Flat Face Flanges With Metal-to-Metal Contact Beyond the Bolt Circle

1968 ◽  
Vol 90 (1) ◽  
pp. 82-88 ◽  
Author(s):  
R. W. Schneider
Keyword(s):  
Engineering Design ◽  
Analytical Approach ◽  
Design Method ◽  
Metal Contact ◽  
Uniform Thickness

A method of designing flat face flanges with metal-to-metal contact beyond the bolt circle is described. The design method takes into account the interaction between shell and flange and provides for continuity at the flange-shell junction. Weld neck flanges, where the hub is of uniform thickness, and flange rings welded directly to a shell are discussed in detail, however, the same analytical approach can be extended to include tapered, hubbed flanges. Although the approach is fundamentally rigorous, sophisticated analyses have been omitted in favor of making the method useful to most engineering design offices.

Axisymmetric, Nonidentical, Flat Face Flanges With Metal-to-Metal Contact Beyond the Bolt Circle

1969 ◽  
Vol 91 (3) ◽  
pp. 615-621 ◽  
Author(s):  
E. O. Waters ◽  
R. W. Schneider
Keyword(s):  
Analytical Approach ◽  
Design Method ◽  
Metal Contact ◽  
General Situation ◽  
Uniform Thickness ◽  
Account Interaction

A method of analyzing a pair of nonidentical, axisymmetric flat face flanges with metal-to-metal contact beyond the bolt circle is described. The design method takes into account interaction between opposing flanges in a bolted closure and provides for compatibility of deformations of all elements comprising the closure. The case of a blind cover to an integral flange having a hub of uniform thickness is described in detail. However, the same analytical approach can be extended to cover a tapered, hubbed flange or the general situation where a reducing flange is substituted for the blind cover.

Thermal loading of concrete bridges

1984 ◽  
Vol 11 (3) ◽  
pp. 423-429 ◽  
Author(s):  
Malcolm J. S. Hirst
Keyword(s):  
Solar Radiation ◽  
Engineering Design ◽  
Computer Model ◽  
Parametric Study ◽  
Structural Engineering ◽  
Thermal Loading ◽  
Design Method ◽  
Field Measurements ◽  
Concrete Bridges ◽  
Frequency Distributions

This paper presents the results of a parametric study into the thermal loading of concrete bridges by solar radiation. All results were obtained using a computer model calibrated from field measurements. The model computes the loading parameters from the bridge characteristics and the standard daily records of the weather bureau. The design method given uses an effective thickness concept to find the effects of a wearing course on the temperature profile of the underlying bridge. Thermal loading depends on climate and is extremely variable. Histograms are presented, which show the frequency distributions of the loading parameters for sample bridges at three Australian sites covering a range of climatic regimes from tropical to temperate. Key words: bridges, concrete, loads, temperature, solar radiation, structural engineering, design chart.

scholarly journals Effects of Multidisciplinary Participatory Design Method on Students’ Engineering Design Process

Eng ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 112-121
Author(s):  
Yu-Hung Chien ◽  
Chun-Kai Yao ◽  
Yu-Han Chao
Keyword(s):  
Engineering Design ◽  
Design Process ◽  
Participatory Design ◽  
Sequential Analysis ◽  
Design Method ◽  
Control Group ◽  
Teaching Model ◽  
Engineering Design Process ◽  
Design Activities ◽  
Experimental Group

This study took the ergonomics design course as an example to propose a design teaching model of multidisciplinary participatory design (MPD), and investigated the effects of this teaching model on the engineering design behavior of college students. We used lag behavior sequential analysis to compare the design behaviors of three student groups: a participatory design (PD) experimental group, an MPD experimental group, and a control group. The results of the study show that (1) students in the PD experimental group had 13 significant sequential engineering design behaviors, students in the MPD experimental group had 10, and students in the control group had only seven. The engineering design behaviors of the experimental groups were more diversified than those of the control group. (2) The three groups of students had a small number of significant design behavior transfers in the engineering design process, indicating that the students’ sequential design behaviors between two different design activities were insufficient. We concluded by detailing the pros and cons of using the MPD teaching model based on the results of this study, and hopefully by providing a reference for teaching engineering design.

scholarly journals Validation of the Design for Mass Adaptation Method – A Case for Higher Medical Treatment Quality

2020 ◽  
Vol 9 (1) ◽  
pp. 88-100
Author(s):  
Selin Üreten ◽  
Johanna Spallek ◽  
Ece Üreten ◽  
Dieter Krause
Keyword(s):  
Experimental Study ◽  
Data Collection ◽  
Engineering Design ◽  
Qualitative Data ◽  
Design Method ◽  
Treatment Quality ◽  
Data Collection And Analysis ◽  
High Treatment ◽  
Adaptation Method ◽  
Qualitative Data Collection

This contribution demonstrates the application of the new Design Method Validation System ( DMVS) for the validation of engineering design methods in product development. The application example is a case from the medical branch. The product design method Design for Mass Adaptation ( DfMAd) with individualization and modification steps as triggers is compared to an adapted design method with product individualization but without modification triggers. This experimental study was conducted in accordance with the DMVS procedure. Measured outcomes refer to the usefulness, applicability and acceptance of the design method DfMAd. Two groups of student participants were compared to each other through research tools based on quantitative and qualitative data collection and analysis. Findings show that the considered DfMAd phase successfully leads to the desired benefit for the consideration of variant-oriented alternatives, thus confirming the test hypothesis. In the example of a product, a crutch, a high treatment quality can be achieved by specific adaptability of the product. In addition, it is shown that DMVS is suitable for the development of experiments and that the data collection means are differently suited for the validation of the three criteria.

Engineering Design Based on Hammersley Sequences Sampling Method and SVR

2012 ◽  
Vol 544 ◽  
pp. 206-211 ◽  
Author(s):  
Li Ke ◽  
Hao Bo Qiu ◽  
Zhen Zhong Chen ◽  
Li Chi
Keyword(s):  
Engineering Design ◽  
Surrogate Model ◽  
Sampling Method ◽  
Simulation Analysis ◽  
Design Method ◽  
Computational Cost ◽  
Simulation Design ◽  
Fem Method ◽  
Computationally Expensive ◽  
Sample Method

Nowadays, computer-based engineering design is becoming widely used in the design of products. In the field of engineering, CAD model, FEM method and surrogate model are used to reduce the time and computational cost comparing with the traditional engineering design. But when facing with computationally expensive tasks, such design method mentioned above seems unable to deal with such tasks. In that case, surrogate model is gradually used and shows great potential in dealing with the computationally complex tasks. Although computing power and speed are rapidly growing, the use of the computer simulation analysis is limited in doing engineering design and some other analysis such as reliability analysis for complex product, so that it limits the use of metamodeling techniques. In that case, we use space-filling DOE sample method to support the construction of surrogate model. In this paper, we consider both Hammersley sequences and SVM as sampling method and surrogate model to construct the simulation design model, aiming at reduce computational costs. SVR achieves more accuracy and shows great potential in application in the design of complex and computationally expensive tasks.

scholarly journals Effects of the Design Parameters against Slab on Grade Volume Using Corps of Engineering Design Method

2019 ◽  
Vol 1198 (8) ◽  
pp. 082001
Author(s):  
Muhamad Taufik Costarico ◽  
Maulid Muhammad Iqbal ◽  
Joni Arliansyah
Keyword(s):  
Engineering Design ◽  
Design Method ◽  
Design Parameters

Failure Analysis and Transmission Parameters Optimization Design of WN Gears Drive

2012 ◽  
Vol 229-231 ◽  
pp. 449-452 ◽  
Author(s):  
Xiao Kai Mu ◽  
Yu Guang Li ◽  
Dian Hua Chen ◽  
Cheng Chao Li
Keyword(s):  
Failure Analysis ◽  
Engineering Design ◽  
Optimization Design ◽  
Optimization Problems ◽  
Design Method ◽  
High Strength ◽  
Parameters Optimization ◽  
Transmission Parameters ◽  
Compact Size ◽  
Improved Design

This paper taking the high strength of WN gears drive as target, which makes the WN gear device has light weight and compact size. The WN gears drive optimization design model of actual project is put forward by multiple-factor comprehensive failure analysis. The research is to solve nonlinear constrained optimization problems by the method of sequence quadratic programming (SQP) in MATLAB optimization toolbox. Using the optimization program of engineering design examples to analyze the relationship about gear drive parameters on contact and bending fatigue strength, thus the engineering design method of the WN gears drive is improved. This research not only achieved the optimization design of WN gears drive, but also revealed that the interactions between transmission parameters and strength design of the gear, which improved design efficiency and provided application foundation for CAD design of WN gears driving.

The Impact of Team-Based Product Dissection on Design Novelty

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Christine A. Toh ◽  
Scarlett R. Miller ◽  
Gül E. Okudan Kremer
Keyword(s):  
Engineering Design ◽  
Design Education ◽  
Engineering Students ◽  
Design Method ◽  
Idea Generation ◽  
Team Members ◽  
Design Concepts ◽  
Engineering Design Education ◽  
Current Design ◽  
The Impact

Although design novelty is a critical area of research in engineering design, most research in this space has focused on understanding and developing formal idea generation methods instead of focusing on the impact of current design practices. This is problematic because formal techniques are often not adopted in industry due to the burdensome steps often included in these methods, which limit the practicality and adoption of these methods. This study seeks to understand the impact of product dissection, a design method widely utilized in academia and industry, on design novelty in order to produce recommendations for the use or alterations of this method for supporting novelty in design. To investigate the impact of dissection, a study was conducted with 76 engineering students who completed a team-based dissection of an electric toothbrush and then individually generated ideas. The relationships between involvement in the dissection activity, the product dissected, the novelty and quantity of the ideas developed were investigated. The results reveal that team members who were more involved in the dissection activity generated concepts that were more novel than those who did not. In addition, the type of the dissected product also had an influence on design novelty. Finally, a positive correlation between the number of ideas generated and the novelty of the design concepts was identified. The results from this study are used to provide recommendations for leveraging product dissection for enhancing novelty in engineering design education and practice.

Design Method about Spherical Diaphragm Sealing of Tube Channel in High Pressure Heat Exchanger

2012 ◽  
Vol 538-541 ◽  
pp. 2164-2168
Author(s):  
Sun Yi Chen
Keyword(s):  
High Pressure ◽  
Heat Exchanger ◽  
Engineering Design ◽  
Design Method ◽  
Function Analysis ◽  
Arch Height ◽  
Design Technology ◽  
Engineering Structure ◽  
And Function ◽  
Tube Channel

Spherical diaphragm seal dish of tube channel open end in high pressure heat exchanger is a new engineering structure that used in petrochemical hydrogenation unit, and its design technology is not reported now. It is inconvenience to analyze each case by limited element method. Design method of formulas is proposed to calculate both radial offset displacement and its thickness of spherical diaphragm based on shell elasticity mechanics. Relation formulas are deduced about arch height, open end radius, offset displacement by geometry. Two presuppositions are deduced for spherical diaphragm successful to run according to technology theory and function analysis of seal dish structure, which can be used for engineering design.

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