scholarly journals Evaluating computer aided design tools for building performance: Trusting and defining the predetermined automated inputs

2021 ◽  
Author(s):  
ER Newmarch ◽  
Nilesh Bakshi ◽  
Michael Donn
Keyword(s):  
Thermal Properties ◽  
New Zealand ◽  
Computer Aided Design ◽  
Energy Performance ◽  
Building Performance ◽  
Design Tools ◽  
Software Packages ◽  
Significant Difference ◽  
Automated Simulation ◽  
Aided Design

BIM use is on the rise in New Zealand with popular software packages, including Revit and ARCHICAD, adopting a semi-automated simulation platform. This allows architects and designers to calculate the thermal and energy performance of their designs. This paper identifies the strengths and weaknesses of these semi-automated simulation platforms. The objective is to investigate how accurate their assumptions are in determining a reliable output for use in achieving compliance with Clause H1 of the New Zealand Building Code. To achieve this, this paper reports a comparative study that examines the program’s ability to calculate construction R-values, interpret thermal properties and simulate energy performance. The results from this study show that if used as delivered there is a significant difference between the simulation results of the two software packages, due to the assumptions built into the default settings. It also identifies the disadvantages of the inbuilt construction R-value calculators and explores a potential path to resolving this through redefining the inputs of thermal properties.

scholarly journals Evaluating computer aided design tools for building performance: Trusting and defining the predetermined automated inputs

2021 ◽  
Author(s):  
ER Newmarch ◽  
Nilesh Bakshi ◽  
Michael Donn
Keyword(s):  
Thermal Properties ◽  
New Zealand ◽  
Computer Aided Design ◽  
Energy Performance ◽  
Building Performance ◽  
Design Tools ◽  
Software Packages ◽  
Significant Difference ◽  
Automated Simulation ◽  
Aided Design

BIM use is on the rise in New Zealand with popular software packages, including Revit and ARCHICAD, adopting a semi-automated simulation platform. This allows architects and designers to calculate the thermal and energy performance of their designs. This paper identifies the strengths and weaknesses of these semi-automated simulation platforms. The objective is to investigate how accurate their assumptions are in determining a reliable output for use in achieving compliance with Clause H1 of the New Zealand Building Code. To achieve this, this paper reports a comparative study that examines the program’s ability to calculate construction R-values, interpret thermal properties and simulate energy performance. The results from this study show that if used as delivered there is a significant difference between the simulation results of the two software packages, due to the assumptions built into the default settings. It also identifies the disadvantages of the inbuilt construction R-value calculators and explores a potential path to resolving this through redefining the inputs of thermal properties.

HyperGear: An Object Oriented Design Program for Single Stage Gear Box Design

1991 ◽  
Author(s):  
Gary A. Gabriele ◽  
Agustî Maria I. Serrano
Keyword(s):  
Computer Aided Design ◽  
Object Oriented ◽  
Design Tool ◽  
Single Stage ◽  
Design Tools ◽  
Object Oriented Design ◽  
Computer Aided ◽  
Gear Box ◽  
Aided Design ◽  
Object Oriented Languages

Abstract The need for superior design tools has lead to the development of better and more complex computer aided design programs. Two of the more important new developments in application tools being investigation are Object Oriented Languages, and HyperMedia. Object Oriented Languages allow the development of CAD tools where the parts being designed and the design procedures specified are conceptualized as objects. This allows for the development of design aids that are non-procedural and more readily manipulated by the user trying to accomplish a design task. HyperMedia allows for the easy inclusion of many different types of data, such as design charts and graphs, into the tool that are normally difficult to include in design tools programmed with more conventional programming languages. This paper explores the development of a computer aided design tool for the design of a single stage gear box using the development HyperCard® environment and the HyperTalk® programming language. The resulting program provides a user friendly interface, the ability to handle several kinds of design information including graphic and textual, and a non-procedural design tool to help the user design simple, one stage gear boxes. Help facilities in the program make it suitable for undergraduate instruction in a machine elements design course.

Representing Relationships in Hierarchical Assemblies

1998 ◽  
Author(s):  
Jeff Heisserman ◽  
Raju Mattikalli
Keyword(s):  
Automated Reasoning ◽  
Computer Aided Design ◽  
Design System ◽  
Design Tools ◽  
Cad Tools ◽  
Automated Generation ◽  
Aircraft Systems ◽  
Computer Aided ◽  
Aided Design ◽  
Prototype Design

Abstract Computer aided design tools are gaining popularity in industry due to their ability to model the geometric aspects of products. This has shown substantial benefit for reducing the need and expense of building physical prototypes and allowing parts and tooling to be manufactured directly from these models. However, the current capabilities in existing CAD tools for modeling assemblies are quite limited. In this paper we introduce a representation for describing interfaces between parts within hierarchical assemblies for capturing functional and physical mating relations. This representation is designed to support automated reasoning and automated generation and modification of assemblies. It is also designed for use with very large assemblies, compactly representing the interfaces of parts and assemblies that are reused within larger assemblies. We describe how this representation is used in our prototype design system, Genesis, for designing aircraft systems.

Tools for Collaborative Business Process T Modeling

2010 ◽  
pp. 1643-1652 ◽  
Author(s):  
Paz Perez González ◽  
Jose M. Framinan
Keyword(s):  
Business Process ◽  
Process Modeling ◽  
Computer Aided Design ◽  
Process Management ◽  
Business Processes ◽  
Design Tools ◽  
Collaborative Business Process ◽  
Or Organization ◽  
Aided Design ◽  
Common Understanding

A business process can be defined as a set of related tasks that are carried out within a business or organization in order to obtain certain output that should add value for the business client or organization (Gunasekaran & Kobu, 2002). An enterprise can be then analyzed and integrated through its business processes. Thus, business process modeling (BPM) becomes a fundamental part of business process management, as it enables a common understanding and analysis of a company’s business processes. Particularly, BPM using computer-aided design tools and a standard visual form of notation to describe, validate, and simulate business processes has taken on a new importance (Jonah, 2002).

scholarly journals Comparative Study of the Trueness of the Inner Surface of Crowns Fabricated from Three Types of Lithium Disilicate Blocks

2019 ◽  
Vol 9 (9) ◽  
pp. 1798 ◽  
Author(s):  
Son ◽  
Yu ◽  
Yoon ◽  
Lee
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Lithium Disilicate ◽  
Correction Method ◽  
3D Analysis ◽  
Angular Region ◽  
Second Molar ◽  
Significant Difference ◽  
Inner Surface ◽  
Aided Design

This study set out to compare the three-dimensional (3D) trueness of crowns produced from three types of lithium disilicate blocks. The working model was digitized, and single crowns (maxillary left second molar) were designed using computer-aided design (CAD) software. To produce a crown design model (CDM), a crown design file was extracted from the CAD software. In addition, using the CDM file and a milling machine (N = 20), three types of lithium disilicate blocks (e.max CAD, HASS Rosetta, and VITA Suprinity) were processed. To produce a crown scan model (CSM), the inner surface of each fabricated crown was digitized using a touch-probe scanner. In addition, using 3D inspection software, the CDM was partitioned (into marginal, axis, angular, and occlusal regions), the CDM and CSM were overlapped, and a 3D analysis was conducted. A Kruskal–Wallis test (α = 0.05) was conducted with all-segmented teeth with the root mean square (RMS), and they were analyzed using the Mann–Whitney U-test and the Bonferroni correction method as a post hoc test. There was a significant difference in the trueness of the crowns according to the type of lithium disilicate block (p < 0.001). The overall RMS value was at a maximum for e.max (42.9 ± 4.4 µm), followed by HASS (30.1 ± 9.0 µm) and then VITA (27.3 ± 7.9 µm). However, there was no significant difference between HASS and VITA (p = 0.541). There were significant differences in all regions inside the crown (p < 0.001). There was a significantly high trueness in the angular region inside the crown (p < 0.001). A correction could thus be applied in the CAD process, considering the differences in the trueness by the type of lithium disilicate block. In addition, to attain a crown with an excellent fit, it is necessary to provide a larger setting space for the angular region during the CAD process.

An Augmented Reality Tool for Conceptual Design

2009 ◽  
Author(s):  
Andrew Koehring ◽  
Eliot Winer
Keyword(s):  
Augmented Reality ◽  
Conceptual Design ◽  
Computer Aided Design ◽  
Three Dimensions ◽  
Engineering Software ◽  
Engineering Design Process ◽  
Software Packages ◽  
Design Cycle ◽  
Aided Design ◽  
Comprehensive Modeling

Currently, there are many engineering software packages targeted toward high fidelity modeling. Computer aided design (CAD) tools are one example of this. The need for increasingly accurate models has caused this class of software to become even more detailed and comprehensive. Modeling a single design can be a time intensive process; so much so, that most modeling is done by specifically trained CAD professionals, not designers. These advancements in CAD software are at odds with the goal of conceptual design, which is to generate and evaluate as many concepts as possible in a limited amount of time. Within the engineering design process, changes made in preliminary stages have much greater impact for significantly less cost. Unfortunately, few software packages exist that are tailored for use so early in a product’s design cycle. This paper presents an application developed specifically for conceptual design. Through the use of an augmented reality environment, designers are able to quickly and intuitively assemble concepts. Potential designs can be easily manipulated in three dimensions, enhancing the ability to communicate the idea to others.

Sensible Pathways for Sensorium-Gameness Integration and Embedment in Design Tools for Multi-Phase Iterative Creative Synthesis in Design and Engineering Processes

2017 ◽  
Author(s):  
Robert E. Wendrich
Keyword(s):  
User Interfaces ◽  
Computer Aided Design ◽  
Low Cost ◽  
Sensor Technology ◽  
Design Tools ◽  
Tangible User Interfaces ◽  
Ongoing Research ◽  
Computer Aided ◽  
Multi Phase ◽  
Aided Design

Current and ongoing research and experimentations in the creation, design and build of low-cost, high-value prototypes for novel and unconventional interaction devices (IxD) in combination with cyber-physical system (CPS) (i.e. hybrid design tools (HDT), blended spaces) tangible user interfaces (TUI) and use of sensor technology lead to a variety of novel interaction modalities, experiences and possibilities. In line with this research, we propose a first prototype Human Sensor Selection Tool (HSST) as a preliminary guide and guidelines for design and engineering domains. The HSST is based on and inspired by the ‘five human senses’ [1], a plethora in human body signals (e.g. proprioceptive, vestibular) and gestures (e.g. facial expression, (e-)motions) that could be integrated, translated, transformed, adapted or mimicked to enhance and enrich the interaction modalities with for example computer-aided design (CAD), computer-aided technologies (CAx), and effectively affective CPS.

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