Timber stairs. Structural design. Calculation methods

2014 ◽  
Keyword(s):  
Structural Design ◽  
Design Calculation ◽  
Calculation Methods

Discussion on Structural Design of O-Ring Seal Used in Aviation 28MPa Hydraulic System

2015 ◽  
Vol 779 ◽  
pp. 88-94
Author(s):  
Qing He Zhou
Keyword(s):  
Structural Design ◽  
Hydraulic System ◽  
Design Calculation ◽  
Calculation Methods ◽  
Design Standards ◽  
Design Engineers ◽  
Long Time ◽  
Ring Seal ◽  
Materials Used ◽  
Sealing Materials

Most of China's newly developed fighters are equipped with 28MPa hydraulic system rather than previous 21MPa hydraulic system since introduction of Russian S27 fighter production line. However, there is no truly applicable design standard guiding the sealing design of 28MPa hydraulic products in aviation applications although 28MPa hydraulic system has been applied in China's fielded fighters for quite a long time. In this article, the sealing standards both abroad and home and the sealing materials used by world-famous seal manufacturers are respectively investigated. In addition, calculation methods and allowable limits are recommended for the tensile and compression rate used in design calculation for sealing structure. All these recommended values can be referenced by sealing design engineers before China's high pressure sealing design standards are implemented.

Design calculation model of oil fluid property parameter knowledge database for production logging

2020 ◽  
Vol 20 (3) ◽  
pp. 951-958
Author(s):  
Wenguang Song ◽  
Qiongqin Jiang
Keyword(s):  
Crude Oil ◽  
Expert Knowledge ◽  
Calculation Model ◽  
Physical Parameters ◽  
Base System ◽  
Design Calculation ◽  
Calculation Methods ◽  
Fluid Property ◽  
Knowledge Base System ◽  
Parameter Values

The fluid property parameter calculation affects the accuracy of the interpretation the accuracy, in the interpretation of the liquid production profile. Therefore, it is particularly important to accurately calculate the physical property parameter values, in the establishment of the fluid property parameter expert knowledge base system. The main physical parameters include the following calculation methods of the oil. The oil property parameter conversion formula mainly studies the formulas such as bubble point pressure, dissolved gas-oil ratio, crude oil volume coefficient, crude oil density, crude oil viscosity, and crude oil compression coefficient. Design expert knowledge base system, it is based on the calculation methods of these physical parameters. A computational fluid property parameter model is constructed by training production log sample data. Finally, the interactive and friendly product interpretation software model was developed in 9 wells’ data. The design calculation model can increase the accuracy to achieve 95% of oil fluid property parameter. Accurately calculate fluid property parameter values.

scholarly journals Elaboration of an Expert System for Sizing, Designing and Verifying Flexible Pavements

2020 ◽  
Vol 30 (3) ◽  
pp. 94-121
Author(s):  
Nadjet Bouacha ◽  
Mouloud Belachia
Keyword(s):  
Expert System ◽  
The Body ◽  
Design Calculation ◽  
Complex Data ◽  
Data Loss ◽  
Calculation Methods ◽  
System Generator ◽  
Subsequent Degradation ◽  
Executable Programs ◽  
Made In

Abstract The use of expert systems in the world of civil engineering, and in particular for roads, has become a necessity for the reason of the particularity, complexity, and diversity of the influencing parameters at the level of the design calculation, the latter of which represents the major source of subsequent degradation. This system consists of proposing a tool for helping the user firstly to size the body of the roadway, with several analytical methods and models (Pre-project, Boussinesq, Westgaard, and Burmister), and secondly, to offer different design possibilities (thickness and type of the material) that make up the layers. Lastly, it is to calculate the stresses and strains in order to compare them with admissible limits. The management of a knowledge base of complex natures (words, sentences, numbers, symbols, tables, calculation methods, equations, conditions, etc.) requires an adequate methodology which goes beyond the simple use of the technology but enables you to imagine the process of regrouping this mass of complex data and classifying the data, which can then be integrated into a database or spreadsheets and external programs designed with code compatible with the expert system generator. Our contribution relates initially to the formulation, organization, and preparation of the algorithms, and then the starting of the programs in order to conceive fully executable programs, the latter of which we can call the expert system. The validation of such a system was made as the work progressed, changes were made in the formulation of the rules, and the order and orientation of the data in the knowledge that the advantage of this type of system is the possibility of permanently reinforcing the database with human expertise in the field, or in books, especially so that we can avoid data loss due to illnesses, retirement, etc.

Theoretical Design Research for Stirring Device of Fracturing Blender Truck

2012 ◽  
Vol 220-223 ◽  
pp. 909-912
Author(s):  
Tian Cheng Huang ◽  
De Guo Wang ◽  
Si Zhu Zhou ◽  
Xin Mei Yuan
Keyword(s):  
High Precision ◽  
Working Conditions ◽  
Design Research ◽  
High Efficiency ◽  
Design Calculation ◽  
Device Design ◽  
Calculation Methods ◽  
Theoretical Support ◽  
Theoretical Design ◽  
Large Discharge

In order to design reasonable-structure and high-efficiency stirring device, realizing development of high sand ratio, high precision and large discharge, according to blender truck actual working conditions and mixing fluid material characteristics, this paper chooses reasonable agitator paddle structure, paddle combination type and mixing tank structure, concludes calculation methods of stirring power, paddle strength and stirring axis design, providing the theoretical support to blender truck stirring device design calculation.

Design Method of Self-Loading Device of the Side-Crane Used for Container

2012 ◽  
Vol 466-467 ◽  
pp. 951-955
Author(s):  
Jun Qing Zhan ◽  
Xiao Mei Feng ◽  
Li Shun Li ◽  
Xiang De Meng
Keyword(s):  
Mathematical Model ◽  
Structural Design ◽  
Design Method ◽  
The Self ◽  
Design Calculation ◽  
Force Analysis ◽  
Loading Device ◽  
Calculation Results ◽  
The Mathematical Model ◽  
Flat Ground

The self-loading device used for side-crane is put forward. Its structure is presented. Based on the force analysis when the side-crane works at flat ground, the mathematical model is established when the crane working at uneven ground. And the design calculation is performed. The self-loading device’s optimal design is accomplished. Based on the above calculation results, the self-loading prototype is manufactured. And the design method can be adopted to the similar equipment’s structural design.

Study on the Design Methods Based on Beam Hinge Mechanism of Frame Beams in Seismic Zones

2011 ◽  
Vol 243-249 ◽  
pp. 1091-1095
Author(s):  
Jun Qing Guo ◽  
Shan Sheng Dong
Keyword(s):  
Design Calculation ◽  
Longitudinal Reinforcement ◽  
Design Practice ◽  
Calculation Methods ◽  
Rectangular Section ◽  
Plastic Hinges ◽  
Factors Affecting ◽  
Practical Design ◽  
Curvature Ductility ◽  
Components Analysis

With the calculation methods for the sectional curvature ductility of reinforced concrete flexural components, analysis was conducted on the factors affecting the formation of plastic hinges at the ends of RC frame beams and their rotational capacities; on the basis of which, singly-doubly reinforced rectangular section method for flexural design calculation was put forth, which is favorable to the realization of beam hinge mechanism. The analysis of a practical design case shows that the method proposed is not only beneficial to the formation of plastic hinges at the beam ends and their rotational capacities, but also results in considerable reduction of longitudinal reinforcement, hence lowering of cost, ease of construction, so that it is worthy of popularization and application in design practice.

New Method for the Structural Calculation of Concrete Rainwater Infiltration Design in City District

2012 ◽  
Vol 511 ◽  
pp. 167-170
Author(s):  
Yi Zhi Li ◽  
Liang Ming Hu ◽  
Si Yi Fan
Keyword(s):  
Empirical Formula ◽  
Design Calculation ◽  
Graphic Method ◽  
Calculation Methods ◽  
Rainwater Infiltration ◽  
City District ◽  
Structural Calculation ◽  
Calculation Results ◽  
Formula Method ◽  
Maximum Method

According to the shortage of common calculation methods-graphic and empirical formula method in city rainwater infiltration design calculation, a simple and feasible method called maximum method is proposed, then the detail description and comparison is given for the three kinds of calculation methods by a practical project. The calculation results have some difference between graphic method, maximum method and empirical formula method which has poor security. Maximum method and graphic method have the similar security, but maximum method makes the calculation simple by omitting a series of calculations and drawings. So, maximum method is recommended to calculate the rainwater infiltration design in city district.

scholarly journals Design of a new railway wagon for intermodal transport with the adaptable loading platform

2018 ◽  
Vol 235 ◽  
pp. 00030 ◽  
Author(s):  
Pavol Šťastniak ◽  
Pavol Kurčík ◽  
Alfréd Pavlík
Keyword(s):  
Structural Design ◽  
Simulation Analysis ◽  
Calculation Model ◽  
Virtual Model ◽  
Intermodal Transport ◽  
Calculation Methods ◽  
Safe Operation ◽  
Static And Dynamic Analysis ◽  
Railway Wagon ◽  
Computer Aided

The aim of the article is to present the structural design of freight railway wagon with variable use of loading space with regard to the safe operation and assessment of the properties by the calculation methods of simulation analysis. Virtual model of wagon was created in a computer program PTC/Creo. After creating the construction, the calculation model of the wagon frame was subjected to the static and dynamic analysis in programs ANSYS and ADAMS/Rail. On the basis of computer aided simulation analysis was optimized the chassis frame of the wagon. This wagon will be able to offer even more capacity and utilize less resources and energy than current wagons for intermodal transport.

Sign in / Sign up

Export Citation Format

Share Document