查询词典 structural engineering

For professionals in mechanical engineering, civil engineering, aeronautical engineering, and engineering mechanics careers.

面向在机械工程，土木工程，航空的工程和工程力学职业方面的专业人士。

For professionals in mechanical engineering, civil engineering, aeronautical engineering, and engineering mechanics careers.

面向在机械工程，土木工程，航空的工程和工程力学头班方面的专业人士。

Fuel assemblies of fast breeder reactor core submerged in the liquid sodium may vibrate under the earthquake, which possibly leads to structural damage of fuel assembly or structural deformation of the core and affects structural integrity and safety qualification of the core.

浸没在液态钠中的快堆堆芯组件在地震作用下发生振动，可能导致组件结构损坏或堆芯结构变形，从而影响反应堆结构完整性和安全。

PSO is a population-based optimization algorithm, which mimics the social behavior of animals in a flock. It makes use of individual and group memory to update each particle position allowing global and local search optimization. The objective function considered was the total weight of the structure subjected to stresses, displacements and forces constraints. The effects of the parameters were investigated as well and such combination of tuning parameters promote a better global search behavior avoiding premature convergence while rapidly converging to the optimal solution. Results showed the effectiveness of the proposed method by comparing with ANSYS Design Optimization Tool (zero-order method). The PSO with the tuning parameters makes it an ideal method for offshore wind turbines foundations optimization tasks.(2) A reliability analysis method for pile foundation bearing axial loads based PSOThe performance function of pile foundation's axially bearing capacity sometimes is nonlinear and complex, on the basis of geometric meaning of structural reliability index, an optimum model with PSO for structural reliability analysis under arbitrary random variables was established, The PSO algorithm is very efficient to solve global optimization problemsIts use in structural reliability field presents not only the advantage of its facility of implementation, but also the possibility to obtain the design point and the failure probability with a good accuracy. In addition, PSO is a zero order algorithm, for no derivative is necessary for its implementation.

本文的研究针对桩式海上风机基础结构的特点，在国内外有关研究成果的基础上对海上风机基础结构优化设计理论和可靠度方法一些相关问题进行了较为深入的研究，具体做了以下几个方面的工作：(1)基于粒子群优化的桩式海上风机基础确定性优化设计方法桩式海上风机基础的优化设计是一个复杂的、非线性约束的优化问题，针对传统的基于梯度信息的优化方法在处理非线性问题中易陷入局部最优解的问题，本文将一种耦合惩罚函数的PSO算法引入到海上风机基础结构概念设计中，PSO算法是从群体动物聚集觅食这一活动中受到启发而发展的，该算法利用个体和群体的信息共享不断改进自身的位置从而进行局部和全局最优搜索，本文中以桩和三脚架连接段直径及壁厚为设计变量，以基础总重量作为优化的目标函数，在给定的约束条件下建立了三脚架基础优化数学模型，另外本文还研究了PSO参数变化对结果的影响，协调的参数组合可以避免陷入早熟收敛而能够快速的获得全局的最优解，通过与ANSYS优化模块的计算结果比较验证了该方法的有效性，本方法为海上风机基础的确定性设计提供了一条有效的途径。

Regular icosahedron ; regular dodecahedron ; quasicrystal ; conjugate fractal structural model ; conjugate fractal structural model of quasicrystal ; Penrose pattern ; high resolution structural image by electron microscopy.

正十二面体；正二十面体；准晶体；共轭分数维模型；准晶共轭结构模型； Penrose拼图；高分辨电子显微结构图

The first part includes two chapters, discussing the engenderment and formation of the conception of Ligeti's structural thinking from a macro perspective, emphasizing the influences from history, culture and the whole musical context in the 20th century. The second part includes four chapters, discussing the techniques used in Ligeti's works from a micro perspective. The third, fourth and fifth chapters emphasize "structural processes", while the sixth chapter analyzes "structural shape".

上篇包括两章，主要对利盖蒂的结构思维观念从产生到形成进行宏观论述，着重探讨了20世纪的历史、文化、音乐创作大背景对利盖蒂结构思维发展的影响：下篇包括四章，主要对利盖蒂的结构思维表现手法进行微观分析，第三、四、五章从"技法形态"对其作品进行分析，第六章从"布局形态"对其作品进行分析，这一部分比第一部分偏重，也是本文的重点。

In addition, attention to energy efficiency, environmental protection section of the building structural system extension, research and development, extension of the framework Kuangjian structural system, steel structural system, the CL system, heteromorphosis pillar framework GRG gypsum big board system.

此外，重视节能、环保型的建筑节结构体系的推广，研发、推广了框架框剪结构体系、钢结构体系、CL体系、异型柱框架GRG石膏大板体系等。

Firstly, the study of the mechanical model. The three-dimensional finite element model is established, and it is condensed into M-dof interlamination structural model. The structural dynamic analysis is implemented by use of three-dimensional finite element model and M-dof interlamination structural model.

本文通过严谨的数学推导，得出"力学不耦合"的超高层结构顺风向和尾流旋涡干扰引起的横风向振动随机响应公式，并编制了相关计算程序，深入研究了应用随机振动理论进行结构风振反应分析的方法。

Considering the randomness of the structural physical parameters and utilizing the random variable's functional moment method and the algebra synthesis method, the mean value and the variance of the mean square value of the structural displacement response under stationary random excitation are computed firstly from the expressions of structural stationary response in frequency domain. And then the expressions of the mean value and the variance of stochastic rigid frames dynamic reliability are educed from the Poisson formula of calculating dynamic reliability.

考虑结构的物理参数具有随机性，从结构随机响应的频域表达式出发，利用求解随机变量数字特征的代数综合法和矩法，导出随机参数刚架结构在平稳随机激励下的位移及速度响应均方值的数字特征，再由动力可靠性的Poisson公式导出结构动力可靠度的计算公式。

In chapter seven, structural analysis for hydraulic press products is made and the concept of structural analysis based on parameterized FEM modeling is presented. On the basis of APDL parametric programming language in ANSYS, methods of structural analysis for press machine is made formalized, standardized, and parameterized.

第七章研究液压机产品结构分析的主要内容，提出了基于参数化有限元模型的结构分析模板的概念，并以ANSYS参数化编程语言APDL为基础，实现液压机产品结构分析的程序化、标准化、参数化。

The production moved off-Broadway to New York City, where she won the Joseph E. Calloway award for her performance, and was profiled in American Theater Magazine as one of ten young theater artists to watch.

生产提出过百老汇的新的纽约市，在那里她赢得了约瑟夫calloway奖，她的表现，并于异型在美国的战区杂志之一， 10战区的青年艺术家观赏。

It's a risk tradeoff, and I believe that adding test support code usually wins.

这是一个风险的权衡，我相信添加测试代码通常会占上风。