下坡隧道临界风速会稍大于水平隧道的临界风速。
For tunnels with a downhill slope the critical wind velocity is somewhat greater than for the corresponding horizontal tunnel.
针对不同的火灾荷载，研究了临界风速随火灾强度的变化关系。
According to different fire loads, studies the changing relation between the critical velocity and fire intensity.
提出了一个新的求弛振的临界风速计算的简便公式，并给出了算例。
A simple expression for calculating the critical wind speed to excite the galloping oscillation of the structure was formulated, and exemplified by calculations.
通过试验得到了涡激振动的临界风速，并分析了栏杆、风攻角对涡激振动的影响。
Through experiments, the critical wind speed of the vortex-induced vibration is received. And analyzed effect of the railing and the wind attack angle on the vortex-induced vibration.
气动导数是大跨桥梁结构颤振和抖振分析中确定颤振临界风速和抖振响应的重要依据。
Flutter derivatives play very important roles for determining the flutter critical wind speed and buffeting responses of long-span Bridges.
有关研究显示桥梁最低颤振临界风速可能发生在平均风与桥跨成某一偏角的斜风情况。
Some research show the lowest flutter critical wind speed may occur in skew wind case.
气动导数是大跨桥梁结构颤振和抖振分析中确定颤振临界风速和抖振响应的重要依据。
In this paper, the flutter derivatives of a thin plate model under the simultaneous actions of wind and rain are identified by using the Covariance-Driven Stochastic Subspace Identification method.
研究发现：扁平箱形断面桥梁的颤振临界风速与风偏角的关系明显地受到风攻角的影响。
The studying of the different sections deck shows: the variation pattern of flutter critical wind speed of bridge with flat box deck and wind yaw Angle is significantly affected by wind attack Angle.
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。
The wind velocity of first order instability is obtained from the dynamic equilibrium relationship between aerodynamic force with dead weight and inertia force of membrane.
以偏微分方程稳定性的判别为依据，提出了临界风速的概念用来判定导线舞动的稳定性。
Based on the stability of differential equation, a concept of critical wind was introduced to estimate the stability of galloping.
在坡度隧道中，由于火风压的作用，临界风速与水平隧道临界风速相比会有一定的差异。
The critical wind velocity in sloping tunnels will be different from horizontal tunnels due to the stack effect.
分析现行规范规定的数据，用临界风速公式进行计算得出区间隧道风速不满足通风要求。
This paper indicates that tunnel airflow velocity defined in the existing code for the design of metro doesn't satisfy the requirement of tunnel ventilation in case of fires.
所导出的临界风速公式结构简单、未知参数容易确定，便于对临界风速的预测，可以用来推广使用。
The derived formula of Critical ventilation velocity is simple and easy to determine the unknown parameters which help predict Critical ventilation velocity and can be promoted.
当头部形状或开槽宽度不合适时，中间开槽不但不能提高颤振临界风速，反而降低了断面的颤振稳定性。
When the head's shape or width of central slot is unsuitable, central slot decreases critical flutter wind speed instead of increasing it.
以某悬索桥设计方案为工程背景，应用多模态颤振分析方法，分析了该桥架设阶段颤振临界风速的发展趋势。
A suspension bridge project is taken as an example, in which the evolution of critical wind speed of flutter during bridge erection is studied by a multi-mode flutter analysis approach.
最后，对成桥运营阶段确定了颤振、驰振临界风速以此来做为稳定性的判断依据，并重点进行脉动风场的抖振响应分析。
Finally, to determine the bridge flutter, galloping and buffeting critical wind speed as a method of judging the stability, buffeting response analysis is the key point.
临界风速是隧道烟气控制的关键所在，其指隧道火灾过程中能有效控制烟气于火源下风方向而不发生逆流的最小纵向通风风速。
As a key to tunnel smoke control, the critical velocity refers to a minimum vertical ventilation velocity which can effectively control the smoke under the direction of fire source without reversing.
风速达到每小时111英里至130英里(179公里至209公里)，三类风暴被认为超过临界值进入“热带气旋”状态。
With winds of 111 to 130 miles (179 kilometers to 209 kilometers) an hour, a Category 3 storm is considered to have crossed the threshold into "major hurricane" status.
研究结果表明：青藏高寒铁路临界翻车风速随海拔升高而增大，而随冻土路基病害出现而降低的规律。
The result indicates that the critical wind speed of vehicle turnover increases with the elevation of the altitude and decreases with the appearance of roadbed disease at frozen soil area.
计算结果表明，青藏铁路临界翻车风速随海拔升高而增大，随冻土路基病害出现而降低。
The result indicates that the critical vehicle turnover wind speed increases with the rise of elevation and decreases with the appearance of roadbed disease of frozen area.
临界融冰电流随着风速的增大而增大、随环境温度的降低而增大，而与冰层厚度的大小关系不明显。
Critical current of ice-melting increases along with the increase of wind speed and the decrease of temperature increase, while the size and thickness of ice is not obvious.
同时，说明了污染物临界高度和烟囱临界高度对山体高度、逆温层强度和地面水平风速的依赖关系。
At the same time, the dependence of the critical heights of pollutant and chimney on the height of hill, intensity of inversion and ground horizontal wind speed are shown.
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。
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.
利用GZ-1型热风干燥试验台对低浓度糖盐混合溶液渗后胡萝卜丝进行单困子试验，初步确定了物料干燥过程中的临界水分值，得出不同风温、风速下的薄层脱水模型。
In this paper, test and research on the air-drying performance for carrot slit after osmosis lower concentration solution (sugar+NaCl) were conducted on the air-drying trst desk (Model GZ-1).
研究表明火源条件设定对于数值模拟结果有显著影响，对于热释放率较小的火灾，采用单纯热源模型预测临界通风速度较安全。
The simulation results were compared with the previous study and the small-scale experiments. It shows that the choice of the fire source model has significant influence on simulation results.
研究表明火源条件设定对于数值模拟结果有显著影响，对于热释放率较小的火灾，采用单纯热源模型预测临界通风速度较安全。
The simulation results were compared with the previous study and the small-scale experiments. It shows that the choice of the fire source model has significant influence on simulation results.
应用推荐