查询词典 penstock

The problem in the stability of the penstock under external pressure can be solved in real-time. Computing the element stiffness matrix is the key of real-time computation.

压力钢管外压稳定问题可以采用实时求解方法，实时求解的关键在于单元刚度矩阵的计算。

Based on Three Gorges Project, the following aspects about the three typical embedding manners are studied:(1) The border condition of cyclic symmetry is applied to the finite element models with contact among cushion layer, penstock and concrete. The effects of elastic modulus, thickness and placement extent of cushion layer on the stress of its around concrete are analyzed. It is suggested that the ratio of thickness to elastic modulus can be used as an important parameter in the design of cushion layer.

因此，本文结合三峡工程建设实践，在收集和总结前人经验的基础上，以大型通用有限元分析软件ANSYS为平台，对不同埋设方式的巨型蜗壳结构进行以下几个方面的研究：(1)引入循环对称边界条件，考虑垫层-钢板-混凝土之间的接触摩擦，建立有限元模型；并对垫层敷设范围、垫层厚度和弹性模量等设计关键参数进行了优化，并把"垫层弹性模量与垫层厚度之比"作为参考指标进行设计。

This paper analyses the distributive law of axial compression in concrete wall and its influnce on strength of reinforced concrete penstock with steel lining located on the downstream surface of a concrete dam by the finite element method and model tests with material similar to prototype.

通过几个电站的有限元计算和仿真材料模型试验成果，分析混凝土坝下游面钢衬钢筋混凝土管道的轴向应力分布规律及其对管壁应力的影响，可作为管壁三维强度分析的依据，并指出在轴向压力和内水压力作用时裂缝更早发生。

Such as audio panels, knobs, phone panels, battery lid, mp3 keys, cell phone navigation button, the lights, cosmetics lid, optical lenses , electroforming signs, Penstock, remote control car keys, reflective panels, lightguide plate, electroform nickel, and other signs.

如音响面板、旋钮、手机面板、电池盒盖、mp3按键、手机导航键、车灯、化妆品盒盖、光学镜片、电铸标牌、笔杆、汽车遥控按键，反光板，导光板，电铸镍标牌等。

According to the principle of ring-like strands operation, the mechanical analytic solution of presressed concrete penstock under the uni-ring-like radial loads is given out based on the theories of elastic footing beam.

根据环形预应力作用机理，结合弹性地基梁理论，提出了单环预应力作用效应的计算方法和预应力混凝土压力管道施工阶段的验算方法。

Computation result shows that the thermal load is the most important factor to the stress of the penstock.

2温度应力计算结果表明，温度荷载对管道应力的影响非常显著。

This paper presents a π equivalent circuit model of penstock in hydro-plant based on the transient flow function of penstock.

0引言我国水电站的发展相当迅速，在这些水电站中有相当一部分是引水式电站。

The negative pressure is a result of a penstock valve closure and only occurs in a small section of the penstock immediately downstream of the valve.

负压力的产生是由于水道阀关闭的结果，并且只发生在位于阀下游的一小部分水道中。

The residual stress in the penstock of hydropower station produced by the welding is one of important factors which cause the brittle fracture of penstock.

水电站引水压力钢管焊接后产生的残余应力，是引起钢管脆性断裂的重要原因之一。

According to the design criteria of reinforced concrete penstocks, combined bearing ability of bifurcated steel penstock and anchor concrete block should be considered to reduce the thickness of steel penstock.

建议考虑镇墩混凝土与钢岔管联合承载，按钢衬钢筋混凝土管道的设计方法进行设计，以达到减小钢岔管管壁厚度、简化施工工艺和节约工程投资的目的。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。