Результаты поиска по 'application software package':
Найдено статей: 12
  1. Aksenov A.A., Kashirin V.S., Timushev S.F., Shaporenko E.V.
    Development of acoustic-vortex decomposition method for car tyre noise modelling
    Computer Research and Modeling, 2023, v. 15, no. 4, pp. 979-993

    Road noise is one of the key issues in maintaining high environmental standards. At speeds between 50 and 120 km/h, tires are the main source of noise generated by a moving vehicle. It is well known that either the interaction between the tire tread and the road surface or some internal dynamic effects are responsible for tire noise and vibration. This paper discusses the application of a new method for modelling the generation and propagation of sound during tire motion, based on the application of the so-called acoustic-vortex decomposition. Currently, the application of the Lighthill equation and the aeroacoustics analogy are the main approaches used to model tire noise. The aeroacoustics analogy, in solving the problem of separating acoustic and vortex (pseudo-sound) modes of vibration, is not a mathematically rigorous formulation for deriving the source (righthand side) of the acoustic wave equation. In the development of the acoustic-vortex decomposition method, a mathematically rigorous transformation of the equations of motion of a compressible medium is performed to obtain an inhomogeneous wave equation with respect to static enthalpy pulsations with a source term that de-pends on the velocity field of the vortex mode. In this case, the near-field pressure fluctuations are the sum of acoustic fluctuations and pseudo-sound. Thus, the acoustic-vortex decomposition method allows to adequately modeling the acoustic field and the dynamic loads that generate tire vibration, providing a complete solution to the problem of modelling tire noise, which is the result of its turbulent flow with the generation of vortex sound, as well as the dynamic loads and noise emission due to tire vibration. The method is first implemented and test-ed in the FlowVision software package. The results obtained with FlowVision are compared with those obtained with the LMS Virtual.Lab Acoustics package and a number of differences in the acoustic field are highlighted.

    Keywords: acoustic-vortex decomposition, sound pressure, hydrodynamic sound source, tire.
  2. Kazymov A.I., Kotov V.M., Mineev M.A., Russakovich N.A., Yakovlev A.V.
    Using CERN cloud technologies for the further ATLAS TDAQ software development and for its application for the remote sensing data processing in the space monitoring tasks
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 683-689

    The CERN cloud technologies (the CernVM project) give a new possibility for the software developers. The participation of the JINR ATLAS TDAQ working group in the software development for distributed data acquisition and processing system (TDAQ) of the ATLAS experiment (CERN) involves the work in the condition of the dynamically developing system and its infrastructure. The CERN cloud technologies, especially CernVM, provide the most effective access as to the TDAQ software as to the third-part software used in ATLAS. The access to the Scientific Linux environment is provided by CernVM virtual machines and the access software repository — by CernVM-FS. The problem of the functioning of the TDAQ middleware in the CernVM environment was studied in this work. The CernVM usage is illustrated on three examples: the development of the packages Event Dump and Webemon, and the adaptation of the data quality auto checking system of the ATLAS TDAQ (Data Quality Monitoring Framework) for the radar data assessment.

    Keywords: Cloud technologies, virtual machines, remote sensing data processing, ATLAS TDAQ, middleware.
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