Design Method of a New Type of Expansive Stressed Grouted Clamp

2013 ◽  
Vol 838-841 ◽  
pp. 586-592
Author(s):  
Cong Li ◽  
Xiang Shi
Keyword(s):  
Structural Strength ◽  
Design Method ◽  
Design Procedure ◽  
Experiment Data ◽  
The Core ◽  
Practical Design ◽  
New Type ◽  
Previous Design ◽  
Stress Formation ◽  
Design Experience

Considering the different mechanism of self-stress formation, a new type of structure was proposed for expansive grouted clamp, which is used for underwater repair on steel tubular. Since the structure is changed totally, the corresponding design method should be modified. This paper summarizes a design method of the new type of expansive stressed grouted clamp and sorts out a set of practical design procedure for the new structure. The core principles of the design method are based on the checks on slip capacity, member crushing and structural strength, associated with the experiment data and previous design experience as reference. An example of such clamp design for repairing a horizontal brace of a jacket platform is also introduced to describe how this method works.

An optimum synthesis for gripping mechanisms by using natural coordinates

2002 ◽  
Vol 216 (6) ◽  
pp. 643-653 ◽  
Author(s):  
M Ceccarelli ◽  
J Cuadrado ◽  
D Dopico
Keyword(s):  
Design Problem ◽  
Optimization Design ◽  
Design Method ◽  
Design Procedure ◽  
Natural Coordinates ◽  
Dimensional Synthesis ◽  
Efficient Procedure ◽  
Optimum Synthesis ◽  
Practical Design ◽  
Design Requirements

In this paper a simple and efficient procedure for optimum dimensional synthesis of gripping mechanisms is presented. The proposed design method is based on a suitable formulation of grasping performance of gripping mechanisms and makes use of a description of mechanisms by means of natural (fully Cartesian) coordinates. The optimization design problem is formulated by an objective function describing the main grasping performance and constraints prescribing practical design requirements and mechanism peculiarities. A numerical example is reported and discussed to illustrate the engineering feasibility of the proposed design procedure.

scholarly journals Scheme Design and Data Analysis of Critical Physical Experiment for Hexagonal Casing Type Fuel Reactor

2021 ◽  
Vol 9 ◽  
Author(s):  
Wang Lianjie ◽  
Wei Yanqin ◽  
Lou Lei ◽  
Huang Shien
Keyword(s):  
Design Method ◽  
Physical Experiment ◽  
Design Code ◽  
Experiment Data ◽  
Scheme Design ◽  
The Core ◽  
Physical Experiments ◽  
Fuel Reactor ◽  
Type Fuel ◽  
Loading Scheme

Based on the requirement of Hexagonal Casing Type Fuel Reactor (HCTFR) nuclear design and the critical physical experiment design method introduced by a single factor, 11 core critical physical experiments are proposed to validate the calculation accuracy and reliability of the nuclear design code CPLEV2. The experiment loading scheme fully takes into account the various components and more than one irradiate hole in the HCTFR core, which is used as critical physical experiment schemes successfully. According to the critical physical experiment data, the reactivity calculation deviations of all critical physical experiments are within ±1.0%. The validation results show that the nuclear design code CPLEV2 has high calculation accuracy and reliability for the core of hexagonal casing type fuel, and it can be used for HCTFR nuclear design.

scholarly journals Development of Practical Design Approaches for Water Distribution Systems

2019 ◽  
Vol 9 (23) ◽  
pp. 5117
Author(s):  
Young Hwan Choi ◽  
Ho Min Lee ◽  
Jiho Choi ◽  
Do Guen Yoo ◽  
Joong Hoon Kim
Keyword(s):  
Optimal Design ◽  
Distribution Systems ◽  
Water Distribution ◽  
Design Method ◽  
Water Distribution Systems ◽  
Computation Time ◽  
Practical Design ◽  
Previous Design ◽  
Design Factors ◽  
Pipe Size

The optimal design of water distribution systems (WDSs) should be economical, consider practical field applicability, and satisfy hydraulic constraints such as nodal pressure and flow velocity. However, the general optimal design of a WDSs approach using a metaheuristic algorithm was difficult to apply for achieving pipe size continuity at the confluence point. Although some studies developed the design approaches considering the pipe continuity, these approaches took many simulation times. For these reasons, this study improves the existing pipe continuity search method by reducing the computation time and enhancing the ability to handle pipe size continuity at complex joints that have more than three nodes. In addition to more practical WDSs designs, the approach considers various system design factors simultaneously in a multi-objective framework. To verify the proposed approach, the three well-known WDSs to apply WDS design problems are applied, and the results are compared with the previous design method, which used a pipe continuity research algorithm. This study can reduce the computation time by 87% and shows an ability to handle complex joints. Finally, the application of this practical design technique, which considers pipe continuity and multiple design factors, can reduce the gap between the theoretical design and the real world because it considers construction conditions and abnormal situations.

Practical Design Procedure for Thin-Skinned Steel-Concrete Composite Sections

2011 ◽  
Vol 243-249 ◽  
pp. 1421-1424
Author(s):  
Xing Ma
Keyword(s):  
Design Procedure ◽  
Thin Plates ◽  
Effective Width ◽  
Governing Equations ◽  
Concrete Material ◽  
The Core ◽  
Practical Design ◽  
Steel Composite ◽  
Core Concrete ◽  
Adhesive Forces

In this paper, a practical design procedure for thin-skinned steel-composite composite panels subjected to axial or flexural loadings is developed. Ignoring the adhesive forces between steel and core concrete, steel skins may be modeled as thin plates resting on tensionless rigid or elastic foundations (concrete material). Sections of steel skin tend to become separated (delaminated) from the core concrete and buckle away from it, while other areas keep contact with the inside material. This phenomenon is named as contact buckling. Based on the governing equations of thin plates in contact area and noncontact area, initial buckling response of thin skins may be obtained. Then it becomes possible to use effective width-based formulas to deduce ultimate strengths of the unilaterally constrained skins. At last, design formulas for section capacity of composite members due to axial and flexural loadings are developed.

A simplified earthquake resistant design method for base isolated multistorey structures

1991 ◽  
Vol 24 (3) ◽  
pp. 238-250 ◽  
Author(s):  
Takim Andriono ◽  
Athol J. Carr
Keyword(s):  
Design Method ◽  
Design Procedure ◽  
Simplified Approach ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Practical Design ◽  
Inertia Forces

This paper describes the step-by-step design procedure of a simplified approach proposed for use in practical design of base isolated multi-storey structures. The proposed method can be used to accurately estimate the inertia forces, not only at the level of the isolation devices but throughout the height of the structure.

Design Procedure for Fire-Exposed Preloaded Rectangular RC Columns Strengthened with Post-Compressed Plates

2014 ◽  
Vol 1049-1050 ◽  
pp. 469-473
Author(s):  
Lu Wang ◽  
Ray Kai Leung Su
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Design Method ◽  
Design Procedure ◽  
Building Structures ◽  
Structural Components ◽  
Rc Columns ◽  
Significant Damage ◽  
Concrete Building ◽  
New Type

It is well known that fires can cause significant damage to reinforced concrete building structures. In many cases, fire would only affect some parts of the building. It is therefore more economical and environmentally friendly to repair the fire-exposed structural components rather than to demolish the whole buildings. In this paper, a summary of experimental study of fire-exposed rectangular reinforced concrete (RC) columns repaired with post-compressed plates (PCP) is described. In the meantime, the design method for this new type of PCP repairing fire-exposed RC columns that can ensure proper repairing details for desirable performance is presented.

scholarly journals A Two-Round Optimization Design Method for Aerostatic Spindles Considering the Fluid–Structure Interaction Effect

2021 ◽  
Vol 11 (7) ◽  
pp. 3017
Author(s):  
Qiang Gao ◽  
Siyu Gao ◽  
Lihua Lu ◽  
Min Zhu ◽  
Feihu Zhang
Keyword(s):  
Optimal Design ◽  
Optimization Design ◽  
Design Method ◽  
Fluid Structure Interaction ◽  
Design Procedure ◽  
Design Parameters ◽  
Geometrical Parameters ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Aerostatic Spindle

The fluid–structure interaction (FSI) effect has a significant impact on the static and dynamic performance of aerostatic spindles, which should be fully considered when developing a new product. To enhance the overall performance of aerostatic spindles, a two-round optimization design method for aerostatic spindles considering the FSI effect is proposed in this article. An aerostatic spindle is optimized to elaborate the design procedure of the proposed method. In the first-round design, the geometrical parameters of the aerostatic bearing were optimized to improve its stiffness. Then, the key structural dimension of the aerostatic spindle is optimized in the second-round design to improve the natural frequency of the spindle. Finally, optimal design parameters are acquired and experimentally verified. This research guides the optimal design of aerostatic spindles considering the FSI effect.

The Design of Home Intelligent Power Node Based on ZigBee

2015 ◽  
Vol 719-720 ◽  
pp. 561-566
Author(s):  
Yong Qing Gao ◽  
Dan Shanng
Keyword(s):  
Network Node ◽  
Power Parameter ◽  
Home Gateway ◽  
The Core ◽  
Intelligent Home ◽  
Overload Protection ◽  
Zigbee Protocol ◽  
New Type ◽  
Parameter Monitoring

Firstly, this paper analyzes the significance and demand of intelligent power. Then a solution of home intelligent power system based on ZigBee is proposed. Hardware components of the solution proposed in this work mainly consists of AT91SAM9G20 as the core of the home gateway controller, CC430F6137 as the core of the network node of intelligent power and construction of intelligent home network system. This paper mainly introduces a new type of home intelligent power consumption network node, which realizes the measurement of electric power parameter, monitoring, overload protection and timing control, the communication between home gateway and network node through ZigBee protocol, the intelligent household electricity. By testing and using, it can meet the aspects of everyday life needs of user in convenient life, intelligent life and energy-saving, etc. It brings great commercial return and technical value to the development and application of intelligent home in future, as well as far-reaching impact to improving the quality of intelligent home services.

AN INDEPENDENT ACTIVE BALANCER FOR PLANAR MECHANISMS

2007 ◽  
Vol 31 (2) ◽  
pp. 167-190 ◽  
Author(s):  
Zhang Ying ◽  
Yao Yan-An ◽  
Cha Jian-Zhong
Keyword(s):  
Working Conditions ◽  
Design Method ◽  
Design Procedure ◽  
Vibration Absorber ◽  
Planar Mechanisms ◽  
Dynamic Balancing ◽  
Joint Coupling ◽  
Design Requirements ◽  
Novel Concept ◽  
Two Degree Of Freedom

This paper proposed a novel concept of active balancer for dynamic balancing of planar mechanisms. Somewhat similar to a vibration absorber, the active balancer is designed as an independent device, which is placed outside of the mechanism to be balanced and can be installed easily. It consists of a two degree-of-freedom (DOF) linkage with two input shafts, one of which is connected to the output shaft of the mechanism to be balanced by a joint coupling, and the other one is driven by a controllable motor. Flexible dynamic balancing adapted to different working conditions can be achieved by varying speed trajectories of the control motor actively. A design method is developed for selecting suitable speed trajectories and link parameters of the two DOF linkage of the balancer to meet various design requirements and constraints. Numerical examples are given to demonstrate the design procedure and to verify the feasibility of the proposed concept.

Study on Novel Automatic Steel Bundling Machine Pneumatic Control System

2012 ◽  
Vol 490-495 ◽  
pp. 594-597
Author(s):  
Cheng Qun Li ◽  
Liang Gao
Keyword(s):  
Control System ◽  
Control Program ◽  
Control Flow ◽  
Pneumatic Control ◽  
The Core ◽  
New Type ◽  
Action Process ◽  
And Control

This paper introduces a new type of automatic steel bundling machine for bundling process, which includes a pneumatic action process, mainly do some researches on the pneumatic control system. The system chooses PLC as the core control component, puts forward the hardware of control system and control flow. Eventually we have been designed the control program.

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