The Use of the Spring-Mass-Damping Model for the Analysis of Vibrations of the Mistuned Power Turbomachines Impeller

Ryzhikov, Igor

doi:10.18324/2077-5415-2020-4-20-25

Cited by 2 publications

(1 citation statement)

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“…Один поток действует на элемент изнутри, то есть обусловлен работой системы кондиционирования, второйснаружи, со стороны внешней воздушной среды. Проведение численного эксперимента планируется в автоматизированной среде специализированного программного продукта, позволяющего как воссоздать поток, так и оценить его воздействие, фиксируя значения аэродинамических параметров 4[19].…”

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3D modeling of the aircraft air conditioning system

Boev

Karpov

Raspopina

2022

jour

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The study aim was to develop a 3D model representing the aircraft air conditioning system with the purpose of performing a numerical experiment in an automated environment of engineering analysis. The completeness of this model was associated with the required result of the numerical experiment. During the experiment, we simulated conditions for the flow of aerodynamic processes in the vicinity of the louvre integrated into the fuselage skin at the point of communication between the air conditioning system and the external environment. Of particular interest was that part of the air conditioning system, which directly affects the louvre strength. The Siemens NX computer-aided design system was used to form a digital copy of the original. The toolkit of this system allows high-precision geometric models to be designed. As a result, a 3D-model was obtained applicable to simulate external and internal aerodynamical processes in the digital environment of engineering calculations for evaluating the strength parameters of the studied part. This model is a combination of geometric objects formed by a set of assembly units. In particular, such elements of the air conditioning system as the cooling turbine, radiator, and valve, are considered. In order to recreate the complex geometry of the original assembly parts of these units, an algorithm for selecting and performing typical operations of the Siemens NX system was developed and optimized for constructing correct 3D models. The constructed 3D model of the aircraft air conditioning system can be used when simulating external and internal aerodynamical processes affecting the louvre strength in the digital environment of engineering calculations. The proposed model allows users to study the structure of aircraft air conditioning systems.

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3D modeling of the aircraft air conditioning system

Boev

Karpov

Raspopina

2022

jour

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Simulation of Natural Frequencies and Forced Oscillation Magnitudes of a Vertical Milling Machine

Grigorenko

Duyun

2023

Bulletin of Belgorod State Technological University Named After. V. G. Shukhov

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The article demonstrate the technique for modeling the form of natural oscillations, as well as the amplitude and mode of forced oscillations of the HAAS VF-1 vertical milling machine. As initial data, a publicly available 3D model of load-bearing elements, information on the mass and dimensions of the spindle motor are used. In preparation for the simulation, the original solid model is idealized by removing small chamfers, fillets, and small diameter holes. Movable joints with linear rolling guides and ball bearings are replaced by rigid joints, since vibration damping in these units is not considered. During the first simulation, ten natural frequencies with the largest values of the oscillation amplitude are obtained. The second simulation shows, the influence of the spindle drive layout (coaxial installation of the electric motor with the spindle through a cam clutch or connection using a toothed belt transmission) and additional devices for dissipating vibration energy (mass and structural dampers in the form of structural elements articulated through plastic bushings) is revealed by the magnitude of forced steady-state oscillations that may occur during the processing of the part.

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The Use of the Spring-Mass-Damping Model for the Analysis of Vibrations of the Mistuned Power Turbomachines Impeller

Cited by 2 publications

References 0 publications

3D modeling of the aircraft air conditioning system

3D modeling of the aircraft air conditioning system

Simulation of Natural Frequencies and Forced Oscillation Magnitudes of a Vertical Milling Machine

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