9 research outputs found

    Detection of the botnets’ low-rate DDoS attacks based on self-similarity

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    An article presents the approach for the botnets’ low-rate a DDoS-attacks detection based on the botnet’s behavior in the network. Detection process involves the analysis of the network traffic, generated by the botnets’ low-rate DDoS attack. Proposed technique is the part of botnets detection system – BotGRABBER system. The novelty of the paper is that the low-rate DDoS-attacks detection involves not only the network features, inherent to the botnets, but also network traffic self-similarity analysis, which is defined with the use of Hurst coefficient. Detection process consists of the knowledge formation based on the features that may indicate low-rate DDoS attack performed by a botnet; network monitoring, which analyzes information obtained from the network and making conclusion about possible DDoS attack in the network; and the appliance of the security scenario for the corporate area network’s infrastructure in the situation of low-rate attacks

    Π ΠΎΠ·Ρ€ΠΎΠ±ΠΊΠ° ΠΌΠ΅Ρ‚ΠΎΠ΄Ρƒ Ρ–Π½Ρ‚Π΅Ρ€Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΡ— ΠΊΠΎΠΌΠΏΠΎΠ½ΠΎΠ²ΠΊΠΈ структурних Π΅Π»Π΅ΠΌΠ΅Π½Ρ‚Ρ–Π² ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ Ρ‡ΠΎΠ»ΠΎΠ²Ρ–Ρ‡ΠΎΠ³ΠΎ ΠΏΡ–Π΄ΠΆΠ°ΠΊΠ°

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    This paper has established that one of the directions to correct a designer’s idea is the close relationship between the metric characteristics of a model and the dynamics of updating the shape structure. The need to convolute information about model varieties of a men’s jacket is due to the cyclical nature of fashion. Regression analysis of this study’s results has confirmed the impact of the accumulation of quantitative changes in style attributes on the transition to qualitative changes in shape over 15 years. The periodic repeatability of the five-seam design of a men’s jacket as a typical representative indicates the possibility of using clusters of standard elements. Correlation analysis of the update of mobile attributes (an increase along the waistline and the lapel width) confirms a high level of connection with the silhouette characteristic. Information and analytical material for encoding classification features of the functional components of model designs for an industrial product range collection has been formed. A variant for convoluting the sets of classification features in the process of sampling sorting relative to the basic list of functional nodes has been proposed. The 24Γ—24 compatibility matrix built makes it possible to apply the morphological box method to compare sample sets. The presence of uniformity of the average value of accumulated frequencies Kc.u.=0.72, Kt.u.=0.69 confirms the membership of the sample in the typological series. Having a common encoding system simplifies the selection of models from the internet-based product range collections. The method of sorting the models-proposals of the resulting layout set has been confirmed by the validity coefficient Kv=0.71, which makes it possible to verify the perception of a jacket design as a typical representative of modern structure. Practical recommendations have been compiled on grouping the records of industrial product range collection model codes into industrial series, which enable control over the launch of articles within the manufacturing process.Одним ΠΈΠ· Π½Π°ΠΏΡ€Π°Π²Π»Π΅Π½ΠΈΠΉ ΠΊΠΎΡ€Ρ€Π΅ΠΊΡ‚ΠΈΡ€ΠΎΠ²ΠΊΠΈ дизайнСрской ΠΈΠ΄Π΅ΠΈ ΠΎΠΏΡ€Π΅Π΄Π΅Π»Π΅Π½ΠΎ тСсноту связи мСтричСских характСристик ΠΌΠΎΠ΄Π΅Π»ΠΈ с Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΎΠΉ обновлСния структуры Ρ„ΠΎΡ€ΠΌΡ‹. ΠΠ΅ΠΎΠ±Ρ…ΠΎΠ΄ΠΈΠΌΠΎΡΡ‚ΡŒ свСртывания ΠΈΠ½Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΠΈ ΠΌΠΎΠ΄Π΅Π»ΡŒΠ½Ρ‹Ρ… Π²ΠΈΠ΄ΠΎΠ² муТского ΠΏΠΈΠ΄ΠΆΠ°ΠΊΠ° обусловлСна цикличСским ΠΏΠΎΠ²Ρ‚ΠΎΡ€Π΅Π½ΠΈΠ΅ΠΌ ΠΌΠΎΠ΄Ρ‹. РСгрСссионным Π°Π½Π°Π»ΠΈΠ·ΠΎΠΌ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠ² исслСдования Π΄ΠΎΠΊΠ°Π·Π°Π½ΠΎ влияниС накоплСния количСствСнных ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΉ стилСвых ΠΏΡ€ΠΈΠ·Π½Π°ΠΊΠΎΠ² Π½Π° ΠΏΠ΅Ρ€Π΅Ρ…ΠΎΠ΄ Π² качСствСнныС измСнСния Ρ„ΠΎΡ€ΠΌΡ‹ Π² Ρ‚Π΅Ρ‡Π΅Π½ΠΈΠ΅ 15 Π»Π΅Ρ‚. ΠŸΠ΅Ρ€ΠΈΠΎΠ΄ΠΈΡ‡Π΅ΡΠΊΠ°Ρ ΠΏΠΎΠ²Ρ‚ΠΎΡ€ΡΠ΅ΠΌΠΎΡΡ‚ΡŒ ΠΏΡΡ‚ΠΈΡˆΠΎΠ²Π½ΠΎΠΉ конструкции муТского ΠΏΠΈΠ΄ΠΆΠ°ΠΊΠ° ΠΊΠ°ΠΊ Ρ‚ΠΈΠΏΠΈΡ‡Π½ΠΎΠ³ΠΎ прСдставитСля ΡΠ²ΠΈΠ΄Π΅Ρ‚Π΅Π»ΡŒΡΡ‚Π²ΡƒΠ΅Ρ‚ ΠΎ возмоТности примСнСния кластСров Ρ‚ΠΈΠΏΠΎΠ²Ρ‹Ρ… элСмСнтов. ΠšΠΎΡ€Ρ€Π΅Π»ΡΡ†ΠΈΠΎΠ½Π½Ρ‹ΠΉ Π°Π½Π°Π»ΠΈΠ· обновлСния ΠΌΠΎΠ±ΠΈΠ»ΡŒΠ½Ρ‹Ρ… ΠΏΡ€ΠΈΠ·Π½Π°ΠΊΠΎΠ² (ΠΏΡ€ΠΈΠ±Π°Π²ΠΊΠ° ΠΏΠΎ Π»ΠΈΠ½ΠΈΠΈ Ρ‚Π°Π»ΠΈΠΈ ΠΈ ΡˆΠΈΡ€ΠΈΠ½Π° Π»Π°Ρ†ΠΊΠ°Π½Π°) ΠΏΠΎΠ΄Ρ‚Π²Π΅Ρ€ΠΆΠ΄Π°Π΅Ρ‚ высокий ΡƒΡ€ΠΎΠ²Π΅Π½ΡŒ связи с силуэтной характСристикой. Π‘Ρ„ΠΎΡ€ΠΌΠΈΡ€ΠΎΠ²Π°Π½ ΠΈΠ½Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΠΎΠ½Π½ΠΎ-аналитичСский ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π» кодирования классификационных ΠΏΡ€ΠΈΠ·Π½Π°ΠΊΠΎΠ² Ρ„ΡƒΠ½ΠΊΡ†ΠΈΠΎΠ½Π°Π»ΡŒΠ½Ρ‹Ρ… ΡƒΠ·Π»ΠΎΠ² ΠΌΠΎΠ΄Π΅Π»ΡŒΠ½Ρ‹Ρ… конструкций ΠΏΡ€ΠΎΠΌΡ‹ΡˆΠ»Π΅Π½Π½ΠΎΠΉ ΠΊΠΎΠ»Π»Π΅ΠΊΡ†ΠΈΠΈ. ΠŸΡ€Π΅Π΄Π»ΠΎΠΆΠ΅Π½ Π²Π°Ρ€ΠΈΠ°Π½Ρ‚ свСртывания мноТСств классификационных ΠΏΡ€ΠΈΠ·Π½Π°ΠΊΠΎΠ² Π² процСссС сортировки Π²Ρ‹Π±ΠΎΡ€ΠΎΠΊ ΠΎΡ‚Π½ΠΎΡΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ Π±Π°Π·ΠΎΠ²ΠΎΠ³ΠΎ пСрСчня Ρ„ΡƒΠ½ΠΊΡ†ΠΈΠΎΠ½Π°Π»ΡŒΠ½Ρ‹Ρ… ΡƒΠ·Π»ΠΎΠ². Разработанная ΠΌΠ°Ρ‚Ρ€ΠΈΡ†Π° совмСстимости 24Γ—24 позволяСт ΠΏΡ€ΠΈΠΌΠ΅Π½ΠΈΡ‚ΡŒ ΠΌΠ΅Ρ‚ΠΎΠ΄ морфологичСского ящика для сравнСния мноТСств Π²Ρ‹Π±ΠΎΡ€ΠΎΠΊ. НаличиС однородности срСднСй Π²Π΅Π»ΠΈΡ‡ΠΈΠ½Ρ‹ Π½Π°ΠΊΠ°ΠΏΠ»ΠΈΠ²Π°Π΅ΠΌΡ‹Ρ… частот KΠΊ.ΠΎ.=0,72, KΡ‚.ΠΎ.=0,69 ΠΏΠΎΠ΄Ρ‚Π²Π΅Ρ€ΠΆΠ΄Π°Π΅Ρ‚ ΠΏΡ€ΠΈΠ½Π°Π΄Π»Π΅ΠΆΠ½ΠΎΡΡ‚ΡŒ Π²Ρ‹Π±ΠΎΡ€ΠΎΠΊ ΠΊ типологичСскому ряду. ΠžΠ±Ρ‰Π°Ρ систСма кодирования ΡƒΠΏΡ€ΠΎΡ‰Π°Π΅Ρ‚ ΠΎΡ‚Π±ΠΎΡ€ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΈΠ· ΠΊΠΎΠ»Π»Π΅ΠΊΡ†ΠΈΠΉ Π² ΠΈΠ½Ρ‚Π΅Ρ€Π½Π΅Ρ‚-рСсурсах. ΠœΠ΅Ρ‚ΠΎΠ΄ сортирования ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ-ΠΏΡ€Π΅Π΄Π»ΠΎΠΆΠ΅Π½ΠΈΠΉ ΠΊΠΎΠ½Π΅Ρ‡Π½ΠΎΠ³ΠΎ мноТСства ΠΊΠΎΠΌΠΏΠΎΠ½ΠΎΠ²ΠΊΠΈ ΠΏΠΎΠ΄Ρ‚Π²Π΅Ρ€ΠΆΠ΄Π΅Π½ΠΎ коэффициСнтом валидности KΠ²=0,71, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹ΠΉ позволяСт Π²Π΅Ρ€ΠΈΡ„ΠΈΡ†ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ восприятиС ΠΎΠ±Ρ€Π°Π·Π° ΠΏΠΈΠ΄ΠΆΠ°ΠΊΠ°, ΠΊΠ°ΠΊ Ρ‚ΠΈΠΏΠΈΡ‡Π½ΠΎΠ³ΠΎ прСдставитСля соврСмСнной конструкции. Π‘Ρ„ΠΎΡ€ΠΌΡƒΠ»ΠΈΡ€ΠΎΠ²Π°Π½Ρ‹ практичСскиС Ρ€Π΅ΠΊΠΎΠΌΠ΅Π½Π΄Π°Ρ†ΠΈΠΈ ΠΏΠΎ Π³Ρ€ΡƒΠΏΠΏΠΈΡ€ΠΎΠ²ΠΊΠ΅ записСй ΠΊΠΎΠ΄ΠΎΠ² ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΏΡ€ΠΎΠΌΡ‹ΡˆΠ»Π΅Π½Π½ΠΎΠΉ ΠΊΠΎΠ»Π»Π΅ΠΊΡ†ΠΈΠΈ Π² ΠΏΡ€ΠΎΠΌΡ‹ΡˆΠ»Π΅Π½Π½Ρ‹Π΅ сСрии, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ ΠΎΠ±Π΅ΡΠΏΠ΅Ρ‡ΠΈΠ²Π°ΡŽΡ‚ ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»ΡŒ запуска ΠΈΠ·Π΄Π΅Π»ΠΈΠΉ Π² тСхнологичСский ΠΏΡ€ΠΎΡ†Π΅ΡΡΠžΠ΄Π½ΠΈΠΌ Ρ–Π· напрямків корСгування Π΄ΠΈΠ·Π°ΠΉΠ½Π΅Ρ€ΡΡŒΠΊΠΎΡ— Ρ–Π΄Π΅Ρ— Π²ΠΈΠ·Π½Π°Ρ‡Π΅Π½ΠΎ тісноту зв’язку ΠΌΠ΅Ρ‚Ρ€ΠΈΡ‡Π½ΠΈΡ… характСристик ΠΌΠΎΠ΄Π΅Π»Ρ– Π· Π΄ΠΈΠ½Π°ΠΌΡ–ΠΊΠΎΡŽ оновлСння структури Ρ„ΠΎΡ€ΠΌΠΈ. ΠΠ΅ΠΎΠ±Ρ…Ρ–Π΄Π½Ρ–ΡΡ‚ΡŒ згортання Ρ–Π½Ρ„ΠΎΡ€ΠΌΠ°Ρ†Ρ–Ρ— ΠΌΠΎΠ΄Π΅Π»ΡŒΠ½ΠΈΡ… Ρ€Ρ–Π·Π½ΠΎΠ²ΠΈΠ΄Ρ–Π² Ρ‡ΠΎΠ»ΠΎΠ²Ρ–Ρ‡ΠΎΠ³ΠΎ ΠΏΡ–Π΄ΠΆΠ°ΠΊΠ° ΠΎΠ±ΡƒΠΌΠΎΠ²Π»Π΅Π½Π° Ρ†ΠΈΠΊΠ»Ρ–Ρ‡Π½ΠΈΠΌ повторСнням ΠΌΠΎΠ΄ΠΈ. РСгрСсійним Π°Π½Π°Π»Ρ–Π·ΠΎΠΌ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ–Π² дослідТСння Π΄ΠΎΠ²Π΅Π΄Π΅Π½ΠΎ Π²ΠΏΠ»ΠΈΠ² накопичСння ΠΊΡ–Π»ΡŒΠΊΡ–ΡΠ½ΠΈΡ… Π·ΠΌΡ–Π½ ΡΡ‚ΠΈΠ»ΡŒΠΎΠ²ΠΈΡ… ΠΎΠ·Π½Π°ΠΊ Π½Π° ΠΏΠ΅Ρ€Π΅Ρ…Ρ–Π΄ Π² якісні Π·ΠΌΡ–Π½ΠΈ Ρ„ΠΎΡ€ΠΌΠΈ Π½Π° протязі 15 Ρ€ΠΎΠΊΡ–Π². ΠŸΠ΅Ρ€Ρ–ΠΎΠ΄ΠΈΡ‡Π½Π° ΠΏΠΎΠ²Ρ‚ΠΎΡ€ΡŽΠ²Π°Π½Ρ–ΡΡ‚ΡŒ ΠΏβ€™ΡΡ‚ΠΈΡˆΠΎΠ²Π½ΠΎΡ— конструкції Ρ‡ΠΎΠ»ΠΎΠ²Ρ–Ρ‡ΠΎΠ³ΠΎ ΠΏΡ–Π΄ΠΆΠ°ΠΊΠ° Π² якості Ρ‚ΠΈΠΏΠΎΠ²ΠΎΠ³ΠΎ прСдставника ΡΠ²Ρ–Π΄Ρ‡ΠΈΡ‚ΡŒ ΠΏΡ€ΠΎ ΠΌΠΎΠΆΠ»ΠΈΠ²Ρ–ΡΡ‚ΡŒ застосування кластСрів Ρ‚ΠΈΠΏΠΎΠ²ΠΈΡ… Π΅Π»Π΅ΠΌΠ΅Π½Ρ‚Ρ–Π². ΠšΠΎΡ€Π΅Π»ΡΡ†Ρ–ΠΉΠ½ΠΈΠΉ Π°Π½Π°Π»Ρ–Π· оновлСння ΠΌΠΎΠ±Ρ–Π»ΡŒΠ½ΠΈΡ… ΠΎΠ·Π½Π°ΠΊ (ΠΏΡ€ΠΈΠ±Π°Π²ΠΊΠ° ΠΏΠΎ Π»Ρ–Π½Ρ–Ρ— Ρ‚Π°Π»Ρ–Ρ— Ρ– ΡˆΠΈΡ€ΠΈΠ½Π° Π»Π°Ρ†ΠΊΠ°Π½Π°) ΠΏΡ–Π΄Ρ‚Π²Π΅Ρ€Π΄ΠΆΡƒΡ” високий Ρ€Ρ–Π²Π΅Π½ΡŒ зв’язку Π· ΡΠΈΠ»ΡƒΠ΅Ρ‚Π½ΠΎΡŽ Ρ…Π°Ρ€Π°ΠΊΡ‚Π΅Ρ€ΠΈΡΡ‚ΠΈΠΊΠΎΡŽ. Π‘Ρ„ΠΎΡ€ΠΌΠΎΠ²Π°Π½ΠΎ Ρ–Π½Ρ„ΠΎΡ€ΠΌΠ°Ρ†Ρ–ΠΉΠ½ΠΎ-Π°Π½Π°Π»Ρ–Ρ‚ΠΈΡ‡Π½ΠΈΠΉ ΠΌΠ°Ρ‚Π΅Ρ€Ρ–Π°Π» кодування класифікаційних ΠΎΠ·Π½Π°ΠΊ Ρ„ΡƒΠ½ΠΊΡ†Ρ–ΠΎΠ½Π°Π»ΡŒΠ½ΠΈΡ… Π²ΡƒΠ·Π»Ρ–Π² ΠΌΠΎΠ΄Π΅Π»ΡŒΠ½ΠΈΡ… конструкцій промислової ΠΊΠΎΠ»Π΅ΠΊΡ†Ρ–Ρ—. Π—Π°ΠΏΡ€ΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΎ Π²Π°Ρ€Ρ–Π°Π½Ρ‚ згортання ΠΌΠ½ΠΎΠΆΠΈΠ½ класифікаційних ΠΎΠ·Π½Π°ΠΊ Π² процСсі сортування Π²ΠΈΠ±Ρ–Ρ€ΠΎΠΊ відносно Π±Π°Π·ΠΎΠ²ΠΎΠ³ΠΎ ΠΏΠ΅Ρ€Π΅Π»Ρ–ΠΊΡƒ Ρ„ΡƒΠ½ΠΊΡ†Ρ–ΠΎΠ½Π°Π»ΡŒΠ½ΠΈΡ… Π²ΡƒΠ·Π»Ρ–Π². Π ΠΎΠ·Ρ€ΠΎΠ±Π»Π΅Π½Π° матриця сумісності 24Γ—24 дозволяє застосувати ΠΌΠ΅Ρ‚ΠΎΠ΄ ΠΌΠΎΡ€Ρ„ΠΎΠ»ΠΎΠ³Ρ–Ρ‡Π½ΠΎΡ— ΡΠΊΡ€ΠΈΠ½ΡŒΠΊΠΈ для порівняння ΠΌΠ½ΠΎΠΆΠΈΠ½ Π²ΠΈΠ±Ρ–Ρ€ΠΎΠΊ. ΠΠ°ΡΠ²Π½Ρ–ΡΡ‚ΡŒ однорідності ΡΠ΅Ρ€Π΅Π΄Π½ΡŒΠΎΡ— Π²Π΅Π»ΠΈΡ‡ΠΈΠ½ΠΈ Π½Π°ΠΊΠΎΠΏΠΈΡ‡ΡƒΠ²Π°Π½ΠΈΡ… частот KΠΊ.ΠΎ.=0,72, KΡ‚.ΠΎ.=0,69 ΠΏΡ–Π΄Ρ‚Π²Π΅Ρ€Π΄ΠΆΡƒΡ” Π½Π°Π»Π΅ΠΆΠ½Ρ–ΡΡ‚ΡŒ Π²ΠΈΠ±Ρ–Ρ€ΠΎΠΊ Π΄ΠΎ Ρ‚ΠΈΠΏΠΎΠ»ΠΎΠ³Ρ–Ρ‡Π½ΠΎΠ³ΠΎ ряду. ΠΠ°ΡΠ²Π½Ρ–ΡΡ‚ΡŒ ΡΠΏΡ–Π»ΡŒΠ½ΠΎΡ— систСми кодування спрощує Π²Ρ–Π΄Π±Ρ–Ρ€ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ Π· ΠΊΠΎΠ»Π΅ΠΊΡ†Ρ–ΠΉ Ρ–Π½Ρ‚Π΅Ρ€Π½Π΅Ρ‚-рСсурсів. ΠœΠ΅Ρ‚ΠΎΠ΄ сортування ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ-ΠΏΡ€ΠΎΠΏΠΎΠ·ΠΈΡ†Ρ–ΠΉ ΠΊΡ–Π½Ρ†Π΅Π²ΠΎΡ— ΠΌΠ½ΠΎΠΆΠΈΠ½ΠΈ ΠΊΠΎΠΌΠΏΠΎΠ½ΠΎΠ²ΠΊΠΈ ΠΏΡ–Π΄Ρ‚Π²Π΅Ρ€Π΄ΠΆΠ΅Π½ΠΎ ΠΊΠΎΠ΅Ρ„Ρ–Ρ†Ρ–Ρ”Π½Ρ‚ΠΎΠΌ валідності KΠ²=0,71, який дозволяє Π²Π΅Ρ€ΠΈΡ„Ρ–ΠΊΡƒΠ²Π°Ρ‚ΠΈ сприйняття ΠΎΠ±Ρ€Π°Π·Ρƒ ΠΏΡ–Π΄ΠΆΠ°ΠΊΠ° як Ρ‚ΠΈΠΏΠΎΠ²ΠΎΠ³ΠΎ прСдставника сучасної конструкції. Π‘Ρ„ΠΎΡ€ΠΌΡƒΠ»ΡŒΠΎΠ²Π°Π½Ρ– ΠΏΡ€Π°ΠΊΡ‚ΠΈΡ‡Π½Ρ– Ρ€Π΅ΠΊΠΎΠΌΠ΅Π½Π΄Π°Ρ†Ρ–Ρ— Ρ‰ΠΎΠ΄ΠΎ групування записів ΠΊΠΎΠ΄Ρ–Π² ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ промислової ΠΊΠΎΠ»Π΅ΠΊΡ†Ρ–Ρ— Π² промислові сСрії, Ρ‰ΠΎ Π·Π°Π±Π΅Π·ΠΏΠ΅Ρ‡ΡƒΡŽΡ‚ΡŒ ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»ΡŒ запуску Π²ΠΈΡ€ΠΎΠ±Ρ–Π² Π² Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³Ρ–Ρ‡Π½ΠΈΠΉ ΠΏΡ€ΠΎΡ†Π΅

    Diagnosing of the Glass Fiber Reinforced Polymer Material High Performance Drilling Process State

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    The article presents the results of works on the analysis of using cutting forces and torque measurements to determine the state of dry fiberglass matrix polyester resin composite high performance drilling process. The research and analyzes were carried out for the different states of tool state and the process state itself. GFRP - Glass Fiber Reinforced Polymer was used to perform the experiment. As a result of the conducted analyzes, it was determined that booth the forces and torque generated in drilling process can constitute a good diagnostic signal, on the basis of which it is possible to conclude about the state of the process and tool

    Computational and experimental diagnostics of the shear properties of greases

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    The study of the properties of consistent and liquid oils is currently receiving much attention in tribology. This is because lubrication is one of the most effective ways to improve machine durability. At the same time are practically no mathematical descriptions of the mechanisms of grease lubrication, which is necessary for predicting and calculating the wear of machines. When studying the wear of surfaces under boundary lubrication conditions, it is necessary to know the stiffness characteristics of a thin layer of lubricant under normal and tangential stresses. In this paper, a method is proposed for determining the function of the contact tangential characteristics of a thin oil layer between solid deformable surfaces. A thin layer of grease is placed between two hard discs. By measuring the angle of rotation and the moment on the second disc, the dependence of the moment on the angle of rotation is determined. The contact mechanics of torsion of a thin circular lubricant layer has been developed and relations for determining the parameters of the shear diagram of a thin lubricant layer have been obtained. According to the developed method, the Fiol-3 grease was tested and the parameters of the shear diagram were determined

    Wear models and diagnostics of cylindrical sliding tribosystem

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    Reviewers: Mykhaylo Pashechko Prof. dr hab. eng, Department of Fundamental of Technology, Lublin University of Technology, Poland Andrei Ya. Grigoriev Dr. Sci. Eng., V.A. Belyi Metal-Polymer Research Institute, National Academy of Sciences of Belarus, Gomel, Belarus Audrius Zunda Assoc. Prof. Dr., Institute of Power and Transport Machinery Engineering, Vytautas Magnus University, Kaunas, LithuaniaThe current stage of development of tribology is characterized by the creation of methods for calculating friction pairs for wear. It has long been considered that the creation of such methods is impossible due to the extreme complexity of wear processes. If there are no calculation methods, respectively, there will be no methods for predicting wear resistance and durability of tribosystems. Development of analytical methods of calculation of wear resistance of tribosystems is complicated by nonlinearity of models of wear owing to difficult interrelations of mechanical, thermophysical and frictional properties. To obtain correct results, analytical methods for calculating tribosystems require proof by numerical methods using powerful computing systems. Cylindrical tribosystems of sliding in many power, technological and transport machines are one of the main elements that determines the durability and reliability of the machine as a whole. Therefore, the creation of a system of computational and experimental methods and numerical models for predicting the durability of cylindrical sliding tribosystems, taking into account the variety of operating conditions is an important scientific[...]Vytauto DidΕΎiojo universitetasΕ½emΔ—s Ε«kio akademij

    ΠžΠ±ΠΌΡ–Π½Π½Π° взаємодія Ρ– ΠΌΠΎΠ΄Π΅Π»Ρ– ΠΊΠΎΠ½Ρ‚Π°ΠΊΡ‚Π½ΠΎΡ— Π³Π΅Π½Π΅Ρ€Π°Ρ†Ρ–Ρ— Π·Π±ΡƒΡ€Π΅Π½ΡŒ Π² трибосистСмах

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    The physical mechanisms have been investigated that form and transform the corpuscular-vortex-wave thermal complexes of disturbances in contact tribosystems based on the quantum-mechanical exchange interaction. The presence of a contact gap determines the generation of pairs of quasi-particles-disturbances stabilized by wavelength and frequency. Internal instability and collapse processes in such a system of disturbances lead to the formation of defects in a tribopair's material and underlie the emergency friction regimes. This paper gives specific technical examples of the generation of thermal complexes at fretting, during the friction of sliding and rolling, and at cutting. It has been established that the destructive nature of the process of fretting at low values of reverse sliding speeds is caused by the generation and collapse of the corpuscular-vortex-wave thermal complexes. An example of acoustic friction emission in the ultrasonic region of the spectrum has been used to show the quantum nature of the disturbances generated by friction. The high-frequency spectrum of acoustic emission corresponds to the unbalanced composition of the disturbances and leads to the formation of wear particles. The exchange interaction in a tribosystem involving rolling on the plane has been considered. The results of statistical analysis of such rolling showed the existence of the effect of negative friction caused by the quantum generation of longwave disturbances. It has been demonstrated that the collapsed component of the generation of disturbances is significantly increased under the modes of materials destruction, including when cutting the materials. The corpuscular-vortex-wave mechanism of selective transfer and hydrogen wear in tribosystems has been described. It is shown that the properties of a servovite film under the mode of selective transfer are provided by the collapse processes in the system of disturbances. Similar processes at the vortex-wave transfer of hydrogen atoms in metals lead to the wear and destruction of the surface layer of frictionРассмотрСны физичСскиС ΠΌΠ΅Ρ…Π°Π½ΠΈΠ·ΠΌΡ‹ образования ΠΈ трансформации корпускулярно-Π²ΠΈΡ…Ρ€Π΅Π²ΠΎΠ»Π½ΠΎΠ²Ρ‹Ρ… тСрмокомплСксов Π²ΠΎΠ·ΠΌΡƒΡ‰Π΅Π½ΠΈΠΉ Π² ΠΊΠΎΠ½Ρ‚Π°ΠΊΡ‚Π½Ρ‹Ρ… трибосистСмах, основанныС Π½Π° ΠΊΠ²Π°Π½Ρ‚ΠΎΠ²ΠΎ-мСханичСском ΠΎΠ±ΠΌΠ΅Π½Π½ΠΎΠΌ взаимодСйствии. НаличиС ΠΊΠΎΠ½Ρ‚Π°ΠΊΡ‚Π½ΠΎΠ³ΠΎ Ρ€Π°Π·Ρ€Ρ‹Π²Π° опрСдСляСт Π³Π΅Π½Π΅Ρ€Π°Ρ†ΠΈΡŽ ΠΏΠ°Ρ€ квазичастиц-Π²ΠΎΠ·ΠΌΡƒΡ‰Π΅Π½ΠΈΠΉ, стабилизированных ΠΏΠΎ Π΄Π»ΠΈΠ½Π΅ Π²ΠΎΠ»Π½Ρ‹ ΠΈ частотС. ВнутрСнняя Π½Π΅ΡƒΡΡ‚ΠΎΠΉΡ‡ΠΈΠ²ΠΎΡΡ‚ΡŒ ΠΈ коллапсныС процСссы Π² Ρ‚Π°ΠΊΠΎΠΉ систСмС Π²ΠΎΠ·ΠΌΡƒΡ‰Π΅Π½ΠΈΠΉ Π²Π΅Π΄ΡƒΡ‚ ΠΊ дСфСктообразования Π² ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Π΅ Ρ‚Ρ€ΠΈΠ±ΠΎΠΏΠ°Ρ€Ρ‹ ΠΈ Π»Π΅ΠΆΠ°Ρ‚ Π² основС Π°Π²Π°Ρ€ΠΈΠΉΠ½Ρ‹Ρ… Ρ€Π΅ΠΆΠΈΠΌΠΎΠ² трСния. ΠŸΡ€ΠΈΠ²Π΅Π΄Π΅Π½Ρ‹ ΠΊΠΎΠ½ΠΊΡ€Π΅Ρ‚Π½Ρ‹Π΅ тСхничСскиС ΠΏΡ€ΠΈΠΌΠ΅Ρ€Ρ‹ Π³Π΅Π½Π΅Ρ€Π°Ρ†ΠΈΠΈ тСрмокомплСксов ΠΏΡ€ΠΈ Ρ„Ρ€Π΅Ρ‚Ρ‚ΠΈΠ½Π³Π΅, Ρ‚Ρ€Π΅Π½ΠΈΠΈ скольТСния ΠΈ качСния, Ρ€Π΅Π·Π°Π½ΠΈΠΈ. УстановлСно, Ρ‡Ρ‚ΠΎ Ρ€Π°Π·Ρ€ΡƒΡˆΠΈΡ‚Π΅Π»ΡŒΠ½Ρ‹ΠΉ Ρ…Π°Ρ€Π°ΠΊΡ‚Π΅Ρ€ процСсса Ρ„Ρ€Π΅Ρ‚Ρ‚ΠΈΠ½Π³Π° ΠΏΡ€ΠΈ Π½ΠΈΠ·ΠΊΠΈΡ… значСниях скоростСй рСвСрсивного скольТСния обусловлСн Π³Π΅Π½Π΅Ρ€Π°Ρ†ΠΈΠ΅ΠΉ ΠΈ коллапсом корпускулярно-Π²ΠΈΡ…Ρ€Π΅Π²ΠΎΠ»Π½ΠΎΠ²Ρ‹Ρ… тСрмокомплСксов. На ΠΏΡ€ΠΈΠΌΠ΅Ρ€Π΅ акустичСской эмиссии трСния Π² ΡƒΠ»ΡŒΡ‚Ρ€Π°Π·Π²ΡƒΠΊΠΎΠ²ΠΎΠΉ области спСктра ΠΏΠΎΠΊΠ°Π·Π°Π½ ΠΊΠ²Π°Π½Ρ‚ΠΎΠ²Ρ‹ΠΉ Ρ…Π°Ρ€Π°ΠΊΡ‚Π΅Ρ€ Π²ΠΎΠ·ΠΌΡƒΡ‰Π΅Π½ΠΈΠΉ, Π³Π΅Π½Π΅Ρ€ΠΈΡ€ΡƒΠ΅ΠΌΡ‹Ρ… Ρ‚Ρ€Π΅Π½ΠΈΠ΅ΠΌ. Высокочастотный спСктр акустичСской эмиссии соотвСтствуСт нСравновСсному составу Π²ΠΎΠ·ΠΌΡƒΡ‰Π΅Π½ΠΈΠΉ ΠΈ ΠΏΡ€ΠΈΠ²ΠΎΠ΄ΠΈΡ‚ ΠΊ Ρ„ΠΎΡ€ΠΌΠΈΡ€ΠΎΠ²Π°Π½ΠΈΡŽ частиц износа. РассмотрСно ΠΎΠ±ΠΌΠ΅Π½Π½ΠΎΠ΅ взаимодСйствиС Π² трибосистСмС с ΠΊΠ°Ρ‡Π΅Π½ΠΈΠ΅ΠΌ ΠΏΠΎ плоскости. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ статистичСского Π°Π½Π°Π»ΠΈΠ·Π° Ρ‚Π°ΠΊΠΎΠ³ΠΎ качСния ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ Π½Π°Π»ΠΈΡ‡ΠΈΠ΅ эффСкта ΠΎΡ‚Ρ€ΠΈΡ†Π°Ρ‚Π΅Π»ΡŒΠ½ΠΎΠ³ΠΎ трСния, Π²Ρ‹Π·Π²Π°Π½Π½ΠΎΠ³ΠΎ ΠΊΠ²Π°Π½Ρ‚ΠΎΠ²ΠΎΠΉ Π³Π΅Π½Π΅Ρ€Π°Ρ†ΠΈΠ΅ΠΉ Π΄Π»ΠΈΠ½Π½ΠΎΠ²ΠΎΠ»Π½ΠΎΠ²Ρ‹Ρ… Π²ΠΎΠ·ΠΌΡƒΡ‰Π΅Π½ΠΈΠΉ. Показано, Ρ‡Ρ‚ΠΎ коллапсная ΡΠΎΡΡ‚Π°Π²Π»ΡΡŽΡ‰Π°Ρ Π³Π΅Π½Π΅Ρ€Π°Ρ†ΠΈΠΈ Π²ΠΎΠ·ΠΌΡƒΡ‰Π΅Π½ΠΈΠΉ Π·Π½Π°Ρ‡ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ усиливаСтся Π² Ρ€Π΅ΠΆΠΈΠΌΠ°Ρ… Ρ€Π°Π·Ρ€ΡƒΡˆΠ΅Π½ΠΈΡ ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ², Π² Ρ‚ΠΎΠΌ числС ΠΏΡ€ΠΈ Ρ€Π΅Π·Π°Π½ΠΈΠΈ ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ². Описан корпускулярно-Π²ΠΈΡ…Ρ€Π΅Π²ΠΎΠ»Π½ΠΎΠ²ΠΎΠΉ ΠΌΠ΅Ρ…Π°Π½ΠΈΠ·ΠΌ ΠΈΠ·Π±ΠΈΡ€Π°Ρ‚Π΅Π»ΡŒΠ½ΠΎΠ³ΠΎ пСрСноса ΠΈ Π²ΠΎΠ΄ΠΎΡ€ΠΎΠ΄Π½ΠΎΠ³ΠΎ изнашивания Π² трибосистСмах. Показано, Ρ‡Ρ‚ΠΎ свойства сСрвовитной ΠΏΠ»Π΅Π½ΠΊΠΈ Π² Ρ€Π΅ΠΆΠΈΠΌΠ΅ ΠΈΠ·Π±ΠΈΡ€Π°Ρ‚Π΅Π»ΡŒΠ½ΠΎΠ³ΠΎ пСрСноса ΠΎΠ±Π΅ΡΠΏΠ΅Ρ‡ΠΈΠ²Π°ΡŽΡ‚ΡΡ коллапсными процСссами Π² систСмС Π²ΠΎΠ·ΠΌΡƒΡ‰Π΅Π½ΠΈΠΉ. АналогичныС процСссы ΠΏΡ€ΠΈ Π²ΠΈΡ…Ρ€Π΅Π²ΠΎΠ»Π½ΠΎΠ²ΠΎΠΌ пСрСносС Π°Ρ‚ΠΎΠΌΠΎΠ² Π²ΠΎΠ΄ΠΎΡ€ΠΎΠ΄Π° Π² ΠΌΠ΅Ρ‚Π°Π»Π»Π°Ρ… приводят ΠΊ изнашиванию ΠΈ Ρ€Π°Π·Ρ€ΡƒΡˆΠ΅Π½ΠΈΡŽ повСрхностного слоя трСнияРозглянуто Ρ„Ρ–Π·ΠΈΡ‡Π½Ρ– ΠΌΠ΅Ρ…Π°Π½Ρ–Π·ΠΌΠΈ утворСння Ρ– трансформації корпускулярно-Π²Ρ–Ρ…Ρ€Π΅Ρ…Π²ΠΈΠ»ΡŒΠΎΠ²ΠΈΡ… тСрмокомплСксів Π·Π±ΡƒΠ΄ΠΆΠ΅Π½ΡŒ Π² ΠΊΠΎΠ½Ρ‚Π°ΠΊΡ‚Π½ΠΈΡ… трибосистСмах, засновані Π½Π° ΠΊΠ²Π°Π½Ρ‚ΠΎΠ²ΠΎ-ΠΌΠ΅Ρ…Π°Π½Ρ–Ρ‡Π½Ρ–ΠΉ ΠΎΠ±ΠΌΡ–Π½Π½Ρ–ΠΉ Π²Π·Π°Ρ”ΠΌΠΎΠ΄Ρ–Ρ—. ΠΠ°ΡΠ²Π½Ρ–ΡΡ‚ΡŒ ΠΊΠΎΠ½Ρ‚Π°ΠΊΡ‚Π½ΠΎΠ³ΠΎ Ρ€ΠΎΠ·Ρ€ΠΈΠ²Ρƒ Π΄Π²ΠΎΡ… тСрмостатів Π· Ρ€Ρ–Π·Π½ΠΈΠΌΠΈ Π·Π½Π°ΠΊΠ°ΠΌΠΈ Π°Π±ΡΠΎΠ»ΡŽΡ‚Π½ΠΎΡ— Ρ‚Π΅ΠΌΠΏΠ΅Ρ€Π°Ρ‚ΡƒΡ€ΠΈ Π²ΠΈΠ·Π½Π°Ρ‡Π°Ρ” Π³Π΅Π½Π΅Ρ€Π°Ρ†Ρ–ΡŽ ΠΏΠ°Ρ€ квазічастинок-Π·Π±ΡƒΡ€Π΅Π½ΡŒ, стабілізованих ΠΏΠΎ Π΄ΠΎΠ²ΠΆΠΈΠ½Ρ– Ρ…Π²ΠΈΠ»Ρ– Ρ– частоті. Π’Π½ΡƒΡ‚Ρ€Ρ–ΡˆΠ½Ρ Π½Π΅ΡΡ‚Ρ–ΠΉΠΊΡ–ΡΡ‚ΡŒ Ρ– колапсні процСси Π² Ρ‚Π°ΠΊΡ–ΠΉ систСмі Π·Π±ΡƒΡ€Π΅Π½ΡŒ Π²Π΅Π΄ΡƒΡ‚ΡŒ Π΄ΠΎ дСфСктоутворСння Π² ΠΌΠ°Ρ‚Π΅Ρ€Ρ–Π°Π»Ρ– Ρ‚Ρ€ΠΈΠ±ΠΎΠΏΠ°Ρ€ΠΈ Ρ– Ρ” ΠΏΡ€ΠΈΡ‡ΠΈΠ½ΠΎΡŽ Π°Π²Π°Ρ€Ρ–ΠΉΠ½ΠΈΡ… Ρ€Π΅ΠΆΠΈΠΌΡ–Π² тСртя. НавСдСно ΠΊΠΎΠ½ΠΊΡ€Π΅Ρ‚Π½Ρ– Ρ‚Π΅Ρ…Π½Ρ–Ρ‡Π½Ρ– ΠΏΡ€ΠΈΠΊΠ»Π°Π΄ΠΈ Π³Π΅Π½Π΅Ρ€Π°Ρ†Ρ–Ρ— тСрмокомплСксів ΠΏΡ€ΠΈ Ρ„Ρ€Π΅Ρ‚Ρ‚ΠΈΠ½Π³Ρƒ, Ρ‚Π΅Ρ€Ρ‚Ρ– ковзання Ρ– кочСння, Ρ€Ρ–Π·Π°Π½Π½Ρ– ΠΌΠ°Ρ‚Π΅Ρ€Ρ–Π°Π»Ρ–Π². ВстановлСно, Ρ‰ΠΎ Ρ€ΡƒΠΉΠ½Ρ–Π²Π½ΠΈΠΉ Ρ…Π°Ρ€Π°ΠΊΡ‚Π΅Ρ€ процСсу Ρ„Ρ€Π΅Ρ‚Ρ‚ΠΈΠ½Π³Ρƒ ΠΏΡ€ΠΈ Π½ΠΈΠ·ΡŒΠΊΠΈΡ… значСннях ΡˆΠ²ΠΈΠ΄ΠΊΠΎΡΡ‚Π΅ΠΉ рСвСрсивного ковзання ΠΎΠ±ΡƒΠΌΠΎΠ²Π»Π΅Π½ΠΈΠΉ Π³Π΅Π½Π΅Ρ€Π°Ρ†Ρ–Ρ”ΡŽ Ρ– колапсом корпускулярно-Π²Ρ–Ρ…ΠΎΡ€Ρ…Π²ΠΈΠ»ΡŒΠΎΠ²ΠΈΡ… тСрмокомплСксів. На ΠΏΡ€ΠΈΠΊΠ»Π°Π΄Ρ– акустичної Смісії тСртя Π² ΡƒΠ»ΡŒΡ‚Ρ€Π°Π·Π²ΡƒΠΊΠΎΠ²ΠΎΡ— області спСктру ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΈΠΉ ΠΊΠ²Π°Π½Ρ‚ΠΎΠ²ΠΈΠΉ Ρ…Π°Ρ€Π°ΠΊΡ‚Π΅Ρ€ Π·Π±ΡƒΡ€Π΅Π½ΡŒ, Ρ‰ΠΎ Π³Π΅Π½Π΅Ρ€ΡƒΡŽΡ‚ΡŒΡΡ тСртям. Високочастотний спСктр акустичної Смісії Π²Ρ–Π΄ΠΏΠΎΠ²Ρ–Π΄Π°Ρ” Π½Π΅Ρ€Ρ–Π²Π½ΠΎΠ²Π°ΠΆΠ½ΠΎΠΌΡƒ складу Π·Π±ΡƒΡ€Π΅Π½ΡŒ Ρ– ΠΏΡ€ΠΈΠ·Π²ΠΎΠ΄ΠΈΡ‚ΡŒ Π΄ΠΎ формування частинок зносу. Розглянута ΠΎΠ±ΠΌΡ–Π½Π½Π° взаємодія Π² трибосистСмі Π· кочСнням Ρ‚Ρ–Π»Π° ΠΏΠΎ ΠΏΠ»ΠΎΡ‰ΠΈΠ½Ρ–. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΈ статистичного Π°Π½Π°Π»Ρ–Π·Ρƒ Ρ‚Π°ΠΊΠΎΠ³ΠΎ кочСння ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ Π½Π°ΡΠ²Π½Ρ–ΡΡ‚ΡŒ Π΅Ρ„Π΅ΠΊΡ‚Ρƒ Π²Ρ–Π΄`Ρ”ΠΌΠ½ΠΎΠ³ΠΎ тСртя внаслідок ΠΊΠ²Π°Π½Ρ‚ΠΎΠ²ΠΎΡ— Π³Π΅Π½Π΅Ρ€Π°Ρ†Ρ–Ρ— Π΄ΠΎΠ²Π³ΠΎΡ…Π²ΠΈΠ»ΡŒΠΎΠ²ΠΈΡ… Π·Π±ΡƒΡ€Π΅Π½ΡŒ. Показано, Ρ‰ΠΎ колапсна складова Π³Π΅Π½Π΅Ρ€Π°Ρ†Ρ–Ρ— Π·Π±ΡƒΡ€Π΅Π½ΡŒ Π·Π½Π°Ρ‡Π½ΠΎ ΠΏΠΎΡΠΈΠ»ΡŽΡ”Ρ‚ΡŒΡΡ Π² Ρ€Π΅ΠΆΠΈΠΌΠ°Ρ… руйнування ΠΌΠ°Ρ‚Π΅Ρ€Ρ–Π°Π»Ρ–Π², Π² Ρ‚ΠΎΠΌΡƒ числі ΠΏΡ€ΠΈ Ρ€Ρ–Π·Π°Π½Π½Ρ– ΠΌΠ°Ρ‚Π΅Ρ€Ρ–Π°Π»Ρ–Π². Описано корпускулярно-Π²Ρ–Ρ…ΠΎΡ€Ρ…Π²ΠΈΠ»ΡŒΠΎΠ²ΠΈΠΉ ΠΌΠ΅Ρ…Π°Π½Ρ–Π·ΠΌ Π²ΠΈΠ±Ρ–Ρ€ΠΊΠΎΠ²ΠΎΠ³ΠΎ пСрСнСсСння Ρ– Π²ΠΎΠ΄Π½Π΅Π²ΠΎΠ³ΠΎ Π·Π½ΠΎΡˆΡƒΠ²Π°Π½Π½Ρ Π² трибосистСмах. Показано, Ρ‰ΠΎ властивості сСрвовітної ΠΏΠ»Ρ–Π²ΠΊΠΈ Π² Ρ€Π΅ΠΆΠΈΠΌΡ– Π²ΠΈΠ±Ρ–Ρ€ΠΊΠΎΠ²ΠΎΠ³ΠΎ пСрСнСсСння Π·Π°Π±Π΅Π·ΠΏΠ΅Ρ‡ΡƒΡŽΡ‚ΡŒΡΡ колапсними процСсами Π² систСмі Π·Π±ΡƒΡ€Π΅Π½ΡŒ. Аналогічні процСси ΠΏΡ€ΠΈ Π²Ρ–Ρ…Ρ€Π΅Ρ…Π²ΠΈΠ»ΡŒΠΎΠ²ΠΎΠΌΡƒ пСрСнСсСнні Π°Ρ‚ΠΎΠΌΡ–Π² водню Π² ΠΌΠ΅Ρ‚Π°Π»Π°Ρ… ΠΏΡ€ΠΈΠ·Π²ΠΎΠ΄ΡΡ‚ΡŒ Π΄ΠΎ Π·Π½ΠΎΡˆΡƒΠ²Π°Π½Π½Ρ Ρ– руйнування ΠΏΠΎΠ²Π΅Ρ€Ρ…Π½Π΅Π²ΠΎΠ³ΠΎ ΡˆΠ°Ρ€Ρƒ Ρ‚Π΅Ρ€Ρ‚

    Simulation of the TATA 079 suburban bus rollover tests in accordance with UN/ECE Regulation No. 66

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    This work is a logical continuation of studies presented in the author’s previous publications [1,2,3] on establishing the analytical application features of the developed methodology for simulating natural tests in accordance with UN/ECE Regulation No. 66. [4], as well as evaluating the identity between calculated and experimental results of checking the reserve of cabin space. The relevance of the proposed methodology is primarily related to the need to comply with the requirements of the current Regulation regarding the level of passive safety of passengers in the cabin during the certification of buses: a real-life approach to testing is conducted with a series of crash tests, which lead to the inevitable destruction of the bus body frame. We would like to remind that the specific weight of the body cost in the total cost of the bus, depending on its type, can reach up to 50% of its price, which leads to exorbitant costs during the certification of road prototypes before the start of their commercial operation

    Exchange Interaction and Models of Contact Generation of Disturbances in Tribosystems

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    The physical mechanisms have been investigated that form and transform the corpuscular-vortex-wave thermal complexes of disturbances in contact tribosystems based on the quantum-mechanical exchange interaction. The presence of a contact gap determines the generation of pairs of quasi-particles-disturbances stabilized by wavelength and frequency. Internal instability and collapse processes in such a system of disturbances lead to the formation of defects in a tribopair's material and underlie the emergency friction regimes. This paper gives specific technical examples of the generation of thermal complexes at fretting, during the friction of sliding and rolling, and at cutting. It has been established that the destructive nature of the process of fretting at low values of reverse sliding speeds is caused by the generation and collapse of the corpuscular-vortex-wave thermal complexes. An example of acoustic friction emission in the ultrasonic region of the spectrum has been used to show the quantum nature of the disturbances generated by friction. The high-frequency spectrum of acoustic emission corresponds to the unbalanced composition of the disturbances and leads to the formation of wear particles. The exchange interaction in a tribosystem involving rolling on the plane has been considered. The results of statistical analysis of such rolling showed the existence of the effect of negative friction caused by the quantum generation of longwave disturbances. It has been demonstrated that the collapsed component of the generation of disturbances is significantly increased under the modes of materials destruction, including when cutting the materials. The corpuscular-vortex-wave mechanism of selective transfer and hydrogen wear in tribosystems has been described. It is shown that the properties of a servovite film under the mode of selective transfer are provided by the collapse processes in the system of disturbances. Similar processes at the vortex-wave transfer of hydrogen atoms in metals lead to the wear and destruction of the surface layer of frictio

    Devising A Method for the Interactive Arrangement of Structural Elements of Men's Jacket Models

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    This paper has established that one of the directions to correct a designer's idea is the close relationship between the metric characteristics of a model and the dynamics of updating the shape structure. The need to convolute information about model varieties of a men's jacket is due to the cyclical nature of Fashion. Regression analysis of this study's results has confirmed the impact of the accumulation of quantitative changes in style attributes on the transition to qualitative changes in shape over 15 years. The periodic repeatability of the five-seam design of a men's jacket as a typical representative indicates the possibility of using clusters of standard elements. Correlation analysis of the update of mobile attributes (an increase along the waistline and the lapel width) confirms a high level of connection with the silhouette characteristic. Information and analytical material for encoding classification features of the functional components of model designs for an industrial product range collection has been formed. A variant for convoluting the sets of classification features in the process of sampling sorting relative to the basic list of functional nodes has been proposed. The 24Γ—24 compatibility matrix built makes it possible to apply the morphological box method to compare sample sets. The presence of uniformity of the average value of accumulated frequencies Kc.u.=0.72, Kt.u.=0.69 confirms the membership of the sample in the typological series. Having a common encoding system simplifies the selection of models from the internet-based product range collections. The method of sorting the models-proposals of the resulting layout set has been confirmed by the validity coefficient Kv=0.71, which makes it possible to verify the perception of a jacket design as a typical representative of modern structure. Practical recommendations have been compiled on grouping the records of industrial product range collection model codes into industrial series, which enable control over the launch of articles within the manufacturing process
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