查询词典 shutter dam

In the practical examples we optimized a simple double-curved arch dam with a single circle centerand equal thickness,and a complicated logarithmic spiral double-curved arch dam according to this designnotion,calculation results of the practical examples show that the design method is audio-visual and rational.

在实例中按照这种设计思路，对体形较简单的单圆心等厚度双曲拱坝和较复杂的对数螺旋线双曲拱坝分别进行了优化设计，计算结果表明该优化设计方法直观、合理。

It further demonstrates that applying the two-dimensional shallow water equation with the present high-resolution scheme can effectively simulate the propagation of dam-break bores, which may provide a scientific approach for the lucubration of other dam-break flow characteristics and the decision-making of the prevention of disasters.

应用二维浅水方程和本文的高分辨率数值方法能有效地模拟溃坝波的演进过程。

Based on the conception of the equivalent stress,the expressions of the equivalent stress was educed. In this optimal design, the macro file for calculating the equivalent stress of arch dam is complied by using the parameter design language of the software, and the optimal design for shape of arch dam using equivalent stress as stress restraint condition is carried out.

本文基于等效应力概念，推导了拱坝有限元等效应力计算公式，将有限元法求得的坝体与基岩交接面上的应力合成截面内力，然后求出对应的线性化应力，并以此应力作为应力约束条件，实现了以等效应力作为应力约束条件进行拱坝体形优化。

The statigraphic sequence of the dam foundation is Guanwushan group belonging to the mid series of Devonian system D_(2gn. The stratigraphy of dam foundation is mainly comprised of limestone, dolomite with marlite.

其坝基岩层主要为泥盆系中统白云石铺群观雾山组D_(2gnD_2~1～D_2~9层，岩性主要为灰岩、白云岩及少量泥质灰岩和微层泥灰岩。

The influence of the interaction on the mode shapes of the dam is also analyzed. Based on the above analyses, two modified models, which are massless damping foundation and part of mass foundation, are presented to simulate the dam--foundation interaction mechanism. A new method to form the non-proportional damping matrix is proposed.

在此基础上，为了更好地模拟坝—地基相互作用的机制，提出了两种改进的地基计算模型：无质量有阻尼地基模型和部分有质量地基模型，建立了形成体系非比例阻尼矩阵的方法，并用来分析了相互作用对重力坝的地震反应的影响。

From the point of practice, the massless foundation model is applied for problem of the dam--foundation interaction. The regularity of the natural frequencies of the dam varying with the boundary size of the foundation is studied under various foundation conditions, and then the rational foundation size is decided.

从实用的角度出发，利用无质量弹性地基模型分析坝—地基相互作用问题，研究了不同地基情况下重力坝自振频率随地基边界范围变化的规律，确定了合理的地基边界范围，并分析了相互作用对坝体振型的影响。

Based on the marriage of finite elements method and multi-arch beam method, improving equivalent stress analysis method of arch dam is proposed and the effect of mesh size on arch dam equivalent stress is discussed in this paper.

在综合有限元和多拱梁法优点的基础上，提出了一种改进的拱坝等效应力分析方法，并通过算例探讨了网格尺寸对拱坝等效应力的影响。

The Three Gorges Dam will be the largest hydropower station and dam in the world, with a1.2 mile stretch of concrete and a370 mile-long reservoir and525 feet deep.

工程完成后，三峡将成为世界上最大的水力发电站，拥有1.2英里长的混凝土纵向围堰、70英里长、25英尺深的水库。

Second, pay close attention to water conservancy facilities, in fully grasping Shihfang nullah at the same time, a number of new water conservancy projects, after electricity dam irrigation, drainage and dam heights village branch lined on three sides, and strive each year for 600 acres of irrigated area.

其次是狠抓水利设施，在全力抓石坊大渠同时，新上一批水利工程，后坝电灌、高峰村水渠和河坝支渠三面衬砌，力争每年新争灌溉面积600亩。

Li on, Portugal, 22 Nov – Pardoning the debt of the Cahora Ba a Hydroelectric Dam by Portugal, via the tra fer agreement of the dam to Mozambique, will cost USD 1.94 billion and this will be a orbed by the Portuguese public deficit within 13 years, says a report from Portuguese busine daily Jornal de Negócios.

葡萄牙，里斯本，11月22日－葡萄牙商务日报的一篇报道称，通过向莫桑比克转让股权来豁免卡布拉？巴萨水电站的债务将损失葡萄牙19.4亿美元。这些损失将分担到葡萄牙13年的财政赤字中。

I can do simple painting, carpentry and plumbing.

我能做简单的油漆、木工和修水管等工作。

The motivations, notations and outline of this work are also given in this chapter.

从这个意义上讲，这些时滞是无害的。然后用实例说明这三个定理的应用和互不包含性。