弹性

Fir Fortunately Seiki leading products: 1, bulging packages (also known as the swelling sets, key-free bearings, bushings-free bond, the bond-free coupling, internal and external expansion sets) 2, coupling mainly patch-coupling, precision servo motor couplings, air compressor for flexible coupling, no backlash precision flexible coupling, the universal joint, the plum blossom - Shaft, etc.

杉幸精机主导产品：1、胀套(又称胀紧套，免键轴承，免键衬套，免键式联轴器，内外膨胀套)；2、联轴器(主要有膜片联轴器，精密伺服电机联轴器，空压机专用高弹性联轴器，无背隙精密弹性联轴器，万向联轴器，梅花型联轴器等)；3、扭力限制器(按照国际标准，可完全替代日本，台湾，欧美进口产品)。

Plunger core of this pump is made of metal tube with several radial holes in the middle. There is an elastic expansion sleeve on the middle screen plunger core; several wear resistance seal rings are on the expansion sleeve.

该泵的柱塞芯由中部开有若干个径向槽孔的金属管制成，柱塞上装有一个弹性伸缩套，套在中心筛管柱塞芯上，在弹性伸缩套外面套有若干个耐磨的密封环。

Flex family of three pillows: Soft Pillow, fiber cotton pillows, silk, feather pillow filling and other basic material, comfortable and flexible Product; hard Pillow, the people gradually, and enjoy popular buckwheat shell filled material, mobility, and be free to shape the shape, in particular the best load bearing capacity to have a growing number of loyal followers; neutral pillow (Mid-Firm Pillow), natural Typha velvet, slightly elastic material, such as Kapok Morrison, but the natural aroma, comfortable and soft, and the support of the cervical spine in particular, see favorite moderate.

软硬度三大枕头家族：软枕，纤维棉枕、蚕丝、羽绒枕等基本填材，产品舒适而富有弹性；硬枕，国人逐步喜欢并流行的荞麦壳填材，流动性好，可自由塑造形状，尤其承托力最佳让其拥有了越来越多的忠实追随者；中性枕（Mid-Firm Pillow），天然香蒲绒，木棉花等材质弹性略逊，但天然芳香、舒适柔软，对颈椎的承托适中尤其惹人喜爱。

The results show that the flap hinge spring rate has a great effect on helicopter stability and control, but precone and prelag angle,lag hinge spring rate and blade lag motion can be negligible...

分析结果表明：旋翼的预锥角和预掠角对直升机全机的稳定性和操纵性的影响可以略去不计，而桨叶根部挥舞方向上的弹性约束刚度对直升机全机的操纵稳定性有较大影响，摆振方向上的弹性约束刚度和桨叶的摆振运动对直升机稳定性的影响不大，可以略去不计。

Two kinds of cantilever beams used in the MEMS devices are designed as the fixed-fixed and crag-leg flexures, and the spring constants are derived respectively using energy methods of elastic mechanics.

设计了在MEMS器件中最经常用到的两种悬臂梁结构，即直角型和蟹脚型，通过利用弹性力学的能量分析法分别得到各自的弹性常数。

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.

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 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 solve these problems, we propose a novel scheme: by getting ring structure and star structure together, we get a bidirectional four-ring structure, in which the outer two rings form a standard RPR, and the inner two rings form a star structure logically.

为了解决弹性分组环局限性问题，提出了弹性分组星-环结构：即将环形结构和星形结构结合起来，组成一个四环结构，使外二环在物理上是环形结构，内二环在逻辑上是星型结构。

The solution to elastic foundation and the answers in this paper puts forward the study to elastic foundation theory, and they have important guide meanings to the designs and constructions etc. of plates on freeway、 airport aircraft parking area、 wharf freight shed、 slab—foundations.

本文所述的弹性地基的求解方法及其结果，充实了弹性地基理论的研究，对高速公路路面板、机场停机坪、码头货舱、板式地基的设计和施工等工程实践具有重要的指导意义。

TRZ series elastic sealing gas valve TRZ series elastic sealing gas valve is different from a gas valve plate special valve.

TRZ系列弹性密封燃气闸阀 TRZ系列弹性密封燃气闸阀是区别于平板闸阀的一种燃气专用阀门。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。