Allowable Height Difference between Adjacent Monoliths with Spherical Surface Key Groove in Transverse Joints

2013 ◽  
Vol 438-439 ◽  
pp. 624-628
Author(s):  
Dan Ni Luo ◽  
Yu Hu ◽  
Qin Bing Li
Keyword(s):  
Analytical Model ◽  
Calculation Method ◽  
Spherical Surface ◽  
Arch Dam ◽  
Volume Deformation ◽  
Height Difference ◽  
Computation Theory ◽  
Main Factors ◽  
Vertical Deformations

The calculation method of the minimum aperture of transverse joints with spherical surface key groove was introduced in this study. Based on the computation theory of allowable height difference between adjacent monoliths proposed by Bofang Zhu, the analytical model of allowable height difference of Xiluodu arch dam was established with consideration of the effect of main factors on the transverse joints deformation, including the temperature, autogenous volume deformation, self-weight and foundation. After the horizontal and vertical deformations of transverse joints was required, according to the form of spherical surface key groove, the aperture of each part of key groove and the minimum aperture were obtained at several height difference between adjacent monoliths. The allowable height difference was determined on the condition of meeting the grouting requirements of transverse joints. The result shows that the allowable height difference for Xiluodu arch dam should not be more than 30m.

The Analysis about Increasing Competitive Ability to Accepting Orders of Garment Enterprise

2012 ◽  
Vol 433-440 ◽  
pp. 1879-1883
Author(s):  
Yu Ying Qiu
Keyword(s):  
Calculation Method ◽  
Competitive Ability ◽  
Working Ability ◽  
Main Factors

Main factors of affecting the ability to accept orders of garment enterprises ate working ability and competitive capacity. This paper mainly discusses three ability parameters of assemble line, and makes assessment for the working ability of the order. Simultaneously, it investigates the price composition of processing expense, and puts forward sample and practicable calculation method, which evaluates the competitive ability of enterprise. The conclusions and ways posed in this paper have practical value for trading.

Research on the Calculation Method of Tightening Torque on P-110S Threaded Connections

2011 ◽  
Vol 133 (5) ◽  
Author(s):  
Shou-Jun Chen ◽  
Qi An ◽  
Yi Zhang ◽  
Qiang Li
Keyword(s):  
Analytical Model ◽  
Calculation Method ◽  
Geometric Parameters ◽  
New Method ◽  
Frictional Torque ◽  
Element Analysis ◽  
Tightening Torque ◽  
Threaded Connection ◽  
Threaded Connections ◽  
Elastic Mechanics

Tightening torque is one of the main factors that could affect the connection quality in threaded connections. On the basis of elastic mechanics and thick cylinder theory, this paper established a new analytical model based on the geometric parameters of thread tooth and the calculation method of tightening torque on P-110S threaded connections was also obtained by calculating the frictional torque on each threaded surface. In this paper, the friction coefficient on the real contact thread tooth was measured by the developed experimental equipment that could be used to simulate the contact of threaded surfaces approximately. By applying the new method on P-110S threaded connection and comparing the results obtained by analytical model with the true make-up torque in application, it could be found that the analytical model and the calculation method proposed in this paper are reasonable. The new method was also validated by using the finite element analysis method to the same sample. The new method proposed in this paper is practical and convenient because it can be applied to calculate the tightening torque just with geometric parameters and thread numbers, which is easier to implement in application.

Appliance of 3-D Composite Layered Element in RCC Dam

2011 ◽  
Vol 243-249 ◽  
pp. 4619-4622
Author(s):  
Rui Gao
Keyword(s):  
Numerical Calculation ◽  
Calculation Method ◽  
3D Model ◽  
Transversely Isotropic ◽  
Arch Dam ◽  
Rcc Dam ◽  
South West ◽  
New Type ◽  
Numerical Calculation Method

A numerical calculation method and a new type element of EFM for the simulation of the RCC dams is presented. It takes into account the more relevant features of RCC, such as the transversely isotropic, the layered character, the strength unequal to tension and compress and the discontinuities. A 3D model of RCC Dam, built in South-West of China, is used to perform the corresponding analyses. The result shows the location of third height to dam heel in upstream dam will be crack between layers. So it is very dangerous for arch dam. In the the locations of third height to dam toe and dam crest of the downstream of the dam will occur the stresses concentration, so some of engineer measures must be adopted to avoid the damage.

scholarly journals CALCULATION OF TAKEOFF AND LANDING PERFORMANCE UNDER DIFFERENT ENVIRONMENTS

2016 ◽  
Vol 42 ◽  
pp. 1660174 ◽  
Author(s):  
YAJUAN ZHU ◽  
JIANGFENG WANG ◽  
YONGLIANG CHEN ◽  
YIZHAO WU
Keyword(s):  
Wind Speed ◽  
Detailed Analysis ◽  
Calculation Method ◽  
Aircraft Design ◽  
Current Approach ◽  
Theoretical Derivation ◽  
Integration Algorithm ◽  
Factors Affecting ◽  
Main Factors ◽  
Engine Failure

The takeoff and the landing of an aircraft are the most dangerous phases of flight, so the study of takeoff performance and landing performance is of great importance for aircraft design and safety. In the paper, a high-precision numerical integration algorithm for evaluating takeoff and landing performance is developed, which establishes and solves the equations of dynamics during takeoff and landing process. The proposed method is capable of calculating takeoff and landing performance under different environments. To verify the current approach, all-engine operating takeoff distance, one engine failure takeoff distance, takeoff stop distance and landing distance of a certain type of plane with four engines are analyzed. It shows that the developed calculation method is reliable and effective. Based on this algorithm, a detailed analysis of the main factors affecting the takeoff and landing performance is given. The influences of altitude, temperature, takeoff and landing weight and wind speed are analyzed. Through theoretical derivation and examples verification, the proposed method will be reference for the study of takeoff and landing performance.

scholarly journals Comparison of Profile Matching Method with SMART Method for Laboratory Assistant Selection

2020 ◽  
Vol 4 (2) ◽  
pp. 311-318
Author(s):  
Sri Rahayu Astari ◽  
Rusydi Umar ◽  
Sunardi
Keyword(s):  
Decision Making ◽  
Calculation Method ◽  
Calculation Methods ◽  
Matching Method ◽  
Profile Matching ◽  
Laboratory Assistant ◽  
Long Time ◽  
Main Factors ◽  
Level Of Importance

Laboratory assistant in university are the main factors in determining the course of practical in the laboratory. So it needs to be selected to get an assistant with good competence. Assistant selection is done by assessing four aspects namely administration, competence, microteaching, and interview. So far the assessment is still done manually, the criteria value still has the same importance. The calculation method which is also not optimal has an impact on the results and the long time of decision making. So we need a method to overcome these problems. In this study the calculation methods used are Profile Matching and SMART (Simple Multi Attribute Rating Technique). Based on research conducted both methods work by grouping criteria according to their level of importance. There are 12 criteria divided into four aspects, and alternative data of 7 participants were taken from 2019 participant data. The results of the two methods are ranking sequences compared with ranking results in 2019 selection. The results of this study show better profile matching because it has an accuracy value 100% is exactly the same as the results of the previous selection, while SMART is only 42.8%.  

Simulation on Bond Behavior of RC Beams Strengthened with FRP

2012 ◽  
Vol 193-194 ◽  
pp. 1148-1151 ◽  
Author(s):  
Xin Yan Lin ◽  
Hai Ping Meng
Keyword(s):  
Theoretical Calculation ◽  
Analytical Model ◽  
Calculation Method ◽  
Experimental Result ◽  
Rc Beams ◽  
Test Results ◽  
Bond Behavior ◽  
Key Factor ◽  
Concrete Interface ◽  
Key Parameter

The bond behavior on the FRP-concrete interface is a key factor to affect the behavior of members strengthened with FRP. In this paper, an analytical model to simulate the bond behavior on FRP-concrete interface between two adjacent cracks is derived; furthermore, the calculation method of the steel strain at the crack which is the key parameter in this model is given. Comparison between experimental result and theoretical calculation on FRP stain distribution in beam indicates that the analytical model can well predict the test results.

scholarly journals ANALYTICAL MODEL TRACING DEFORMATIONS IN MULTISTOREY LARGE TIMBER PANEL BUILDING

2019 ◽  
Vol 25 (1) ◽  
pp. 19-26 ◽  
Author(s):  
Jaroslaw Malesza ◽  
Czeslaw Miedzialowski ◽  
Leonas Ustinovichius
Keyword(s):  
Analytical Model ◽  
Complex Model ◽  
Industrial Plant ◽  
Design Stage ◽  
Building Structures ◽  
Model Tracing ◽  
Modular Technology ◽  
And Control ◽  
Vertical Deformations ◽  
Design Construction

This paper deals with the deformation characteristics of wood-framed residential, small commercial and hotel buildings with sheathing. Recent building structures are based on large panel or modular technology, where elements in the form of diaphragms or modules are constructed in an industrial plant and then transported to the site for assembly. The document presents diagrams of building assembly and technologies for realization. The significant influence of excessive vertical deformations in multistorey wood-framed buildings on their performance and serviceability is underlined. These deformations are caused by different factors which are identified and analytically described. The paper outlines the analytically complex model for the evaluation and control of deformations in the design, construction and exploitation of multistorey wood-framed buildings. An example of the application of the proposed analytical model at the design stage concludes the paper.

Calculation Method for Rocking Die Motion Track in Cold Orbital Forging

2015 ◽  
Vol 138 (1) ◽  
Author(s):  
Xinghui Han ◽  
Xinchang Zhang ◽  
Lin Hua
Keyword(s):  
Experimental Study ◽  
Case Studies ◽  
Analytical Model ◽  
Calculation Method ◽  
Universal Motion ◽  
Orbital Forging ◽  
Geometry And Kinematics

In cold orbital forging, the rocking die performs complex motions on the components and the intervention between them cannot emerge, otherwise the components cannot be shaped successfully. Calculating the rocking die motion track is essential to determining whether there is intervention between the rocking die and components. Thus, this study aims to comprehensively investigate the rocking die motion track in cold orbital forging. For this purpose, an analytical model for calculating the rocking die motion track is first established. Then a universal motion track equation that can denote any geometry and kinematics relationships between the rocking die and components is obtained using this analytical model. To verify the validity of this motion track equation, an experimental study is conducted. The result shows that the calculated rocking die motion track is consistent with the experimental one. According to this valid motion track equation, the characteristics of the rocking die motion track are revealed. Finally, to apply the calculated rocking die motion track for analyzing the intervention between the rocking die and components, two case studies are examined.

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