Vehicle Component Layout With Shape Morphing: An Initial Study

2006 ◽  
Author(s):  
Hong Dong ◽  
Georges M. Fadel ◽  
Vincent Y. Blouin
Keyword(s):  
Initial Study ◽  
Complex Problem ◽  
Layout Design ◽  
System Level ◽  
Component Level ◽  
Improve Design ◽  
Shape Morphing ◽  
Advantages And Disadvantages ◽  
Component Layout ◽  
Component Shape

This work focuses on incorporating component shape design into a vehicle configuration design or layout process. A concurrent design process consisting of performing layout design and simultaneous shape morphing of some select components is adopted to replace the traditional sequential design approach. The objective is to improve design efficiency and reduce design cost. Two important issues in the packing optimization with shape morphing problem are identified and studied: the morphing and the optimization. A parameterization-based morphing method and a mesh-based morphing method are implemented, and their advantages and disadvantages are discussed. To efficiently solve this complex problem, it is proposed to decompose it into a bi-level formulation: system level and component level. At the system level, the given functional objectives of the layout design problem are optimized with respect to component positions and orientations. At the component level, the shape of select components is morphed to minimize the overlap with other objects and the enclosure. By iterating between these two levels, the original problem is solved. This bi-level approach is intended to overcome the complexity of performing the placement simultaneously with the shape morphing.

Bi-level Approach to Vehicle Component Layout With Shape Morphing

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Hong Dong ◽  
Paolo Guarneri ◽  
Georges Fadel
Keyword(s):  
Large Scale ◽  
Layout Design ◽  
System Level ◽  
Component Level ◽  
Packing Problems ◽  
Engineering Research ◽  
Shape Morphing ◽  
Design Variables ◽  
Component Layout ◽  
Overall Performance

Engineering research into packing problems has been widely undertaken in recent years. The use of component shape morphing in layout design has, however, received little attention. Shape morphing is required for fitting a component of sufficient size in a limited space while optimizing the overall performance objectives of the vehicle and improving design efficiency. To morph components that can have arbitrary shapes in layout design, a mass-spring physical model-based morphing method is proposed and implemented. Vehicle layout design with shape morphing is a multi-objective, multilevel problem with a large number of design variables. To solve this large scale problem, decomposition is adopted. At the system level, the overall performance objectives are optimized with respect to locations and orientations of components. At the component level, deformable objects are morphed to fit in the available space. A vehicle underhood layout design problem is demonstrated to illustrate the proposed approach.

Dynamic Infrared System Level Fault Isolation

2003 ◽  
Author(s):  
John A. Naoum ◽  
Johan Rahardjo ◽  
Yitages Taffese ◽  
Marie Chagny ◽  
Jeff Birdsley ◽  
...  
Keyword(s):  
Fault Isolation ◽  
System Level ◽  
System Component ◽  
Component Level ◽  
Ir Imaging ◽  
Non Destructive

Abstract The use of Dynamic Infrared (IR) Imaging is presented as a novel, valuable and non-destructive approach for the analysis and isolation of failures at a system/component level.

System Level Bench Test for Trailing Arm Strength Estimation

2006 ◽  
Author(s):  
Jaychandar Muthu ◽  
Kanak Soundrapandian ◽  
Jyoti Mukherjee
Keyword(s):  
Failure Mode ◽  
Real Life ◽  
Element Model ◽  
Suspension System ◽  
System Level ◽  
Bench Test ◽  
Component Level ◽  
Arm Strength ◽  
Bench Testing ◽  
Nonlinear Finite Element Model

For suspension components, bench testing for strength is mostly accomplished at component level. However, replicating loading and boundary conditions at the component level in order to simulate the suspension system environment may be difficult. Because of this, the component's bench test failure mode may not be similar to its real life failure mode in vehicle environment. A suspension system level bench test eliminates most of the discrepancies between simulated component level and real life vehicle level environments resulting in higher quality bench tests yielding realistic test results. Here, a suspension level bench test to estimate the strength of its trailing arm link is presented. A suspension system level nonlinear finite element model was built and analyzed using ABAQUS software. The strength loading was applied at the wheel end. The analysis results along with the hardware test correlations are presented. The reasons why a system level test is superior to a component level one are also highlighted.

Identifying Critical Connections for the Global Performance of Steel Moment Resisting Frames

2018 ◽  
Vol 763 ◽  
pp. 165-173
Author(s):  
Paul Steneker ◽  
Lydell D.A. Wiebe ◽  
Andre Filiatrault
Keyword(s):  
Local Deformation ◽  
System Level ◽  
Single Type ◽  
Northridge Earthquake ◽  
Component Level ◽  
Moment Resisting Frames ◽  
Global Performance ◽  
Moment Resisting ◽  
Rbs Connections ◽  
Level Performance

The investigations following the unacceptable performance of moment resisting frames (MRFs) in the 1994 Northridge Earthquake led to the development of a variety of alternative ductile connections. Tests have shown that these connections have reliable component-level performance, leading to them being recommended in standards worldwide as pre-qualified for MRFs. Current design practice consists of applying a single type of ductile connection, often the reduced beam section (RBS), uniformly throughout an entire frame. These connections are detailed and inspected to ensure that each connection has a similar minimum deformation capacity throughout the building, regardless of local deformation demands.This paper examines the potential design implications of identifying local areas within a MRF having the greatest joint rotational demands. Once identified, the connections at these locations are deemed critical to the global performance of the frame. First, the collapse analysis of a six-storey MRF with well-detailed RBS connections was conducted to quantify an upper bound system-level performance. Thereafter, a lower bound system-level performance was determined by considering a frame constructed using only connections with a lowered rotational capacity. Subsequent series of analyses were conducted to identify critical locations within the frame where RBS connections must have a high reliable rotational capacity to ensure adequate system-level performance.

scholarly journals A Review of Recent Advancements in Offshore Wind Turbine Technology

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 579
Author(s):  
Taimoor Asim ◽  
Sheikh Zahidul Islam ◽  
Arman Hemmati ◽  
Muhammad Saif Ullah Khalid
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Structural Integrity ◽  
Turbine Blades ◽  
Offshore Wind ◽  
System Level ◽  
Offshore Wind Turbine ◽  
Component Level ◽  
Foundation Design ◽  
Offshore Wind Turbines

Offshore wind turbines are becoming increasingly popular due to their higher wind energy harnessing capabilities and lower visual pollution. Researchers around the globe have been reporting significant scientific advancements in offshore wind turbines technology, addressing key issues, such as aerodynamic characteristics of turbine blades, dynamic response of the turbine, structural integrity of the turbine foundation, design of the mooring cables, ground scouring and cost modelling for commercial viability. These investigations range from component-level design and analysis to system-level response and optimization using a multitude of analytical, empirical and numerical techniques. With such wide-ranging studies available in the public domain, there is a need to carry out an extensive yet critical literature review on the recent advancements in offshore wind turbine technology. Offshore wind turbine blades’ aerodynamics and the structural integrity of offshore wind turbines are of particular importance, which can lead towards system’s optimal design and operation, leading to reduced maintenance costs. Thus, in this study, our focus is to highlight key knowledge gaps in the scientific investigations on offshore wind turbines’ aerodynamic and structural response. It is envisaged that this study will pave the way for future concentrated efforts in better understanding the complex behavior of these machines.

scholarly journals PROMOTING LIBERAL EDUCATION THROUGH THE LONGITUDINAL STUDY OF CRITICAL THINKING: A RATIONALE AND PLAN

2021 ◽  
pp. 125-144
Author(s):  
Henry Braun ◽  
Katrina Borowiec
Keyword(s):  
Higher Education ◽  
Critical Thinking ◽  
Longitudinal Study ◽  
Liberal Education ◽  
Initial Study ◽  
Advantages And Disadvantages ◽  
Professional Success ◽  
Rigorous Research ◽  
Technical Issues ◽  
Missed Opportunity

In recent years, U.S. higher education has received much criticism for inadequately preparing students for the ‘real world.’ There is substantial empirical evidence (e.g., Arum & Roksa, 2011) that many students graduate with limited proficiency in key 21st century skills such as critical thinking (CT). Despite its importance in achieving personal advancement and professional success, there has been surprisingly little rigorous research on the development of CT during the undergraduate years. We believe this is a missed opportunity for higher education to better understand the various trajectories of CT development and to generate credible evidence to inform policies, programs, and practices – while also strengthening its standing among its various stakeholders. We argue that, despite a number of challenges, it is feasible to design and implement a comprehensive, longitudinal study of the development of CT (and related constructs). Although CT is an important learning objective at all colleges, it has special resonance for schools and programs that aim to provide a liberal education. For various reasons we propose that the initial study be conducted within a particular subset of such institutions; namely, a sample of American Jesuit colleges and universities. We discuss a number of technical issues germane to such a study, as well as the advantages and disadvantages of our preferred choice of an institutional sample.

scholarly journals Receiving and Responding to WhatsApp Official Group Messages Among Employees: An Early Interpretation Analysis

2018 ◽  
Vol 7 (4.38) ◽  
pp. 1030
Author(s):  
Nuredayu Omar ◽  
Che Su Mustaffa ◽  
Zuraidah Abu Talib
Keyword(s):  
Focus Groups ◽  
Small Group ◽  
Initial Study ◽  
Real Situation ◽  
The Real ◽  
Advantages And Disadvantages ◽  
Time Value ◽  
Initial Analysis ◽  
Universiti Utara Malaysia ◽  
Depth Interviews

The purpose of this article is to provide an initial analysis of the study related to the process of receiving and responding to the WhatsApp official group messages at work. Many previous studies have focused on the usage factors, advantages and disadvantages, as well as the implications of using WhatsApp. But this paper will reveal the interpretation of a small group of employees at Universiti Utara Malaysia of their roles and actions related to WhatsApp official group messages. A total number of five administrative and academic staffs had been involved in this initial study.  The results of this initial study will be used to strengthen the interview questions for the next phases of this study - focus groups and in-depth interviews, as well as the development of a questionnaire instrument. This initial study revealed that all Informants have joined at least one WhatsApp official group and have a number of other WhatsApp groups. Three dominant themes emerged and had been interpreted from the data as related to reception and feedback to the WhatsApp messages, namely the reception and message development; the use of appropriate grammar and manners; and the awareness of time value, respect differences, and message impacts to the organization. This study contributes to an understanding of the real situation of the usage of WhatsApp group in an organization where the selected employees are aware that every message they want to share with others may affect their organization.  

scholarly journals On relative ageing of coherent systems with dependent identically distributed components

2020 ◽  
Vol 52 (1) ◽  
pp. 348-376
Author(s):  
Nil Kamal Hazra ◽  
Neeraj Misra
Keyword(s):  
Sufficient Conditions ◽  
System Level ◽  
Hazard Rates ◽  
Coherent System ◽  
Coherent Systems ◽  
Component Level ◽  
Distributed Components ◽  
Two Systems

AbstractRelative ageing describes how one system ages with respect to another. The ageing faster orders are used to compare the relative ageing of two systems. Here, we study ageing faster orders in the hazard and reversed hazard rates. We provide some sufficient conditions for one coherent system to dominate another with respect to ageing faster orders. Further, we investigate whether the active redundancy at the component level is more effective than that at the system level with respect to ageing faster orders, for a coherent system. Furthermore, a used coherent system and a coherent system made out of used components are compared with respect to ageing faster orders.

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