查询词典 finite

In this dissertation the"Penalty"finite element method was employed to compute the velocity of the three-dimensional flow of power-law fluid in a profile die. In order to decrease the needed computer memory and raise the stability of numerical simulation, a set of decoupled methods such as PFEM, pseudo-body force method and transformation of momentum equation to the elliptic equation was developed to establish the general finite element equations to compute the distributions of velocity and viscoelastic stress of the three-dimensional viscoelastic flow of the Phan ThienTanner fluid in a profile die. During numerical simulation of the extrudate swell of the PTT fluid, the flow in the die and out of the die was analyzed separately, which demands less computer memory. The key techniques used in numerical simulation of the three-dimensional extrusion from dies such as decision of boundary conditions, creation of initial velocity field, selection of penalty factor, high Weissenberg number problem , regeneration of the free surface were studied in detail.

中文题名聚合物异型材口模挤出三维流动研究副题名外文题名 Study on three-dimensional flow of polymer melts during the process of profile extrusion from dies 论文作者涂志刚导师柳和生包忠诩教授学科专业材料加工工程研究领域\研究方向学位级别博士学位授予单位南昌大学学位授予日期2001 论文页码总数148页关键词挤出成型聚合物材料挤出口模聚合物异型材馆藏号BSLW /2003 /TQ320 /9 本文建立了求解挤出口模内幂律流体流动速度场的通用三维罚有限元模型；对于非线性粘弹性的Phan Thien-Tanner流体，为了降低模拟计算对计算机硬件的要求，并使模拟计算更加稳定，采用了一种去耦算法，包括罚有限元方法、拟体力方法和动量方程的椭圆类方程转化方法，并建立了求解速度场和粘弹性应力场的总体有限元方程；对于PTT流体的挤出胀大问题，提出了挤出胀大熔体口模内外分离模拟法，这样可以显著降低数值模拟对计算机硬件的要求。

In order to improve its performance, a finite element technology was employed for friction disk coupling heat stress. Based on the established physical model of heat conduction in engaging process of clutch , the finite elements were analyzed to acquire the temperature distribution and heat distribution of friction disk under thermal loads.

为了提高离合器的工作性能，采用有限元技术对离合器摩擦片进行了热应力耦合分析，基于所建立的离合器接合过程中的热传导物理模型，进行了有限元分析，并得到了热载荷下摩擦片的温度分布以及应力分布情况。

A mechanical model of buried pipeline with frusta is established under the research of being gulch. A finite cell model of buried pipeline is built by using ANSYS finite cell analysis program.

通过对有固定墩钢质管道在地质灾害冲沟发生时管道失效过程的研究，建立了描述这一破坏过程的力学模型；再利用ANSYS有限元分析软件，建立了埋地管道有限元数值分析模型。

The revolution bellows is idealized as a series of conical frusta, joined at nodal circles. The linear finite element analysis equation and the geometrical nonlinear finite element analysis equation in Total Lagrangian Formulation for the revolution bellows are derived using stationary total potential principle.

考虑到油罐刚度比波纹管刚度大的多，将油罐看作为刚体，将波纹管部分和管道部分分别用空间梁单元离散化，通过分析得到波纹管与油罐连接接合面、波纹管与管道连接接合面不同单元之间的位移协调约束方程，并用罚函数法进行处理。

The dynamical interaction between ground and structure of isolator table is analyzed by three-dimensional finite element method using"ANSYS"finite element software.

用ANSYS有限元软件对减震台进行了地基—结构动力相互作用的三维有限元分析。

In this research, a 3-D hexahedral finite element model of left foot including bones, cartilages, and soft tissues was developed. Besides, three finite element models of footwear including flat insole, total contact insole, and flat insole combined heel pad were also built, respectively.

本研究建构一组包含骨骼、关节软骨与完整软组织之左足三维六面体有限元素模型，并分别建构平板式鞋内垫、全触式鞋内垫与平板式鞋内垫加上足跟垫之简易鞋具三维六面体有限元素模型。

The nonlinear finite element models are also used to analyze the hysteresis behavior of the joints under reversed cyclic loads using ANSYS 8.0. The influences of the stiffener length and the infilled concrete are analyzed. Analytical results show that the stiffener length and the infilled concrete are critical for the joints. Furthermore, the skeleton curves of the finite element models are in good agreement with those of experiments.

运用ANSYS8.0对各节点试件在低周反复荷载作用下的滞回性能进行非线性模拟计算，分析内填混凝土、加劲肋长度等因素对节点受力性能的影响，结果表明：内填混凝土和加劲肋长度对节点受力性能的影响较大，有限元所得的骨架曲线与实测曲线吻合较好。

A detailed analysis on interference fit of hub was carried out by means of elastic mechanics and finite element method, in view of the above, the shortcomings of elastic mechanics method and the advantages of finite element method have been pointed out.

用弹性力学和有限元方法对轴毂过盈联接进行了详细的分析，据此指出了弹性力学方法的弊端和有限元方法的优势。

A three-dimensional finite element model corresponding to the animal model was established. The initial stress distribution was simulated by the Interference Fit Options in the finite element software.

另外，建立与动物实验相对应的有限元模型，利用有限元分析软件中的过盈配合方法计算骨-种植体界面的初始应力分布。

According to the standard and request of mechanical structures for electronic equipment tests, the finite element model of the electronic equipment cabinet was built by using the software of finite element analysis-ANSYS and simulated the tests of random vibrations by loading and calculating. The 3-D isopleths graph of deformation and stress of the cabinet was obtained. It could confirm the maximum of deformation and stress of the cabinet and probability of occurrence. Through more analysis of the frequency response curve reflected directly and clearly the deformation of the cabinet within the particular seismic frequency.

根据电子设备机械结构随机振动试验的标准和要求，采用有限元分析软件ANSYS建立电子设备机柜结构的有限元模型，通过加载求解对其进行随机振动试验的数值模拟，得到机柜有限元模型的三维变形和应力等值线图，进而确定机柜承受应力和变形的最大值及发生概率；通过对频率响应曲线的进一步分析，可以直观明了地反映出机柜承受一定频率范围地震下的变形情况。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。