查询词典 main beam

At present, the difficulty of the project's largest steel structure in the main truss beam successfully uninstalled.

目前，这一工程中难度最大的钢结构主桁架梁成功卸载。

Thesis is divided into five parts, the main contents include: a long beam and truss repair and strength calculation, Liang Lu-board repair, the following box and wing rib repair, box rib injury at the time of small-scale repairs, large-scale box rib injury at the time of repair and a new frame, the positioning rib installation.

论文共分5个部分，主要内容包括：梁和长桁的修理及强度的计算、梁履板的修理、隔框和翼肋的修理、框肋小范围损伤时的修理、框肋大范围损伤时的修理及新框、肋的定位安装等。

The main body can be stationary mounted, it can be hung with the aid of trolley on an l-steel track for straight and curved reciprocation, it can also be fixed on various cranes, such as single-beam bridge cranes, hanging cranes, arm cranes and gantry cranes, makes the operating range extended and the occasion increased.

其主体可固定安装或通过小车悬挂在工字钢轨道上作直线或曲线的运行，还能配用在单梁起重机、龙门起重机、悬挂起重机、悬臂起重机等多种起重机上，使作业面积扩大，使用场合增多。

Based on the principle of Hamilton, dividing the main blade, flexbeam and torque tube into several beam elements, the bearingless rotor is nonlinearly modeled in this paper through modal transformation. By Newton-Raphson iteration and temporal finite element method, the above nonlinear equations are solved.

将无轴承旋翼的主桨叶、柔性梁和套管3个部分各自离散成若干梁单元，并将桨叶运动的物理坐标转换为挥舞、摆振、扭转方向的模态坐标，根据Hamilton原理建立旋翼气弹分析的动力学模型。

On the basis of the former researches and taking into account the practice of our country, this paper take the low period repeat loading experiment for three rigid conjunction node of steel beam and concrete wall, researching their load-bearing capacity and earthquake resistance performance under the low period repeat loading action, the main content concentrate on the following aspects:(1) Analyzing the three joint's damage shape、hysteretic curve、change of rigidity、yielding load、limit load、damage load、durability、energy dissipation capacity、the strain of the key position and the moment transferring mechanism.(2) Comparing the joint's load-bearing capacity and earthquake resistance performance among the joints with different stud bolt diameter and different connection plate thickness, researching some factor's influence on the work performance of the joint such as the high and strong stud bolt specification、connection plate thickness .

本文在前人研究的基础上，结合我国的实际情况，对3个钢梁-混凝土墙刚接节点试件进行了低周反复荷载试验，对其在低周反复荷载作用下的承载力和抗震性能进行了研究，内容主要集中在以下几个方面：(1)对3个节点试件在低周反复荷载作用下的破坏形态、滞回曲线特性、刚度变化、屈服荷载、极限荷载、破坏荷载、延性性能、耗能能力、关键部位的应变分布情况及节点核心区的受力情况进行了试验研究和理论分析；(2)比较了不同螺栓规格和不同连接板厚度的节点试件的承载力和抗震性能，研究了高强螺栓规格和连接板厚度这2个因素对节点工作性能的影响；(3)介绍了光纤光栅传感技术在土木工程领域中的应用研究现状及其基本原理；并通过对比试验，探讨了光纤光栅传感器用于土木工程检测的可行性及实现途径。

The distributions of stresses and strains on the section of strengthened beam are analyzed. The different formulas for the calculation of internal forces of section are deduced according to the different development stages of strain and a flow diagram for the calculation is established. With the program based on the diagram, the internal forces and some relevant parameters of the strengthened beams are calculated and the main factors which affect the ultimate bearing capacity of the beams are discussed.

分析中，着重研究了加固梁的截面应力、应变分布特点及可能出现的变化情况，给出了截面应力合力的计算公式并给出了计算框图，依据框图编程对影响加固梁正截面承载力的相关变化参量进行了计算分析并对影响极限承载力的主要因素进行了分析讨论。

The main products are: WDB300t/h-600t/h type stability Soil Mixing Plant, SPXJ30t/h.50t/h type lime digestion broken machine, HZS, HLS series of concrete mixing plant, PLD series concrete batching machine, JS Series concrete mixer, non-contact, TJP-16M-type asphalt-contact balance beam irrigation, SS1232-type stone spreading machine, LRS6T / H-type cationic emulsified asphalt production equipment, and in accordance with customer's need to continuously introduce new products to meet customer needs.

主要产品有：WDB300t/h-600t/h型稳定土厂拌设备、SPXJ30t/h.50t/h型石灰破碎消解机、HZS、HLS系列混凝土搅拌站，PLD系列混凝土配料机、 JS系列混凝土搅拌机、非接触式、TJP-16M型接触式平衡梁沥青灌、SS1232型石屑撒布机、LRS6T/H型阳离子乳化沥清生产设备，并根据客户的需要不断推出新产品，最大限度地满足客户的需求。

It is important to reduce the span of the hard roof to avoid its impact load on supports. However, at longwall top coal caving face, the periodical weight of roof is a main factor that crushes the top coal, which is beneficial to the top coal recovery. How to use the roof pressure safely is of crucial importance in top coal caving. Based on field monitoring, theoretical analysis of strata movement, the numerical model of compound structure of hard roof stepped cantilever and the top coal cantilever beam is built, and the parameters of the model are also determined. The elasto-plastic finite element method is used to analyze the effect of hard coal fracture under the abutment pressure of hard roof, and the cracking coefficient is defined according to the stress state of the element.

通过对岩层移动的现场观测，建立了&两硬&条件综放采场台阶悬臂—悬臂梁组合的煤岩组合结构力学模型，并以此煤岩结构为基础，建立&两硬&条件综放采场顶煤压裂的有限元数值模型，分析了坚硬顶板不同来压步距对坚硬顶煤的压裂效应，并确定了合理的支架阻力，从而对坚硬顶板进行有效的控制，消除坚硬项板对采场的冲击隐患，同时保证采场矿压对坚硬顶煤的有效压裂，达到提高顶煤回收率之目的，由此形成了坚硬顶煤、坚硬顶板条件下综放采场围岩控制的基本理论和方法。

In the main peak,"Snow Bonding" side by side next to a 3 at about 5,000 meters above sea level in the mountains of their link line, with the Huanglong Mountain, snow-capped mountains southeast of Songpan composition of the beam barriers, cross the area of 160 square kilometers.

在主峰&雪宝鼎&的身旁并列着3座海拔5000米左右的大山它们连结成一线，同黄龙山、雪山梁组成松潘东南之屏障，所跨面积达160平方公里。

The main body of this statue is two metallurgical construction people who are holding up the sun hand in hand, which symbolizes the hard workings done by the generations of MCC20 people in the 30-year history river who propped up the ridge beam of steel as well as the sun that symbolizes the metallurgical construction cause.

钢雕主体两个冶建人，携手托起太阳，象征着在30多年的历史长河中，几代冶建人艰辛创业，撑起了中国钢铁的脊梁，托起了冶建事业的太阳。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐