Form-Functions for the IBHVG Code

Lynn, Franz R

doi:10.21236/ada121669

Cited by 3 publications

(1 citation statement)

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“…Instead, with the aid of computer technologies, form has evolved into a fluid, dynamic, continuous state as described by Lynn's animate form (Lynn, 1999). The 'Embryological House' project, depicted in Figure 12, exemplifies this principle with its various variations (Lynn & Rappolt, 2008).…”

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confidence: 99%

The Evolution Narrative of Architectural Form and The State of Vital Form

UÇKAN,

DURSUN,

ÖZSOY

2023

Journal of Computational Design

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The concept of form in architectural design has been debated since prehistoric times. In its most straightforward meaning, form can be defined as the shape, shell, and inhabited volume of a structure. This study aims to explore the historical process of the transformation and evolution of form, as well as to discover new meanings and potentials of form through analysis, and to develop a critical perspective on form. The study is structured around three main axes. In the first stage, a mapping is designed to analyze the evolution of form throughout history. This mapping focuses on the changes in the approach to form, design, and making techniques chronologically. This stage reveals that form is no longer merely a final product represented by drawings or statically produced, but rather a concept that involves process and dynamism in a temporal-spatial dimension, whether in its design or production. In the second stage, the evolution of form is discussed through a new concept called ‘vital form’. While form represents something static or stationary, vital form signifies a dynamic and fluid state. While form is symbolically designed or produced by the designer from top to bottom, vital form represents a bottom-up, autonomous state formed by the influence of actors involved in design or production. Subsequently, the relationships, transitions, interactions, and changes between form and vital form, as well as their interpretations, are discussed within the proposed model in the study, based on conceptual sets derived from theoretical debates and the implications in design and making processes. It is believed that such exploration and awareness of form in architecture will bring new dimensions to the contemporary understanding, design, and making practices of form.

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confidence: 99%

The Evolution Narrative of Architectural Form and The State of Vital Form

UÇKAN,

DURSUN,

ÖZSOY

2023

Journal of Computational Design

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Modeling, Simulation and Characterization of Complex Shaped Solid Propellant Combustion

Wurster

2017

Propellants Explo Pyrotec

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A model to simulate propellant combustion in a closed bomb and a method for burn rate measurement are presented. The model incorporates the 2D ICT‐Cellular‐Combustion‐Algorithm which numerically simulates the 2D form function of an arbitrary shaped propellant cross section. With the help of preprocessing algorithms to calculate initial surface and volume and a lumped parameter model, which also takes into account pressure dependent thermochemistry, pressure vs. time curves and the dynamic vivacity can be simulated. The model is then coupled with different optimization algorithms to minimize an objective function for burn rate measurement with either pressure or vivacity data. Four different optimization algorithms are compared in detail using synthetic pressure‐time and dynamic vivacity data of a 7 perforated propellant with and without white noise. The testing shows that the so called Nelder‐Mead‐Downhill‐Simplex algorithm with a vivacity based objective function allows the most precise, robust and computationally cost effective burn rate measurement. Experimental results for 7 perforated JA2 propellant from a 306 cm3 closed bomb are used to determine Vieille′s parameters α and β. The determined values of α=0,9520±0,006319 and β=0,1522±0,007592 mm/s are in good agreement with previously reported values of α=0.9517 and β=0.1467 mm/s. With the presented model and burn rate measurement method it is possible to determine the burning rates of solid propellants with a high degree of accuracy.

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