加速度

In this paper, the analytical expressions of seismic input for homogeneous elastic half-space are first derived in oblique incidence of plane SV-wave, and then a finite element model for a real hydropower cavern group composed of main powerhouse- transformer chamber- tailrace surge tank cavern is created. Characteristics of seismic responses such as displacement, acceleration and stress are studied in detail at different incidence angles and some results are compared with those given by the literature.

本文首先推导了平面SV波斜入射下均质弹性半无限空间的地震动输入表达式，然后建立了某水电站主厂房室-主变室-尾水调压室等构成的地下洞室群有限元模型，详细研究了不同入射角度下各洞室的位移、加速度、动应力等地震反应特点，并与文献进行了对比。

As shown by three-dimensional analysis of segmental stability, the specimens lost their stability after impact in high-energy group.

节段遭受爆裂骨折的破坏能量、撞击力可作为损伤阈值的有效指标，而撞击速度、加速度、速度及位移大小仅可作为损伤限量的参考值。

At first in the preliminary design this paper computes the linear damping coefficient of the viscous damper employed in this project using Composite Response Spectra approach, meantime, this paper proves that reducing the exponent of velocity of the piston can increase the magnitude of the dissipative energy, because of the viscous damper employed in the practical project character nonlinear behavior; next this chapter performs analysis and comparison between the building without and with the viscous dampers aforementioned when the building suffers from various Time Domain Response, from the angle of displacement, interstroy drift, velocity, interstory velocity, acceleration, energy, maximum axial force of the dampers and of the column etc., in order to prove that the incorporating the viscous dampers into the buildings has great superiority on enhancing its aseismic performance ; furthermore, this chapter also expatiates on diverse assembly form of the viscous dampers that results in the adverse impact on the internal force of the structural member in this building, on the ground of which this segment bring about the preference of the assembly form of the viscous damper; finally this chapter points out the sphere of application of the analysis and computation using Composite Response Spectra approach in design: it is available in well-proportioned stiffness structures and isn抰 available in the structures that contain weak story. It is recommendable, particularly, to incorporate the fluid viscous dampers into this structure that contain weak story to refrain earthquake and reinforce, such as the Central Hall of Shanghai Exhibition Hall.

首先使用了反应谱分析法设计出欲附设的粘滞阻尼器的线性阻尼系数，由于实际工程所用的粘滞阻尼器具有非线性的特性，故而笔者又证明了降低速度指数对提高粘滞阻尼器的耗能量的优势所在；接着分别从位移、层间位移、速度、层间速度、加速度、能量、最大阻尼出力和柱轴力等不同的角度对结构在附设粘滞阻尼器前后的时程反应进行了分析对比，籍此在实际工程中证明了附设粘滞阻尼器对于提高结构的抗震性能的优越性；再者，笔者还阐述了采用不同的粘滞阻尼器布置方式对结构中构件内力特别是柱轴力和基座竖向反力产生的不利影响，并在此基础上提出了布置方式的优选；最后，指出了反应谱法在设计中的适用范围：对于均匀结构反应谱法能够使用，而对于含有薄弱层的结构反应谱法并不适用；对于类似于上海展览馆中央大厅的含薄弱层的结构尤其值得使用粘滞阻尼器的方法进行抗震加固。

Zeno paradox ; acceleration ; uniform motion ; impact process

广义芝诺悖论；加速度；匀速运动；碰撞过程

Acceleration ; Kidney ; Wounds and injuries ; Recovery of function ; Urinalysis ; Pathology

加速度；肾；创伤和损伤；功能恢复；尿分析；病理学

According to the moving characteristics of tracklayer, when the vehicle is on ramp and the ground's vertical pressure is linear, the calculating formulas of relationship between the deviation of the instantaneous steering center, the position of vehicle's gravity, steering radius, moving velocity, moving acceleration, and vehicle's orientation, were obtained by the theory and method of vector analysis in mathematics and mechanics.

摘要根据履带式车辆的运动特点，运用数力学中矢量分析理论和方法，推导了接地比压为线性分布时履带式车辆在斜坡上转向时，瞬时转向中心偏移量与车辆重心位置、转向半径、行进速度、加速度、车辆方位相互关系的计算公式。

This paper makes a analysis of E7/4 combers on tongs plate's displacement, velocity, acceleration, the setting of carding and pressurization mechanism ,and on the basis of above, it studies the movable characteristic of tongs plate mechanism of E7/4 combers and the effect on output ,quality by combers.

通过对E7 4型精梳机钳板前后摆动的位移量、位移速度、加速度、梳理隔距及加压机构等有关参数的计算，分析探讨了E7 4型精梳机钳板机构的运动特性及钳板机构对精梳机产量和质量的影响

This algorithm provides a more continuous feed motion using C2 continuous derivatives and nearly-arc spline parameterization.

该算法采用二阶连续可导的五次样条和近弧长样条参数提高了进给运动的连续性；速度控制算法保证机床在高速运行过程中加加速度的二次连续、加速度、速度和位移与时间关系的高阶连续变化，并且保证在各自的约束范围内，从而使机床的运动平稳，避免产生大的冲击和振动，同时有利于提高加工质量，减少加工时间。

And it can perform test to meet impact speed, acceleration and force parameters requirements.

试验设备主要测试依据标准要求施加在保险杠上的冲击速度、加速度、力等技术参数。5。

The new type four-channel downhole test gauge is a special multi-parameter instrument which is used to test the whole process of perforation and crack, by which variational curve of pressure, acceleration, temperature and the voltage of batteries can be measured and collected simultaneously.

新一代石油井下测试仪是用来测试整个射孔和压裂过程数据的多参数专用仪器，可同时记录压力、加速度、温度和电池电压的变化曲线。

I was up all night because I was in pain, she said.

我整夜，因为我在疼痛，她说。

A crow caws /craoks.

乌鸦叫。 51-论文网