Theory of Technical Systems - Educational Tool for Engineering

Eder, W. Ernst

doi:10.13189/ujer.2016.040617

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…The principles of design, manufacture, and modelling of mechanical systems [17][18][19] were analysed to comply with the permissible noise limits (MIL-STD-1474E) 20 . During the establishment of the work methodology, the main component from which the design should start is the human being [21][22][23] . During the study of the Carl L. patent 24 , adaptations and designs of exclusive tooling were identified and would be required to facilitate the machining process 25 .…”

Section: Methodsmentioning

confidence: 99%

Numerical and Experimental Analysis of Sound Suppressor for a 5.56 mm Calibre

Huerta-Torres

Silva-Rivera²,

Herrera

et al. 2021

Def. Sc. J.

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A sound suppressor is an internal or external device coupled to the barrel of a firearm. Its development has been historically related to the negative effects produced by the noise. This article presents the numerical and experimental analysis of a sound suppressor for a 5.56 mm caliber rifle. It was designed, manufactured, and tested inside a shooting tunnel for 911 m/s and 344 m/s velocities. Three geometric configurations with curved deflectors, conical deflectors, and finally with a reactive spiral capable of dissipating the acoustic wave were compared considering reactive and dissipative systems. The attenuation of the sound inside the silencer depends directly on the reduction of the projectile wave velocity and the deflagration of the gases at the instant of firing. Then the MIL-STD-1474E standard was used to carry out the experiments. The results in the computational numerical simulation show an average value of 143 dB for the considered three models, the Sound Pressure Level in the reactive core model decreased by 25% with respect to other proposals, which have an average value of 141 dB. These results can be useful to improve in the design of sound suppressors based on the needs of the users and under the specific characteristics of each weapon ballistic.

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Section: Methodsmentioning

confidence: 99%

Numerical and Experimental Analysis of Sound Suppressor for a 5.56 mm Calibre

Huerta-Torres

Silva-Rivera²,

Herrera

et al. 2021

Def. Sc. J.

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“…In the recent years, a qualitatively new direction of the mechanical engineering science has been formed, which consists in the development of scientific foundations for planning technological processes of machining parts with the most effective operational properties [1][2][3]. Creation and implementation of scientific and applied principles of the functional-oriented technologies planning for the integrated increase of operational quality of machine-building products is the topical engineering task.…”

Section: Literature Reviewmentioning

confidence: 99%

Archive of Mechanical Engineering

Stupnytskyy,

Hrytsay

2020

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Product Lifecycle Management (PLM) system requires consideration and ensuring efficient operating conditions for the most loaded parts in the product, not only at the product's design stage, but also at the production stage. Operational properties of the product can be significantly improved if we take into consideration the formation of the functional surfaces wear resistance parameters already at the planning stage of the technological process structure and parameters of the product's machining. The method of constructing predictive models of the influence of the technological process structure on the formation of a complex of product's operational properties is described in the article. The relative index of operational wear resistance of the machined surface, which is characterized by the use of different variants of the structure and parameters of this surface treatment, depends on the microtopographic state of the surface layer and the presence of cutting-induced residual stress. On the example of the eject pin machining it has been shown how the change in the structure of the manufacturing process from grinding to the turning by tool with the tungsten carbide insert affects the predicted wear resistance of the machined functional surface.

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“…As a result, this representation not only applies to describing existing technical systems, but also provides a foundation for developing theories in the field of design science [9][10][11]. From this point of view this theory needs to be presented for future engineers for the effective application of in practice its basics concepts [12,13].…”

Section: Introductionmentioning

confidence: 99%

Application of System Analysis for Technological Processes Investigation

Polyakova

Shiriaeva

Iansaitova

2020

KEM

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System analysis is used as the effective way for design and modification of different kinds of technical systems. Application of system analysis to any technological process allows to present the links between input and output parameters which makes it possible to analyze its effectiveness and effect on the process for manufacturing of the object with necessary level of quality. The paper presents results of system analysis application for multioperational technological processes. The main aim of hot rolling process is manufacturing the hot rolled metal sheet with definite geometrical parameters which are necessary for further cold rolling process. The scheme of hot rolling operation with its input and output links is presented. The obtained results can be used for mathematical modeling of hot rolling operation. It is shown the application of system analysis for technological process of coating on the example of vacuum ion-plasma coating process. Because of existence of operated, noncontrolled, and indignant parameters of the coating process application of system analysis is the effective way for structural analysis of this technical system. It is proposed to supplement system analysis with function-oriented analysis. This approach can state the links between properties of the object which are sufficient for its application and technological parameters of the manufacturing technological process.

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Theory of Technical Systems - Educational Tool for Engineering

Cited by 4 publications

References 19 publications

Numerical and Experimental Analysis of Sound Suppressor for a 5.56 mm Calibre

Numerical and Experimental Analysis of Sound Suppressor for a 5.56 mm Calibre

Archive of Mechanical Engineering

Application of System Analysis for Technological Processes Investigation

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