Modification Method by Increasing and Decreasing Elements in the Emergent Design System

2011 ◽  
Vol 422 ◽  
pp. 807-810 ◽  
Author(s):  
Akira Kito ◽  
Yuki Mizumachi ◽  
Mitsuhiro Sekiguchi ◽  
Koichiro Sato ◽  
Yoshiyuki Matsuoka
Keyword(s):  
Global Solution ◽  
Structural Design ◽  
Design System ◽  
Past Study ◽  
Evaluation Standard ◽  
The Past ◽  
Modification Method ◽  
Design Solutions ◽  
Emergent Design ◽  
Design Ideas

This paper describes a modification method which strengthens forms for deriving diverse design solutions in structural design. In the early process of design, diverse design ideas are generated from a global solution search under unclear design conditions. In the past study, we have proposed the emergent design system, which allows a global solution search under limited design conditions to derive diverse design solutions. The proposed system derives geometrically novel in forms, but most of them do not satisfy the evaluation standard so that they are not applicable as solutions. Therefore, if we can modify these forms to applicable solutions, the diversity of applicable solutions would increase. In this paper, we propose a modification method which satisfies the evaluation standard by increasing and decreasing elements, and show the possibility of increasing the diversity of solutions.

Simulation of Developmental Process of Organism and Application to Structural Design

2005 ◽  
Vol 9 (2) ◽  
pp. 142-149 ◽  
Author(s):  
Masato Inoue ◽  
◽  
Yoshiyuki Matsuoka
Keyword(s):  
Structural Design ◽  
Developmental Process ◽  
Design Method ◽  
Design System ◽  
Generation System ◽  
Improve Design ◽  
Form Generation ◽  
Ancient Times ◽  
Design Solutions ◽  
Design Ideas

In the early processes of design called conceptual and preliminary design, diverse design ideas must be obtained under the constraint of unclear design conditions. Since ancient times, designers have been referred to form and structure of natural organism to create new artifacts. Design method referencing organisms could develop new designs and improve design capabilities. This paper describes a design system referencing emergent organism evolution, diversity, and environmental adaptation to obtain diverse design solutions. We simulate developmental process of organism, "induction" and "apical dominance" for diverse organism morphogenesis and propose form-generation system for obtaining diverse design solutions in a self-organizing manner using cellular automata. Generated organisms are adapted to the environment. We add a process in which forms are structurally adapted, optimizing diverse design ideas. To verify effectiveness proposal, we apply our proposal to the structural design of chairs. We discuss the effectiveness of our proposal applying organism morphogenesis for obtaining diverse design solutions.

scholarly journals Looking at the Nudibranch Family Myrrhinidae (Gastropoda, Heterobranchia) from a Mitochondrial ‘2D Folding Structure’ Point of View

Life ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 583
Author(s):  
Giulia Furfaro ◽  
Paolo Mariottini
Keyword(s):  
16S Rrna ◽  
Phylogenetic Analyses ◽  
Integrative Taxonomy ◽  
Point Of View ◽  
Past Study ◽  
Mitochondrial Coi ◽  
The Past ◽  
Combining Data ◽  
Folding Structure ◽  
Comparison Of The Results

Integrative taxonomy is an evolving field of multidisciplinary studies often utilised to elucidate phylogenetic reconstructions that were poorly understood in the past. The systematics of many taxa have been resolved by combining data from different research approaches, i.e., molecular, ecological, behavioural, morphological and chemical. Regarding molecular analysis, there is currently a search for new genetic markers that could be diagnostic at different taxonomic levels and that can be added to the canonical ones. In marine Heterobranchia, the most widely used mitochondrial markers, COI and 16S, are usually analysed by comparing the primary sequence. The 16S rRNA molecule can be folded into a 2D secondary structure that has been poorly exploited in the past study of heterobranchs, despite 2D molecular analyses being sources of possible diagnostic characters. Comparison of the results from the phylogenetic analyses of a concatenated (the nuclear H3 and the mitochondrial COI and 16S markers) dataset (including 30 species belonging to eight accepted genera) and from the 2D folding structure analyses of the 16S rRNA from the type species of the genera investigated demonstrated the diagnostic power of this RNA molecule to reveal the systematics of four genera belonging to the family Myrrhinidae (Gastropoda, Heterobranchia). The “molecular morphological” approach to the 16S rRNA revealed to be a powerful tool to delimit at both species and genus taxonomic levels and to be a useful way of recovering information that is usually lost in phylogenetic analyses. While the validity of the genera Godiva, Hermissenda and Phyllodesmium are confirmed, a new genus is necessary and introduced for Dondice banyulensis, Nemesis gen. nov. and the monospecific genus Nanuca is here synonymised with Dondice, with Nanuca sebastiani transferred into Dondice as Dondice sebastiani comb. nov.

Application of Plastic Region Bolt Tightening to Flange Joint Assembly: Behavior of Large Diameter Flange

2009 ◽  
Author(s):  
Shinobu Kaneda ◽  
Hirokazu Tsuji
Keyword(s):  
Internal Pressure ◽  
Large Diameter ◽  
Plastic Region ◽  
Load Factor ◽  
Past Study ◽  
Flange Joint ◽  
The Past ◽  
Sealing Performance ◽  
Assembly Behavior ◽  
Bolted Flange

In the past study the plastic region tightening has been applied to the bolted flange joint with smaller nominal diameter and its advantages have been demonstrated, however, behavior of the bolted flange joint with larger diameter is not investigated. Flange rotation of the bolted flange joint with large diameter increases when the internal pressure is applied. Gasket stress is not uniform and it may cause leak accident. So, it is necessary to investigate the behavior of the larger diameter flange. The present paper describes the behavior of bolted flange joint with large diameter under plastic region tightening. Firstly, API 20-inch flange joint tightened to the plastic region by bolt with a smaller diameter and superiority in the uniformity of the axial bolt force is demonstrated. And then the internal pressure is applied to the bolted flange joint and the behavior of the additional axial bolt force is demonstrated. The axial bolt force decreases with increasing the internal pressure, and the load factor is negative due to increasing of the flange rotation. However, the load factor of the bolted flange joint tightened to the plastic region by using the bolt with the smaller diameter approached zero. Using the bolts with smaller diameter is advantageous to the flange joint with the larger diamter, whose load factor is negative, to prevent the leakage. Additionally, the leak rate from the bolted flange joint is measured and the sufficient sealing performance is obtained.

Using the Explicit Dynamic Method to Simulate Pile Dynamical Driving Process

2010 ◽  
Vol 163-167 ◽  
pp. 366-371
Author(s):  
Jian Bing Lv ◽  
He Lin Fu ◽  
Hua Zhi Li ◽  
Zhe Liu
Keyword(s):  
Method Development ◽  
Elastic Solid ◽  
Computational Method ◽  
Dynamical Analysis ◽  
Pile Driving ◽  
Past Study ◽  
Analysis Method ◽  
The Past ◽  
Explicit Dynamic ◽  
Dynamical Stress

The dynamic pile driving process is so complex that till now the analysis on the process had been focusing on the filed test or laboratory test. However, the past study about the dynamic process is a time consuming one; with the computational method development, the numerical simulation on this process is possible. In this paper, explicit dynamical analysis method is adopted, the pile is simulated using the elastic solid element, two computational cases are considered and finally the pile driving process dynamical stress is studied.

Example of Intelligent Structural Design System

1988 ◽  
Vol 2 (4) ◽  
pp. 329-345 ◽  
Author(s):  
Chee‐Kiong Soh ◽  
Ai‐Kah Soh
Keyword(s):  
Structural Design ◽  
Design System

Discussion Notes for a Review of Progress in Design of Large SES

1975 ◽  
Vol 12 (03) ◽  
pp. 254-259
Author(s):  
W. F. Perkins
Keyword(s):  
High Speed ◽  
Surface Effect ◽  
Commercial Application ◽  
Considerable Effort ◽  
Technical Design ◽  
Design Problems ◽  
Technical Problems ◽  
The Past ◽  
Design Solutions ◽  
Near Term

These notes are prepared to highlight some of the points in a review of progress in the development of oceangoing surface effect ships over the past ten years. In 1965, considerable interest was generated with respect to the application of large—more than 4000-tons—SES in ocean commerce. Since that time, considerable effort has been devoted to addressing the technical design problems associated with such ships. Emphasis has shifted in the near term to a military ship of about 2000-tons gross weight. Nonetheless, many of the design solutions to technical problems at the 2000-ton size are applicable to any large, high-speed SES. Thus, progress and success in the Navy programs can lead eventually to commercial application of SES.

Redefining Light Weight Structural Design for Gas Marginal Field Development Through Conductor Supported Platform CSP Concept

2021 ◽  
Author(s):  
Shiiun Bak Wong ◽  
Nur Dalila Alias ◽  
Mohd Kamal Arif ◽  
Majid Shabazi
Keyword(s):  
Water Depth ◽  
Structural Design ◽  
Fast Track ◽  
Low Cost ◽  
Light Weight ◽  
Field Development ◽  
The Past ◽  
Structural Concept ◽  
The Common ◽  
Marginal Field

Abstract The rise of offshore marginal field development and low-cost CAPEX has given an impetus to O&G operators to challenge the common structural platform design especially for wellhead platform type. Demand to reduce the platform weight has been observed for the past 20 years. Typically, the challenge to meet this demand will be tremendous once the water depth exceed 50m. This paper will elaborate on how using an engineered design approach was implemented to obtain fast track onshore fabrication and offshore installation and meet the operator demand for minimal structural concept.

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