数值分析

To numerically simulate the stress-strain response of the components under multiaxial cyclic load- ing,an elastoplastic finite element analysis was adopted to thin tubular specimens under multiaxial proportion- al and nonproportional tension/torsion loading at high temperature.

为数值模拟构件在多轴循环加载下的应力应变响应，利用ANSYS分析软件对承受高温2轴比例与非比例循环拉扭加载下的光滑薄壁管件进行了弹塑性有限元分析。

The working principle of the deployment control mechanism of appendages is investigated in detail, the feedback control model is established. And the effect of parameters to synchronized motion is discussed, in addition the nonsynchronous motion is investigated through the analysis of the principle for deployment control mechanism and driving mechanism and simulation.

针对在工程实际中发现的帆板展开运动不同步现象，本文详细分析了最常见的附件展开控制机构—CCL的工作机理，建立了CCL的反馈控制模型，并给出其具体的数学表达式，讨论了机构参数对帆板运动同步性的影响，进而通过对展开控制机构和展开驱动机构的机理分析和数值模拟讨论了帆板的不同步现象，并提出了减小不同步量的策略。

In this paper numerical simulation on the mechanical expanding process of line pipe is made by means of elastic-plastic FEM analysis software-MARC. The influence of sectorial angle on deformation characters is especially analyzed, and some useful results are gained.

本文运用大变形弹塑性有限元分析软件MARC，对管线钢管机械扩径过程进行了数值模拟，著重分析了扩径模具的扇形角对扩径过程的影响，得到了一些有益的结论。

A method is presented for determining the optical thickness and effective particle radius of stratiform cloud layers from transmitted solar radiation measurements.

通过原理分析和详细的数值模拟对该方法的可行性进行了讨论，并给出了反演流程，进行了误差分析。

In this paper, we contribute an evolutionary heterogeneous beliefs model byusing t distribution to replace traditional standard normal to describe fundamen-tal price process and adding risk-adjusted market fraction function in classicaltwo types traders scheme. And then we utilizedifference equation stability and bifurcation theory and numerical simulation tostudy the system. It is found that the system has some styled facts (high kurto-sis、fat tali and long memory) of the actual financial market, and this indicatesthat the simulation model can reflect well the true financial market.

本文通过引入t分布代替原有的正态分布描述基础价格过程，引入经风险调整的投资者市场分数维函数取代原有的无风险调整的市场分数维函数，在经典的两类投资者(自主投资者和图表分析者)模拟模型框架下，建立了新的异质预期资产定价模型，利用差分方程稳定性和分支理论及数值模拟的方法对该系统进行理论分析和实证研究，发现模型具有真实金融市场的程式化事实(尖峰厚尾性，长记忆性等)，模拟效果较好。

In this paper, material properties of the segment of the porous metal-bonded diamond grinding wheel were researched by finite element simulation. Segments were manufactured according to the design result and their elastic modulus was measured. The key points are as follows: The influence of the porosity on the elastic modulus was analyzed through a finite element method. In the FEM model, the design variable only includes the porosity, and the tetrakaidecahedron model is applied as the microstructure model of porous metal matrix. The corresponding porosity was decided in order to meet the requirement of the elastic modulus.

本文利用有限元软件对多孔金属结合剂金刚石砂轮节块的材料性能进行了数值模拟计算，依设计结果制备了节块试样，并测试了节块的弹性模量，主要内容有： 1、充分借鉴多孔材料结构设计和分析的方法，以十四面体模型为多孔金属胎体的微观结构模型，以孔隙率为设计变量，通过有限元分析，计算出满足一定弹性模量要求的多孔金属胎体的孔隙率范围。

To assess the invasion risk of alien marine species, an invasive risk assessment system was constructed based on the characters of introduced marine species and on the analysis of literatures and expert consultancy. The system has 5 primary and 20 secondary indexes, and was constructed using analytic hierarchy process method and trigonometrical fuzzy numbers for determining the weight of each index of the system.

中文摘要：为了评估外来海洋物种入侵的风险，根据外来海洋物种入侵特点，在文献分析和专家咨询的基础上，采用层次分析和三角模糊数数值标度计算权重的方法，设计5个一级指标和20个二级指标，构建了外来海洋物种入侵风险评估体系。

In this dissertation, the main factors that influence the impact point displacement on the earth surface is also analyzed in detail, and six-degree-of-freedom trajectory simulation is presented based on the unsimplified dynamical equations.

将各因素对姿态响应的影响进行数值仿真，通过分析仿真结果，对姿态动力学模型进行了简化分析，使得简化的动力学模型既保持了原系统的主要特性，又便于今后对控制系统的设计。

The Duncan E-v model was adopted to analyses unstrengthened dam's stress and strain in different case and estimate dam's stabilization. Reference to result of analysis, this paper put forward potentially important strengthened region.

采用邓肯张模型对未加固前小峰水库均质坝进行应力应变分析，计算小峰水库在不同工况下，其坝体的稳定情况，并依据数值所分析的结果，指出其坝体应着重加固的区域。

This paper has mainly analysedvertical oblique flow circulating pump operation properties. Through monistic flowdesign theory, carried out preliminarily design for impeller, and completedthree-dimensional model analysis through CAD software. With the aid of CFD-FLUENTsoftware platform, have carried out value for flowing imitation in pump, the SIMPLECmethod on unstructural grid has realized pressure the couple of speed, which verified theresult of preliminary design.

本文主要分析了立式斜流循环水泵运行特性，通过一元流设计理论，对叶轮进行初步设计，并通过 CAD 软件进行立体三维模型分析，借助 CFD-FLUENT 软件平台，对水泵内流场进行了数值模拟，利用非结构网格上的 SIMPLEC 方法实现压力-速度的耦合，对初步设计进行计算结果的验证。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。