影响。
The quadratic reciprocating inertia force balancing mechanism is designed to obtain low vibration and noise.
自行设计了二阶往复惯性力平衡机构，在提高转速的情况下，实现了整机的低振动和低噪声以及平稳的运转性。
At the same time, the configuration of four-cylinder engine determine that it can not eliminate the influence of two order reciprocating inertial force by it`s own balance.
根据四缸发动机的运动学分析可知，二阶往复惯性力的平衡是解决四缸发动机振动问题的关键。
In view of the two problems, the reciprocating inertial force of pistons and cam longitudinal force are analyzed from the aspect of dynamics, and the conditions are obtained that make the engine and cam longitudinal force balance.
从动力学角度对活塞组往复惯性力和凸轮轴向受力进行分析，得出了发动机的整机平衡条件以及凸轮轴向受力平衡的条件。
Like other elastic system, it causes torsional vibration under actuating actions such as piston pressure, weight of moving parts, reciprocating inertia force, resistance moment during driving.
该系统如同其它弹性系统一样，在发动机燃气爆发压力、运动件质量及其往复惯性力和行驶阻力矩变化等激振作用下，产生扭转振动。
Under the working conditions, crankshaft bears complicated alternating load, such as constantly changing periodic gas force, reciprocating motion weight inertia force, rotational and centrifugal inertia force, tensile, compression, bending load etc, generates torsion and transverse and vertical vibration therefore.
在工作过程中受到周期性不断变化的气体力、往复运动质量惯性力、旋转与动离心惯性力和拉、压、弯曲等复杂交变载荷，产生扭转和横向、纵向振动。
Influence of reciprocating force of inertia on in-line internal combustion engine transient speed
直列式内燃机往复惯性力对瞬时转速影响的仿真研究
As one of the most important parts, connecting rod endures the power thrusts from piston pin with its magnitude and direction change periodically, the inertia force caused by swing of connecting rod and the reciprocating inertia force of piston group.
作为发动机重要零部件之一，连杆在工作过程中承受着大小和方向都呈现周期性变化的活塞销传来的气体作用力、本身摆动造成的连杆惯性力以及活塞组的往复惯性力。
According to kinematics and kinetics analysis, in the same working condition, the reciprocating inertial force of piston group in this new concept ICE is only 1/9 of that in conventional ICE, and inertial force lasting period is only 1/5 of conventional ICE.
由机构运动学和动力学分析可知，在相同条件下，活塞组往复惯性力，新概念内燃机只有传统内燃机的1／9左右，且作用时间只有约1／5；
The utility model enables the slide handle and active force plug to undergo linear reciprocating motions via the'T'plate and connecting rod rotated on the base axle.
本实用新型通过支座轴上转动的丁字板和连杆，使连接其上的滑柄和活动凸模进行直线往复运动。
Make the electromagnet attached and fixed to the sheet iron through magnetizing to produce the friction force in the reciprocating motion.
充磁，使电磁铁吸附在铁板上，产生之后往复运动时的摩擦力。
In order to solve the two-steps reciprocating inertia force of the traditional inline-four diesel engine which is difficult to balance, the paper adopted a new type of the crankshaft and the cylinder type, the angle of cylinder and crankcase are fixed up as V type of90 °.
为了解决传统直列四缸柴油机二阶往复惯性力难以平衡的问题，本文采用了一种新型曲轴及气缸排列方式，气缸及曲拐夹角均为V型90。
The first order reciprocating inertia force can be reduced by means of adopting a single balancing shaft and designing the crankshaft balance weight right.
采用单平衡轴和对曲轴配重合理设计的方法降低单缸摩托车发动机的一阶往复惯性力。
Reciprocating piston engine is the main power source of motor vehicle and the rigid body vibration and elastic vibration are caused by its natural combustible gas pressure、output torque of periodic fluctuations、the unbalanced inertial force (moment).
往复式活塞发动机作为机动车辆的主要动力源，其固有的燃气压力、输出转矩的周期性波动、不平衡惯性力（矩）必然会引起发动机本身的刚体振动和弹性振动。
Diverter becomes steering wheel's rotation steering arm's swinging or the rack axis straight reciprocating motion, and to changes the control force to carry on the enlargement the organization.
转向机的作用是通过方向盘的旋转，改变转向臂的位置或者齿条轴向循环直线的位移，以达到扩大系统控制力的目的。
As one of the most stringent components in diesel engine, piston transfers the driving force during its high-speed reciprocating motion and withstands high mechanical load and thermal load.
活塞是柴油机工作条件最苛刻的部件之一，它在高速往复运动中传递着整个柴油机的原动力，承受着极高的机械负荷和热负荷。