1) power concentration
动力集中
1.
At a speed lower than 300km/h, both power concentration andpower distribution could apply, while at a speed higher than 300km/h, power distribution is preferred.
在此速度之下,动力集中与动力分散两种方式都能适应;在此速度之上,动力分散为佳。
2) centralized power
动力集中
1.
From the aspect of how to make use of the adhesion in the most effective way,the advantages and shortcomings of the separated power and centralized power are discussed.
从如何最有效利用粘着特性的角度出发 ,论述了动力集中方式与动力分散方式的优缺点。
2.
This paper begins with the comparison of proportion and revenue of railway passenger and freight transport in Japan and European countries,in connection with the systematic characteristics of European high speed trains,the performances and development in the future of trains with the centralized power of locomotives,EMUs with the separate power and tilting trains are analyzed.
从日欧各国铁路客、货运输所占比重及收入比较出发 ,结合欧洲高速列车系统特点 ,分析了动力集中型机车牵引列车、动力分散型电动车组以及摆式列车性能及今后的发展方
3) dynamic stress concentration
动应力集中
1.
An analytical solution for dynamic stress concentration of underground cavities under incident plane P waves;
平面P波入射下地下洞室群动应力集中问题解析解
2.
Scattering of SH-wave by a shallow buried elliptic cylindrical cavity and dynamic stress concentration;
平面SH波在浅埋椭圆柱形孔洞上的散射与动应力集中
3.
Scattering of SH-wave and dynamic stress concentration in elastic medium with a cylindrical inclusion
介质中夹塞物界面处的SH波散射与动应力集中
4) dynamic stress concentration factor
动应力集中因子
1.
The dynamic stress concentration factor is determined by using time-distributive function of energy density,and the corresponding procedure is provided.
3 m方孔的弹性板,在正压和负压三角爆炸载荷作用下的应力响应进行了分析,利用能量密度时间分布函数(TDFED)确定了动应力集中因子,并给出其计算步骤。
2.
The dynamic stress concentration factor is determined by using time-distributive function of energy density,and the emphasis is placed on discussing the effect of two parameters on the result :one is the time step used in the calculation and the other is the time intervel during whic.
3 m方孔的弹性板,在下三角爆炸载荷作用下的应力响应进行了分析;利用能量密度时间分布函数(TDFED)确定了动应力集中因子,重点讨论了时间步长和采样时间间隔对计算结果的影响。
3.
A simple and effective approach based on time-distributive function of energy density was developed to calculate the dynamic stress concentration factor.
3m方孔的开孔板和无孔板对应点在两种下三角爆炸载荷作用下的应力响应进行了分析;由开孔板和无孔板边对应点的主应力时程曲线,对提出的能量密度时间分布函数的绝对值平方进行变上限积分,按其比值确定动应力集中因子,该方法简单易行。
5) dynamic stress concentration factor(DSCF)
动应力集中系数
1.
Numerical examples are provided to discuss the amplitude of displacement on the surface,as well as the dynamic stress concentration factor(DSCF) around the subsurface cavity and the homocentric hole.
通过理论求解,得出了问题的解析解答,文中最后给出了具体算例,讨论了地表位移幅值、浅埋圆孔及凸起所含圆孔的动应力集中系数。
6) dynamic stress concentration factor
动应力集中系数
1.
A numerical solution to the dynamic stress concentration factor was calculated in the following way.
采用Green函数法、复变函数法研究了SH波对界面附近含有半圆形脱胶的圆柱形弹性夹杂的散射,并给出了动应力集中系数的数值结果。
2.
Assistant function,complex function and multi-polar coordinate method are employed and numerical examples and relative discussion on ground motion and dynamic stress concentration factor(F_(DSC)) are provided.
通过具体算例,讨论半圆形沉积谷地表面上的地震动、浅埋圆形结构周边位移及动应力集中系数。
3.
Using Green s Function method, the problem of SH-wave scattering by cracks near a cylindrical hole is investigated, and the solutions of dynamic stress concentration factor was given.
采用G reen函数法研究SH波入射时在圆形孔洞附近存在裂纹的情况下圆孔散射动应力集中系数的求解。
补充资料：动力机械：内燃机动力学
研究内燃机运转中的力学现象的科学。其主要任务是研究分析内燃机运转时各主要零件的运动规律及其受力情况﹐用以作为内燃机零件设计﹑计算的依据。它还研究这些力对内燃机动力装置的影响及其消减方法。内燃机动力学的主要内容为曲柄连杆机构运动学﹑曲柄连杆机构动力学和内燃机平衡分析等。
曲柄连杆机构运动学 研究曲柄﹑连杆﹐尤其是活塞的运动规律。活塞作周期性往复运动时的位移
、速度
和加速度
可用下述各式近似求算
式中为曲轴转角﹔ 
为曲轴旋转角速度﹔
为曲柄半径﹔
为曲柄半径 与连杆长度
之比﹐即 ＝ /
曲柄作回转运动﹐连杆作复杂的平面运动。连杆的运动往往被简化分解为随活塞组的往复运动和随同曲柄的旋转运动。
曲柄连杆机构动力学 研究分析曲柄连杆机构(见曲柄滑块机构)在运动中力的生成﹑传递和输出。作用在曲柄连杆机构上的力有曲柄连杆机构运动时产生的往复惯性力和离心惯性力﹐以及内燃机气缸内的气体压力。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条