1) critical ventilation speed
临界通风速度
1.
Based on the analysis of the variation law of smoke flow in subway platform fire,a concept about critical ventilation speed from platform to concourse was presented.
在分析了地铁站台火灾时烟气流场变化规律的基础上,提出了临界通风速度的概念。
2) critical ventilation velocity
临界通风流速
3) critical velocity
临界风速
1.
Numerical simulation and analysis of smoke characteristics and critical velocity in underground railway tunnel while fire;
地铁隧道火灾烟气特性与临界风速的数值模拟分析
2.
Furthermore, a critical velocity of air flow expression for transition from upward smoldering to flaming combustion is constructed.
根据在此条件下的阴燃特点,建立了稳定阴燃时实验材料内部的气流速度模型和阴燃向有焰火转化时的临界风速判定表达式。
3.
The model for calculating the critical velocity in a tunnel cross-passage is established on the basis of the critical Froude theory.
从临界Froude数理论出发建立了计算联络通道临界风速的模型。
4) critical wind speed
临界风速
1.
Based on vibration theory,this paper presents concise methods for critical wind speed,Vcr,at which tube members start the aeolian vibration,and resonance force calculations,and analyzes the influences of resonant bending and fatigue stress on safety of web and auxiliary members that are subject to the aeolian vibration.
文章根据振动理论给出微风振动钢管构件的起振临界风速Vcr和共振力的简明计算方法,分析了共振产生的弯曲和疲劳应力对易发生微风振动的杆塔斜材和辅材结构安全性的影响。
2.
The three-series solution is taken up to the nonlinear differential equation of the galloping movement caused by the cross wind force acting on a high-rise structure, thus giving a reduced 3D expression in terms of steady-state response and critical wind speed.
应用三级数法求解横风向的弛振的非线性运动微分方程,得到了三维结构的简明的稳态响应和临界风速表达式。
3.
At the same time,it analysis relative factors of smoke control in the tunnal, and gives the critical wind speed of smoke control in the typical tunnel.
在分析目前国内外地铁隧道火灾人员疏散方式的基础上 ,建议采用提高疏散效率且基本不增加投资的侧向疏散平台加联络通道的疏散方式 ,同时分析了隧道烟气控制的有关因素 ,给出了典型隧道烟气控制的临界风速 (危急空气流速
5) critical wind velocity
临界风速
1.
Natural characteristics of long span cable stayed bridges and calculation of its critical wind velocity of flutter;
大跨度斜拉桥的动力特性及其颤振临界风速的计算
2.
In order to determine critical wind velocity of mem- brane at first order instability, further vortex sheet on membrane is use.
为了确定薄膜一阶失稳时的风速,进一步用涡旋面代替风与薄膜表面之间的微小厚度边界层来推导薄膜表面所受的气动力表达式;同时用有限形式的正弦波近似模拟薄膜一阶失稳构型,通过能量守恒原理和牛顿法迭代法求解薄膜振动的最大幅值;根据气动力与薄膜自重和惯性力之间的动力平衡关系获得了薄膜一阶失稳时的临界风速。
3.
The determination of the critical wind velocity is one of the main targets.
失稳临界风速的确定是其主要内容之一。
6) critical velocity
临界速度
1.
The predicted pressure drop per unit length was compared with the experiments as a result that a critical velocity at which the wall slip begins was obtained and that the relationship .
计算得出水煤浆在管道中流动产生滑移的临界速度,并得到临界速度与管径的变化关系。
2.
The dynamic stress, strain and displacement of the windshield are obtained, and the critical velocity when the windshield failure is also gotten on the FE analysis.
并对某型号风挡进行了鸟撞动响应分析,得出了鸟的运动轨迹和风挡的位移、应力、应变响应以及风挡玻璃的鸟撞临界速度,经与试验结果比较,两者吻合较好。
3.
In radial ultrasonic grinding, the contacting state is discontinuous and the critical velocity accords with the existing vibration cutting theory.
径向超声振动磨削与纵向超声振动磨削 ,其主要差别是磨粒与工件的接触状态不同 ,在径向超声振动磨削中 ,磨粒与工件的接触是间断性的 ,它的临界速度特征符合现有的振动切削理论 ,而在纵向超声振动磨削中 ,磨粒与工件是永久性接触 ,不存在磨粒与工件表面分离的特点。
补充资料：临界流态化速度
分子式：
CAS号：
性质：又称临界流态化速度。在流态化状态下相应的流体速度。所谓流态化状态是指这样一种状态，即在直立的容器内加入颗粒状固体物料，控制流体以一定速度由底部通入，使其压力降等于或略大于单位截面上固体颗粒的重量，固体颗粒即呈悬浮状态运动而不致被流体带走，其上部具有一个水平的界面。
CAS号：
性质：又称临界流态化速度。在流态化状态下相应的流体速度。所谓流态化状态是指这样一种状态，即在直立的容器内加入颗粒状固体物料，控制流体以一定速度由底部通入，使其压力降等于或略大于单位截面上固体颗粒的重量，固体颗粒即呈悬浮状态运动而不致被流体带走，其上部具有一个水平的界面。
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