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computational morphogenesis based structural design by using material topology optimization

MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES 2007年第1期35卷 39-58页

作者： Lee, Dongkyu Shin, Soomi Park, Sungsoo Univ Stuttgart Inst Struct Mech D-70550 Stuttgart Germany Pusan Natl Univ Dept Architectural Engn Pusan 609735 South Korea

This study proposes that appropriate topologies and shapes for structural design can be investigated through a computational morphogenesis of structural material topology optimization. Substantially, the morphogenesis has been motivated in order to properly describe mechanisms of natural and biological shapes such as tissues or cells. According to this concept, the numerical examples of architectural and civil structural designs for building walls or bridges demonstrate that the computational morphogenesis produces an aesthetic, functional, and safe structural design, when compared to the typical structural design.

关键词： aesthetic computational morphogenesis functional safe structural design structural material topology optimization

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computational morphogenesis and digital simulation of the construction process of masonry domes built without centrings 60

Computational morphogenesis and digital simulation of the co...

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60th Anniversary Symposium of the International-Association-for-Shell-and-Spatial-Structures (IASS SYMPOSIUM) / 9th International Conference on Textile Composites and Inflatable Structures (STRUCTURAL MEMBRANES)

作者： Esposito, Lorenzo Boccia, Gaetano B. Luporino, Alessandro Pone, Sergio Univ Napoli Federico II DiARC Dipartimento Architettura Via Toledo 402 I-80134 Naples Italy

ISBN: (纸本)9788412110104

The study investigates the design and construction processes of masonry domes built without the use of centrings. In particular, it focuses on those built using a 'compass', i.e. an erection device that simplifies the construction process, and guarantees the bricklaying accuracy. The foundation of this research project can be found in the work of Fabrizio Carola (1931-2019) who used an erection method for masonry domes inspired by the 'Nubian vault technique'. The design and construction processes used by Carola have been analyzed with the aim of identifying a sequence of operations, which were then simulated in a digital environment by means of recursive algorithms. Finally, the study moved to the implementation of two bespoke designed contraptions for the design of non-spherical domes. The result of this study is a computational tool which can be used to design different typologies of centring-less masonry domes and simulate their construction process.

关键词： masonry domes centring-less domes computational morphogenesis recursive algorithms

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A review on hybrid optimization algorithms to coalesce computational morphogenesis with interactive energy consumption forecasting

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ENERGY AND BUILDINGS 2015年 106卷 192-202页

作者： Mavromatidis, Lazaros Elias Univ Strasbourg INSA Strasbourg ICube UMR 7357 F-67084 Strasbourg France

The present review paper focuses on the exploration and qualitative evaluation of hybrid optimization methods applied to architectural design, computational morphogenesis and energy consumption problems. After introducing the computational morphogenesis notion and the novel institutional framework of nZEB labeling, we define here computational morphogenesis as a design procedure where the environmental qualities of the envelope and especially thermal storage and load shifting have the potential to guide an automation process of shape creation in the building scale. For this reason we focus on reviewing the well-cited literature on scale that introduced novel hybrid optimization tools especially developed for thermal load, energy consumption optimization and/or computational morphogenesis optimization issues. Different approaches and methods are reported in this review paper, while at the end of the paper an exhaustive list of conclusions and potential perspectives of these approaches is explicitly presented. Inexorably, we seek to review here hybrid optimization tools that are (or could be) applied on computational morphogenesis problems with the aim to optimize, facilitate and encourage a creative architectural design in relation to innovative envelope conception to promote interdisciplinary research coupling the fields of architectural design and building physics. (C) 2015 Elsevier B.V. All rights reserved.

关键词： computational morphogenesis Hybrid optimization methods Genetic algorithms Thermal storage Load shifting

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Space mapping-based computational morphogenesis of continuum structures using isolines with free-boundary design domain

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STRUCTURES 2022年 41卷 318-330页

作者： Ma, Zhenfu Cui, Changyu Harbin Inst Technol Sch Civil Engn Harbin 150090 Peoples R China Harbin Inst Technol Key Lab Smart Prevent Mitigat Civil Engn Disasters Harbin 150090 Peoples R China Harbin Inst Technol Sch Civil Engn 73Huanghe RdNanGang Dist Harbin 150090 Peoples R China

computational morphogenesis is widely used in the conceptual design of continuing structures to provide engineers with a desired design. A morphogenetic algorithm of the free-boundary continuum structure using isolines is proposed based on space mapping technology, referred to here as the isolines structural morphogenesis (ISM) method. The free-boundary initial design domain containing a parameter space and physical space is established by B-spline. Mechanics performance is analyzed in arbitrary physical space (the structure itself) and distributed to the regular parameter space. Determine the evolutionary threshold based on the distribution characteristics of design criteria. The threshold's isolines are extracted in the orthogonal grid of the parameter space and mapped to acquire a new structure boundary. A continuum structure with a free boundary that efficiently resists the load is generated by iteratively re-evaluating the behavior and updating the isolines until the required design is achieved. In addition, a coefficient matrix based on a regular grid was introduced to simplify the extraction of the isoline. The introduction of mapping space enriches the original modeling means and optimizes the structural design framework, making the morphogenesis of free-boundary continuum structures simple and efficient. Numerical examples show diverse designs of free-boundary continuum structures that verified the improved approach and revealed a novel design pathway of arbitrarily complex structures.

关键词： computational morphogenesis Mapping space Continuum structure Topology design

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A general framework dedicated to computational morphogenesis Part I - Constitutive equations

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BIOSYSTEMS 2018年 173卷 298-313页

作者： Siregar, Pridi Julen, Nathalie Hufnagl, Peter Mutter, George Integrat BioComp IBC Chantepie France Charite Univ Med Berlin Inst Pathol Dept Digital Pathol & IT Berlin Germany Harvard Med Sch Dept Pathol Boston MA USA Brigham & Womens Hosp 75 Francis St Boston MA 02115 USA

In order to understand living organisms, considerable experimental efforts and resources have been devoted to correlate genes and their expressions with cell, tissue, organ and whole organisms' phenotypes. This data driven approach to knowledge discovery has led to many breakthrough in our understanding of healthy and diseased states, and is paving the way to improve the diagnosis and treatment of diseases. Complementary to this data driven approach, computational models of biological systems based on first principles have been developed in order to deepen our understanding of the multi-scale dynamics that drives normal and pathological biological functions. In this paper we describe the biological, physical and mathematical concepts that led to the design of a computational morphogenesis (CM) platform baptized Generic Modeling and Simulating Platform (GMSP). Its role is to generate realistic 3D multi-scale biological tissues from virtual stem cells and the intended target applications include in virtuo studies of normal and abnormal tissue (re)generation as well as the development of complex diseases such as carcinogenesis. At all space-scales of interest, biological agents interact with each other via biochemical, bioelectrical, and mechanical fields that operate in concert during embryogenesis, growth and adult life. The spatio-temporal dependencies of these fields can be modeled by physics-based constitutive equations that we propose to examine in relation to the landmark biological events that occur during embryogenesis.

关键词： Biology of development computational morphogenesis computational biology Agents

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A general framework dedicated to computational morphogenesis Part II - Knowledge representation and architecture

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BIOSYSTEMS 2018年 173卷 314-334页

作者： Siregar, Pridi Julen, Nathalie Hufnagl, Peter Mutter, George Integrat BioComp IBC Chantepie France Charite Univ Med Berlin Dept Digital Pathol & IT Inst Pathol Berlin Germany Harvard Med Sch Dept Pathol Boston MA USA Brigham & Womens Hosp 75 Francis St Boston MA 02115 USA

In our previous paper we introduced morphogenesis and post-embryonic life as arising from cells interacting via coupled chemical, electrical and mechanical processes occurring across multiple organization levels. We reviewed these processes from the perspectives of developmental biology and how they relate to physics-based constitutive equations that are well suited to model intercellular interactions' fields. In this paper we will describe a knowledge representation and architectural design strategy that can organize and encode the biochemical, biological and biophysical data necessary to represent and model the highly specialized and diversified cells that constitute living tissues. Since there are about 200 different types of cells in mammalian tissues, a huge amount of molecular, cellular and tissue data must be accounted for. This data cannot be incorporated in an ad hoc manner but, on the contrary, must be organized according to some sound principles. We give an overview of these principles and describe how they can be incorporated as proper features of a Knowledge Base System (KBS) dedicated to computational morphogenesis (CM).

关键词： computational morphogenesis Knowledge representation Inference Agents

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computational morphogenesis of three-dimensional free-form structures using isosurfaces based on space mapping

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COMPUTERS & STRUCTURES 2023年 289卷

作者： Ma, Zhenfu Cui, Changyu Harbin Inst Technol Sch Civil Engn Harbin 150090 Peoples R China Harbin Inst Technol Key Lab Smart Prevent & Mitigat Civil Engn Disast Minist Ind & Informat Technol Harbin 150090 Peoples R China

This paper presented a novel computational morphogenesis method based on space mapping that employed isosurfaces to generate three-dimensional free-form continuum structures from design domains of arbitrary complexity. To achieve the interaction between form and performance, a mapping was established between the parameter space and the physical space of the design domain using B-spline volume modelling. Two assumptions were introduced to ensure that the entire parameter space has mechanical properties equivalent to those of the physical space. The isosurfaces of criterion thresholds were extracted from the entire parameter space and mapped into the physical space as the boundaries of the new design. The proposed methodology effectively addresses the limitations of the non-orthogonal body-fitted meshes for structural analysis. It comprehensively reflected the redistribution of mechanical performance and yielded an optimal design at the global-structural level. Furthermore, a geometric matrix was developed for the marching cubes algorithm, which streamlines the process of extracting isosurfaces. Numerical examples were presented to validate the method, demonstrating its ability to generate free-form structures with smooth boundaries, innovative shapes, and rational topology. The unexpected architectural form can provide valuable references for conceptual design in engineering applications.

关键词： computational morphogenesis Space mapping Isosurface extraction Topology optimization free-form structures

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computational morphogenesis: Its Current State and Possibility for the Future

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International Journal of Space Structures 2010年第2期25卷 75-82页

作者： Hiroshi Ohmori Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Japan

computational morphogenesis is the word generally used for expressing those techniques or ways of thought by which the configuration or the system of structures is generated mainly through the usage of computers, which is realized on the firm foundation of both FEM as a tool of numerical analysis and various methods based on relatively newly-developed algorithms for structural optimization. Recently, it has been gaining a considerable number of users such as structural engineers or architects for the structural design of actual buildings as well as proposals for architectural competitions. Here we present the state of the art in computational morphogenesis especially in Japan as well as the future prospects for computational morphogenesis.

关键词： computational morphogenesis structural optimization structural design

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computational morphogenesis OF LIGHTWEIGHT CONTINOUS CONCRETE SHELL STRUCTURES BY UTILIZING METAHEURISTIC ALGORITHMS

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JOURNAL OF THE INTERNATIONAL ASSOCIATION FOR SHELL AND SPATIAL STRUCTURES 2024年第3期65卷 171-188页

作者： Vatandoost, Mohsen Golabchi, Mahmood Ekhlassi, Ahmad Rahbar, Morteza Univ Tehran Coll Fine Arts Fac Architecture Architectural Technol Tehran Iran Iran Univ Sci & Technol Coll Architecture & Environm Design Tehran Iran

While the hanging model and physical prototyping are reliable methods for form-finding continuous lightweight shell structures, they cannot explore various design possibilities and consider multiple criteria in the design. This research aims to employ metaheuristic algorithms as a search tool for simultaneous form-finding (form exploration) and optimization, known as computational morphogenesis. This workflow consists of a parametric model and metaheuristic algorithms, which were implemented through costume Python codes. To evaluate the workflow, a double-curvature footbridge was defined, and the forms that GA found were in line with the anticipation. The GA found a better solution (0.04022) than the SA (0.064) by considering elastic energy change. In case study II, the optimal form of a continuous lightweight shell was explored by utilizing GA, PSO, SA, and the hybrid algorithm of GAPSO. The GA improved the fitness solution by 35% in the second run, while PSO showed similar results, and the hybrid GAPSO algorithm did not yield better results. The results show that the optimum result based on different algorithms was not significantly different. Nevertheless, hyperparameters considerably affected finding the global minimum. Moreover, NSGA-II was utilized, which let the designer tradeoff between alternatives while considering other criteria.

关键词： shell structures form-finding structural optimization computational morphogenesis multi-objective Optimization NSGA-II

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Speeding up computational morphogenesis with Online Neural Synthetic Gradients

Speeding up Computational Morphogenesis with Online Neural S...

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International Joint Conference on Neural Networks (IJCNN)

作者： Zhang, Yuyu Chi, Heng Chen, Binghong Tang, Tsz Ling Elaine Mirabella, Lucia Song, Le Paulino, Glaucio H. Georgia Inst Technol Atlanta GA 30332 USA Siemens Corp Technol Princeton NJ USA

ISBN: (纸本)9780738133669

A wide range of modern science and engineering applications are formulated as optimization problems with a system of partial differential equations (PDEs) as constraints. These PDE-constrained optimization problems are typically solved in a standard discretize-then-optimize approach. In many industry applications that require high-resolution solutions, the discretized constraints can easily have millions or even billions of variables, making it very slow for the standard iterative optimizer to solve the exact gradients. In this work, we propose a general framework to speed up PDE-constrained optimization using online neural synthetic gradients (ONSG) with a novel two-scale optimization scheme. We successfully apply our ONSG framework to computational morphogenesis, a representative and challenging class of PDE-constrained optimization problems. Extensive experiments have demonstrated that our method can significantly speed up computational morphogenesis (also known as topology optimization), and meanwhile maintain the quality of final solution compared to the standard optimizer. On a large-scale 3D optimal design problem with around 1,400,000 design variables, our method achieves up to 7.5x speedup while producing optimized designs with comparable objectives.

关键词： computational morphogenesis PDE-constrained optimization neural synthetic gradients deep learning

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