查询词典 component force

In this thesis, the influence of column force, joint hoop reinforcement, and repeat load on the stress and sheer bearing capability of inclined pressure bar is analyzed utilizing finite element software. In the case study, the column axial force's influence on the inclined pressure bar's equivalent width, stress and sheer bearing capability of RCFEN is obtained by changing the column force when modeling the RCFEN with ANSYS. In the former model, the joint hoop reinforcement influence on the equivalent width inclined pressure bar and the strength of RCFEN is achieved by changing the quantity of joint hoop reinforcement; the inclined pressure bar's equivalent width and the strength variation of RCFEN under cyclic load are gained by applying low frequency cyclic load on the inflection point of column and the middle of beam.

针对上述算例中的框架外节点采用ANSYS进行建模，运用有限元软件分析了柱轴力、节点箍筋、反复荷载对外节点斜压杆承载力、抗剪承载力的影响：改变柱轴力，研究了柱轴力对斜压杆的等效宽度、框架外节点斜压杆承载力、框架外节点斜压杆抗剪承载力的影响；在上述模型中，改变节点箍筋的数量，分析了节点箍筋对斜压杆的等效宽度、框架外节点强度的影响；在上述模型中，在柱反弯点和梁中点均进行低周反复加载，讨论了在反复荷载作用下，框架外节点的斜压杆的等效宽度、框架外节点强度的变化情况。

Railway bridge ; braking force ; theoretical analysis ; dynamic calculation ; real-bridge test ; maximum braking force ratio ; effective braking force ratio

铁路桥梁；列车制动力；理论分析；动力计算；实桥试验；最大制动力率；有效制动力率

Aiming at this problem, firstly, calculation formulae of utilization adhesion coefficient after installment of retarder were detailedly deduced. Then braking force distribution ratio , braking intensity and vehicle full-load parameters were taken as variables and inequalities which are about of retarder braking force , braking force distribution ratio , braking intensity and vehicle full-load parameters were established based on the ECE Law. The range of corresponding to any , as well as the most optimal matching between them, were obtained by solving these inequalities.

为此，论文在推导了安装缓速器后前、后轴利用附着系数、的计算公式基础上，基于ECE法规要求，以制动力分配比、制动强度及车辆满载参数为变量，建立了缓速器制动力关于车辆制动力分配比、制动强度和满载参数之间的多元不等式组，通过求解多元不等式组获得缓速器制动力与制动力分配比之间的取值关系，并从中得到二者之间的最优匹配。

First, the angular velocity function and maneuver load for certain maneuver flight (including hover, dive-hike and these two combined) are set up. The simulation results of the vibration of double-disk rotor system with cantilever supported on rigid bearings show that rotor would be apparently deformed under maneuver load. Second, the performance of oil force of SFD in maneuver flight is analyzed. The results show that in maneuver flight, the SFD with centering spring will become eccentric and its oil force will be time-related and offset-related. Then, SFDs are introduced into typical Jeffcott rotor system. The whole system will be statically displaced in maneuver flight and the nonsynchronous components of oil force appear in the response of rotor system.

首先，建立了水平盘旋、俯冲拉起及盘旋+俯冲拉起复合机动三种机动飞行条件下的机动角速度函数，并确定了对应机动飞行条件下的机动附加载荷(附加离心力和附加陀螺力矩)，分析了带刚支的双盘悬臂转子系统在机动飞行条件下的振动特性，发现发动机转子在机动飞行时会发生明显变形；随后，分析了非定心挤压油膜阻尼器的油膜力特性，机动飞行时，油膜轴颈在机动附加载荷的作用下偏离外环中心，使得带定心弹支的挤压油膜阻尼器也变成了非定心挤压油膜阻尼器，其非定心挤压油膜力是瞬态时变的，并且与SFD油膜轴颈偏移量和进动形态有关；然后，在经典的Jeffcott转子系统中引入带定心弹支的挤压油膜阻尼器，分析了机动飞行时非线性转子系统的振动特性，发现挤压油膜阻尼器油膜力的非协调特性也反映到转子系统的振动响应中；之后，对机动飞行条件下带挤压油膜阻尼器的双盘悬臂转子系统的振动特性进行了分析，并重点分析、总结了俯冲拉起机动飞行时，系统结构参数和工作状态参数(转速比、机动飞行半径、机动角速度等)对该系统振动特性的影响。

Drilling track is key factor which decide trenchless success or failure , but controlling drilling track stay around rectifyed phase at the present .guided the theory of force is the key affectting the drilling track ,the paper discuss primary factors on contralling drilling track ,and advance the formulary ahout reckoning deviation force and azimuth force ,expect to achieve the aim that drilling track were controled real time and be anticipated , and have the initiative on drilling track contaolling .

岩层钻进轨迹是决定非开挖成败的关键因素，目前对钻孔轨迹的控制仅仅停留在被打纠偏层面上，本文在力是影响钻进轨迹本质因素理论指导下，对影响岩层钻进轨迹控制的因素进行了理论探讨，并针对造斜力和变方位力提出了计算模式，希望最终能实现钻孔轨迹的实时监控与调整，变被打纠偏为主动钻进。

From the governing equations satisfying the balance between pressure gradient force, inertial centrifugal force and viscous force, the threedimensional velocities of tornado are obtained, and then its funnel structure is depictured theoretically. It shows that the funnel structure consists of vertex flow and jet flow.

本文用气压梯度力、惯性离心力、黏性力三力平衡的柱坐标下的大气动力和热力学方程组，求龙卷风的三维速度场，从理论上绘制出龙卷风的三维漏斗型结构。

We find that in our model, when the applied force exceeds 0.03, the relationship between force and extension is linear, i.e. force dominates the elastics.

在我们的模型中，当外力超过0.03时，力跟伸长将成线性关系，即外力将占主导地位而熵效应较小。

The method is as follows that the two ends of a nanometer are fixed on two pivots and an axial micro-pulling force T is applied on the nanometer; an electrode is arranged on the middle part of the side of the nanometer and an alternate voltage is applied on the electrode to motivate the nanometer to generate resonance, and therefore, the natural frequency f of the nanometer is measured and acquired; according to the material characteristics and the geometry characteristics of the nanometer as well as the boundary condition of the nanometer material, the relation between the natural frequency and the axial pulling force of the nanometer, namely the f-t curves of the nanometer, can be calculated by a vibration equation; according to the measured natural frequency f, the size of the micro-pulling force T can be acquired.

该方法将一根纳米材料的两端固定在两个支点上，给纳米材料施加一个轴向的微小拉力T；在纳米材料的侧面，位于该纳米材料的中部放置一个电极，在电极上施加一个交变的电压激励纳米材料使其发生共振，测得纳米材料的固有频率f；根据纳米材料的材料特性和几何特征以及纳米材料的边界条件，由振动方程计算出该纳米材料的固有频率与所受的轴向拉力的关系，即纳米材料的f-T曲线；根据上述测得的固有频率f，得到微小拉力T的大小。

The feed motion is projected into each feed axis, and based on its mechanical model(motor driving torque/force, Inertial force and cutting force), the constraint relationship between feedrate, feed acceleration, and feed drive capabilities and toolpath geometric characteristics is derived. With this constraint model, the acceleration and deceleration of each axis can be limited within its capability.

将进给运动分解到各运动轴，根据机床进给轴的力学(电机驱动力／力矩、进给系统所受的惯性力及切削力)模型，推导了多轴联动加工时进给速度、加速度与各进给轴驱动能力以及加工路径几何特性之间的约束关系，使得加工过程中机床各运动轴的加减速始终处于其加工能力范围内。

The paper describes how the local force of the main web is considered as the force caused by the Contact pressure among the trolley wheel, rail and top flange, and how the contact analysis model for the local force is built by means of both Hertz theory and finite element software ANSYS combined. Also, it analyzes the variation of the local stress under the different conditions and comes to a conclusion, and compares the results derived from the experimental formula with the result from ANSYS.

本论文的主要内容：将Hertz接触理论和有限元软件ANSYS结合起来，把主腹板的局部受力问题视为小车轮与轨道及轨道与上翼缘板之间发生接触行为作用下的受力问题，建立了小车轮压作用处偏轨箱形梁主腹板局部受力的接触分析模型，研究不同情况（小车轮压、箱形梁几何参数和轨道截面惯性矩）下局部应力的变化规律，得出相关结论；最后将经验公式解与ANSYS数值解进行对比分析论证。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。