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Guoqing Yang^*, Jialu Chen
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, DOI:10.32604/rimni.2024.056332
Abstract Urban underground public spaces are relatively enclosed, with high daily passenger flow and diverse directions. Enhancing evacuation capabilities through dynamic guidance systems is a crucial solution. Therefore, this paper proposes a double-layer computational framework based on meta-heuristic integration of a bi-objective evacuation path optimization method. Firstly, the outer layer computation explores the population by combining the genetic algorithm and simulated annealing. It uses temperature parameters to probabilistically accept worse solutions, enhancing global search capability and avoiding local optima. Secondly, the inner layer calculates the fitness value of each solution from the outer layer, considering both… More >

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Shuang Liu^1,*, Zhiyin Guo^2,3, Lihai Chen⁴
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, DOI:10.32604/rimni.2024.056526
Abstract One significant technical measure to reduce the forward radar cross section (RCS) of the aircraft was to design the inlet into an S-shape. Additionally, the application of radar-absorbing material (RAM) can further decrease the RCS of the air intake which approach enhances the stealth capabilities of the aircraft. Nevertheless, the use of RAM will simultaneously increase the inherent weight of the air intake. The electromagnetic scattering characteristics of S-shaped inlets without RAM coating and seven coating schemes are calculated by numerical simulation. The risk theory was employed to assess the impact of the coating RAM More >

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Jose Rosas-Cordova¹, Carlos Santana-Delgado^1,*, Diana Hernandez-Alcantara², Luis Amezquita-Brooks^1,*
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, DOI:10.32604/rimni.2024.056492
Abstract Potential flow theory-based numerical solvers have gained popularity for rapid and straightforward aerodynamic modeling across various applications, particularly in the early stages of design and in resource-limited projects such as small unmanned aerial vehicles (UAVs). These solvers offer a cost-effective solution for analyzing aerodynamic performance, and several well-established methods have demonstrated strong alignment with experimental data. Among these solvers is VSPAERO, a relatively recent addition integrated within the National Aeronautics and Space Administration’s (NASA) OpenVSP aircraft design software. Despite its growing use, a comprehensive validation of the VSPAERO solver remains necessary to ensure its reliability… More >

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