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531.
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24
I-53
Ikhsanov, Y. S.
Amino acid and vitamin composition of crataegus orientalis pall. [Текст] / Y. S. Ikhsanov, K. M. Kusainova, G. Y. Tasmagambetova, N. T. Andasova, Y. A. Litvinenko // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 149-154
ББК 24
Рубрики: chemistry
Кл.слова (ненормированные):
Crataegus -- Crataegus orientalis Pall -- amino acids -- vitamins -- SFE extraction
Аннотация: This article examines the study of the quantitative composition of amino acids and vitamins in the fruits of the species of the genus Crataegus widespread in Kazakhstan in a supercritical extract isolated and the fruits of the Crataegus orientalis Pall plant, in order to establish the possibility of using and with subsequent cultivation of the selected species.
Держатели документа:
WKU
Доп.точки доступа:
Kusainova, K. M.
Tasmagambetova, G. Y.
Andasova, N. T.
Litvinenko, Y. A.
I-53
Ikhsanov, Y. S.
Amino acid and vitamin composition of crataegus orientalis pall. [Текст] / Y. S. Ikhsanov, K. M. Kusainova, G. Y. Tasmagambetova, N. T. Andasova, Y. A. Litvinenko // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 149-154
Рубрики: chemistry
Кл.слова (ненормированные):
Crataegus -- Crataegus orientalis Pall -- amino acids -- vitamins -- SFE extraction
Аннотация: This article examines the study of the quantitative composition of amino acids and vitamins in the fruits of the species of the genus Crataegus widespread in Kazakhstan in a supercritical extract isolated and the fruits of the Crataegus orientalis Pall plant, in order to establish the possibility of using and with subsequent cultivation of the selected species.
Держатели документа:
WKU
Доп.точки доступа:
Kusainova, K. M.
Tasmagambetova, G. Y.
Andasova, N. T.
Litvinenko, Y. A.
532.
Подробнее
28.5
S68
Smailova, K. S.
Obtaining flavonoid from taraxacum Kok-saghyz rodin plant growing in Kazakhstan. [Текст] / K. S. Smailova, G.E. Azimbaeva, A. A. Bakibaev, M. S. Abdikerim // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 155-160
ББК 28.5
Рубрики: Botany
Кл.слова (ненормированные):
medicinal plants -- Taraxacum koksaghyz rodin -- biologically active substances -- flavonoids -- IR spectrum -- 13С -NMR
Аннотация: In recent years, the interest of researchers in the herbal preparation has grown significantly. Plants are sources of biologically active substances (BAS). In previous articles, the chemical composition and biologically active substances of plants endemic Taraxacum kok-saghyz Rodin growing in Kazakhstan has been studied. Among the BAS of plant origin, inulin and flavonoids occupy a special place. The article examines the release of inulin and flavonoid from the stem of Taraxacum kok-saghyz Rodin plants. In order to isolate a flavonoid, you first need to extract inulin. Due to the fact that in our plants, inulin accumulates up to 40%. Therefore, the first stage was to isolate inulin: with extractions 1:10 with distilled water for 60 minutes, and in the second stage, the further isolation of the residue was first dried, the dry residue was 1:10 with a ratio of 70% ethanol for 3 hours. The inulin yield was -5%, the melting point was 1300C. A The yield of flavanoid is 0.66%, the melting point is 1700 C, the aggregate state is acicular light brown light. The structure of the isolated flavonoid was determined on a Uviline 9100 spectro-photometer; the highest absorption was observed at a wavelength of 364 nm. Consequently, the structure of the isolated flavonoid coincides with the literature data. The maxima of the UV, IR, 13С -NMR. spectrum show that flavonol is a derivative.
Держатели документа:
WKU
Доп.точки доступа:
Azimbaeva, G.E.
Bakibaev, A.A.
Abdikerim, M.S.
S68
Smailova, K. S.
Obtaining flavonoid from taraxacum Kok-saghyz rodin plant growing in Kazakhstan. [Текст] / K. S. Smailova, G.E. Azimbaeva, A. A. Bakibaev, M. S. Abdikerim // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 155-160
Рубрики: Botany
Кл.слова (ненормированные):
medicinal plants -- Taraxacum koksaghyz rodin -- biologically active substances -- flavonoids -- IR spectrum -- 13С -NMR
Аннотация: In recent years, the interest of researchers in the herbal preparation has grown significantly. Plants are sources of biologically active substances (BAS). In previous articles, the chemical composition and biologically active substances of plants endemic Taraxacum kok-saghyz Rodin growing in Kazakhstan has been studied. Among the BAS of plant origin, inulin and flavonoids occupy a special place. The article examines the release of inulin and flavonoid from the stem of Taraxacum kok-saghyz Rodin plants. In order to isolate a flavonoid, you first need to extract inulin. Due to the fact that in our plants, inulin accumulates up to 40%. Therefore, the first stage was to isolate inulin: with extractions 1:10 with distilled water for 60 minutes, and in the second stage, the further isolation of the residue was first dried, the dry residue was 1:10 with a ratio of 70% ethanol for 3 hours. The inulin yield was -5%, the melting point was 1300C. A The yield of flavanoid is 0.66%, the melting point is 1700 C, the aggregate state is acicular light brown light. The structure of the isolated flavonoid was determined on a Uviline 9100 spectro-photometer; the highest absorption was observed at a wavelength of 364 nm. Consequently, the structure of the isolated flavonoid coincides with the literature data. The maxima of the UV, IR, 13С -NMR. spectrum show that flavonol is a derivative.
Держатели документа:
WKU
Доп.точки доступа:
Azimbaeva, G.E.
Bakibaev, A.A.
Abdikerim, M.S.
533.
Подробнее
36
A53
Anarbekova, Z. А.
The influence of yeast races on the aroma-forming substances of table wines. [Текст] / Z. А. Anarbekova, G. I. Baigazieva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 12-18
ББК 36
Рубрики: Пищевое производство
Кл.слова (ненормированные):
Wine yeast -- fermentation -- enzyme activity -- ermentation dynamics -- organic acids -- aroma-forming substances.
Аннотация: This article shows the influence of the yeast race on the fermentation dynamics of white grape must, the composition of organic acids and aroma-forming components. The races that ensure the production of high-quality wine materials are identified.
Держатели документа:
WKU
Доп.точки доступа:
Baigazieva, G.I.
A53
Anarbekova, Z. А.
The influence of yeast races on the aroma-forming substances of table wines. [Текст] / Z. А. Anarbekova, G. I. Baigazieva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 12-18
Рубрики: Пищевое производство
Кл.слова (ненормированные):
Wine yeast -- fermentation -- enzyme activity -- ermentation dynamics -- organic acids -- aroma-forming substances.
Аннотация: This article shows the influence of the yeast race on the fermentation dynamics of white grape must, the composition of organic acids and aroma-forming components. The races that ensure the production of high-quality wine materials are identified.
Держатели документа:
WKU
Доп.точки доступа:
Baigazieva, G.I.
534.
Подробнее
28.5
I-53
Ikhsanov, Y. S.
Amino acid , fatty acid and vitamin composition of rosa caninal. [Текст] / Y. S. Ikhsanov, K.M. Kusainova, G. Y. Tasmagambetova, N. T. Andasova, Y. A. Litvinenko // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 39-43
ББК 28.5
Рубрики: Botany
Кл.слова (ненормированные):
Rosa -- Rosa canina L -- Supercritical fluid extraction -- amino acid -- vitamins
Аннотация: This article examines the study of the quantitative composition of amino acids and vitamins in the fruits of the species of the genus Rosa widespread in Kazakhstan in the supercritical extract, isolated and the fruits of the Rosa canina plant, in order to establish the possibility of using and with the subsequent cultivation of the selected species.
Держатели документа:
WKU
Доп.точки доступа:
Kusainova, K.M.
Tasmagambetova, G.Y.
Andasova, N.T.
Litvinenko, Y.A.
I-53
Ikhsanov, Y. S.
Amino acid , fatty acid and vitamin composition of rosa caninal. [Текст] / Y. S. Ikhsanov, K.M. Kusainova, G. Y. Tasmagambetova, N. T. Andasova, Y. A. Litvinenko // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 39-43
Рубрики: Botany
Кл.слова (ненормированные):
Rosa -- Rosa canina L -- Supercritical fluid extraction -- amino acid -- vitamins
Аннотация: This article examines the study of the quantitative composition of amino acids and vitamins in the fruits of the species of the genus Rosa widespread in Kazakhstan in the supercritical extract, isolated and the fruits of the Rosa canina plant, in order to establish the possibility of using and with the subsequent cultivation of the selected species.
Держатели документа:
WKU
Доп.точки доступа:
Kusainova, K.M.
Tasmagambetova, G.Y.
Andasova, N.T.
Litvinenko, Y.A.
535.
Подробнее
35
J21
Jalmakhanbetova, R.I.
Calculate the standard enthalpies of combustion , formation and melting of the complex roseofungin with a-, B- and y- cyclodextrin. [Текст] / R.I. Jalmakhanbetova, Ye. M. Suleimen, B. K. Kasenov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 44-47
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
roseofungin -- cyclodextrin -- standard enthalpy of combustion -- standard enthalpy of formation -- enthalpy of melting of a complex
Аннотация: One of the most important quantities in chemical thermodynamics and thermochemistry is the enthalpy of combustion. Of the currently existing methods for calculating the heat of combustion of natural and synthetic organic compounds, the most acceptable and correct in our case was the Karash method. In this study, the standard enthalpy of combustion, the standard enthalpy of formation, and the melting enthalpy of the antibiotic roseofungin and its cyclodextrin derivatives were calculated. As a result of the study, the thermodynamic constants of the standard enthalpies of combustion, standard enthalpies of formation, and the enthalpies of melting of the above compounds were calculated, which are of interest for physicochemical modeling of processes with their participation, serve as initial information arrays for loading into fundamental thermodynamic data banks and reference books, and is also important for standardization and certification of these complexes. It should be noted that the presence of a large number of hydroxyl groups in the structures of the studied complexes allows them to be attributed to polar compounds.
Держатели документа:
WKU
Доп.точки доступа:
Suleimen, Ye.M.
Kasenov, B.K.
J21
Jalmakhanbetova, R.I.
Calculate the standard enthalpies of combustion , formation and melting of the complex roseofungin with a-, B- and y- cyclodextrin. [Текст] / R.I. Jalmakhanbetova, Ye. M. Suleimen, B. K. Kasenov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 44-47
Рубрики: chemical Technology
Кл.слова (ненормированные):
roseofungin -- cyclodextrin -- standard enthalpy of combustion -- standard enthalpy of formation -- enthalpy of melting of a complex
Аннотация: One of the most important quantities in chemical thermodynamics and thermochemistry is the enthalpy of combustion. Of the currently existing methods for calculating the heat of combustion of natural and synthetic organic compounds, the most acceptable and correct in our case was the Karash method. In this study, the standard enthalpy of combustion, the standard enthalpy of formation, and the melting enthalpy of the antibiotic roseofungin and its cyclodextrin derivatives were calculated. As a result of the study, the thermodynamic constants of the standard enthalpies of combustion, standard enthalpies of formation, and the enthalpies of melting of the above compounds were calculated, which are of interest for physicochemical modeling of processes with their participation, serve as initial information arrays for loading into fundamental thermodynamic data banks and reference books, and is also important for standardization and certification of these complexes. It should be noted that the presence of a large number of hydroxyl groups in the structures of the studied complexes allows them to be attributed to polar compounds.
Держатели документа:
WKU
Доп.точки доступа:
Suleimen, Ye.M.
Kasenov, B.K.
536.
Подробнее
24
M23
Mamyrbekova, А.
Study of kinetics of copper oxidation by electrolysis under non-stationary conditions. [Текст] / А. Mamyrbekova, А. Mamyrbekova, M. К. Kassymova, A. Zh. Aitbayeva, O. N. Chechina // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 54-59
ББК 24
Рубрики: chemistry
Кл.слова (ненормированные):
copper electro-oxidation -- copper (I) oxide -- copper (II) oxide -- unsteady electrolysis -- electrolyte -- polarisation curves
Аннотация: The nature of the anion electrolyte affects the rate of copper anodic oxidation, while the process occurs more efficiently in solutions of sulfate and sodium chloride and is accompanied by significant polarisation. Based on the study of kinetics the possibility of obtaining powders of metal oxide was shown, which further allowed to determine the parameters of the electrolysis process in non-stationary conditions in order to obtain highly dispersed materials based on copper oxides with specific physico-chemical properties.
Держатели документа:
WKU
Доп.точки доступа:
Mamyrbekova, А.
Kassymova, M.К.
Aitbayeva, A.Zh.
Chechina, O.N.
M23
Mamyrbekova, А.
Study of kinetics of copper oxidation by electrolysis under non-stationary conditions. [Текст] / А. Mamyrbekova, А. Mamyrbekova, M. К. Kassymova, A. Zh. Aitbayeva, O. N. Chechina // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 54-59
Рубрики: chemistry
Кл.слова (ненормированные):
copper electro-oxidation -- copper (I) oxide -- copper (II) oxide -- unsteady electrolysis -- electrolyte -- polarisation curves
Аннотация: The nature of the anion electrolyte affects the rate of copper anodic oxidation, while the process occurs more efficiently in solutions of sulfate and sodium chloride and is accompanied by significant polarisation. Based on the study of kinetics the possibility of obtaining powders of metal oxide was shown, which further allowed to determine the parameters of the electrolysis process in non-stationary conditions in order to obtain highly dispersed materials based on copper oxides with specific physico-chemical properties.
Держатели документа:
WKU
Доп.точки доступа:
Mamyrbekova, А.
Kassymova, M.К.
Aitbayeva, A.Zh.
Chechina, O.N.
537.
Подробнее
24
M97
Mussina, А. S.
Development of the conditions for strong thallium amalgam. [Текст] / А. S. Mussina // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 65-70
ББК 24
Рубрики: chemistry
Кл.слова (ненормированные):
thallium amalgam -- chemical preparation -- storage -- decomposition -- sulfuric acid -- water -- wash liquid
Аннотация: It has been established that lNH2SO4 solution and distilled water can be used as a protective medium for a long-term storage (30-40 days) of thallium amalgam of eutectic composition (8.6 mas.%), without sliming of its surface and an insignificant change of its concentration. An inverse dependence between the decomposition reaction rate and the ratio of the solution volume per unit of the contact surface (V:S), which corresponds to the height of the liquid layer (h) above the amalgam, is observed. At h ~ 2.5 cm and higher, the reaction rate becomes stabilized. The value of metal loss during its storage for 10-15 days does not exceed 0.5-1.0 mas.% of the initial thallium content in the amalgam. It has been shown that the rate of dissolution of thallium from amalgam is rather low, and in sulfuric acid solution it is only slightly higher than that in water with all S:V ratios. A similar picture is observed upon thallium amalgam decomposition in the same media in an open vessel; the difference consists only in a higher K value (Table 4). Thus, with S:V = 1:2.5, in an open vessel K in lNH2SO4 makes up 10,5.1011 mol/cm2.sec, and in H2O – 7.3.1011 mol/cm2.sec, whereas in a closed vessel K in lNH2SO4 makes up 1,9.1011 mol/cm2.sec, and in H2O – 1.5.1011 mol/cm2.sec. For 40 days of thallium amalgam (8.54 mas.%) storage in 1NH2SO4 the loss of thallium has been 1.3 mas.%, and in the distilled water - 1 mas.%. The quantity of the dissolved metal increases in proportion to the experiment duration, which is characteristic for a zero-order reaction, and this dependence is observed for all S:V ratios from 1:1 to 1:7. Besides, a possibility to use some saturated hydrocarbons, wherein no sliming of thallium amalgam occurs, as a protective wash liquid has been shown.
Держатели документа:
WKU
Доп.точки доступа:
Baitasheva, G.U.
Myrzakhmetova, N.О.
Tagabergenova, Zh.A.
Gorbulicheva , E.P.
M97
Mussina, А. S.
Development of the conditions for strong thallium amalgam. [Текст] / А. S. Mussina // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 65-70
Рубрики: chemistry
Кл.слова (ненормированные):
thallium amalgam -- chemical preparation -- storage -- decomposition -- sulfuric acid -- water -- wash liquid
Аннотация: It has been established that lNH2SO4 solution and distilled water can be used as a protective medium for a long-term storage (30-40 days) of thallium amalgam of eutectic composition (8.6 mas.%), without sliming of its surface and an insignificant change of its concentration. An inverse dependence between the decomposition reaction rate and the ratio of the solution volume per unit of the contact surface (V:S), which corresponds to the height of the liquid layer (h) above the amalgam, is observed. At h ~ 2.5 cm and higher, the reaction rate becomes stabilized. The value of metal loss during its storage for 10-15 days does not exceed 0.5-1.0 mas.% of the initial thallium content in the amalgam. It has been shown that the rate of dissolution of thallium from amalgam is rather low, and in sulfuric acid solution it is only slightly higher than that in water with all S:V ratios. A similar picture is observed upon thallium amalgam decomposition in the same media in an open vessel; the difference consists only in a higher K value (Table 4). Thus, with S:V = 1:2.5, in an open vessel K in lNH2SO4 makes up 10,5.1011 mol/cm2.sec, and in H2O – 7.3.1011 mol/cm2.sec, whereas in a closed vessel K in lNH2SO4 makes up 1,9.1011 mol/cm2.sec, and in H2O – 1.5.1011 mol/cm2.sec. For 40 days of thallium amalgam (8.54 mas.%) storage in 1NH2SO4 the loss of thallium has been 1.3 mas.%, and in the distilled water - 1 mas.%. The quantity of the dissolved metal increases in proportion to the experiment duration, which is characteristic for a zero-order reaction, and this dependence is observed for all S:V ratios from 1:1 to 1:7. Besides, a possibility to use some saturated hydrocarbons, wherein no sliming of thallium amalgam occurs, as a protective wash liquid has been shown.
Держатели документа:
WKU
Доп.точки доступа:
Baitasheva, G.U.
Myrzakhmetova, N.О.
Tagabergenova, Zh.A.
Gorbulicheva , E.P.
538.
Подробнее
28
N16
Naguman, P.N.
Phytoncides in the composition of common bird cherry. [Текст] / P.N. Naguman // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 70-75
ББК 28
Рубрики: Biology
Кл.слова (ненормированные):
Bird cherry -- phytoncides -- plant -- bacteria -- protozoa -- useful properties
Аннотация: The presence of tannins and essential oil in the fruit has an anti-inflammatory effect, which is used to treat inflammatory processes in the gastrointestinal tract and dysentery. The infusion of cherry fruits has a destructive effect on microorganisms. Preparations of the fruits of the common cherry have an antiseptic effect. They are used in dental practice in the treatment of inflammatory processes of the oral mucosa, paradontosis, toothache and hypovitaminosis.
Держатели документа:
WKU
Доп.точки доступа:
Zhorabek, A.A.
Amanzholova, A.S.
Kulakov, I.V.
Rakhimbaeva, A.N.
N16
Naguman, P.N.
Phytoncides in the composition of common bird cherry. [Текст] / P.N. Naguman // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 70-75
Рубрики: Biology
Кл.слова (ненормированные):
Bird cherry -- phytoncides -- plant -- bacteria -- protozoa -- useful properties
Аннотация: The presence of tannins and essential oil in the fruit has an anti-inflammatory effect, which is used to treat inflammatory processes in the gastrointestinal tract and dysentery. The infusion of cherry fruits has a destructive effect on microorganisms. Preparations of the fruits of the common cherry have an antiseptic effect. They are used in dental practice in the treatment of inflammatory processes of the oral mucosa, paradontosis, toothache and hypovitaminosis.
Держатели документа:
WKU
Доп.точки доступа:
Zhorabek, A.A.
Amanzholova, A.S.
Kulakov, I.V.
Rakhimbaeva, A.N.
539.
Подробнее
28
С 34
Сигуатова, С. К.
Разработка оптимальной технологии выделения комплекса биологически активных веществ из растений вида ORIGANUMVULGARE. [Текст] / С. К. Сигуатова, А. И. Жусупова, Г. Т. Жумалиева, Г. Е. Жусупова // Известия НАН РК. - 2021. - №4. - С. 53-60
ББК 28
Рубрики: Биология
Кл.слова (ненормированные):
растения вида Origanum vulgare -- комплекс биологически активных веществ -- микробиологическая чистота -- ультразвуковая экстракция -- мацерация -- субстанция
Аннотация: в данной статье представлены данные по установлению показателей качества растений вида Origanum vulgare (O.vulgare), произрастающих на территории Казахстана, в соответствии с нормативными требованиями Государственной Фармакопеи Республики Казахстан (ГФ РК), разработке и определению оптимальных условий получения из них комплекса биологически активных веществ (БАВ), обозначаемого как субстанция, с наиболее полным истощением сырья методами мацерации и их экстракцией с применением ультразвука.
Держатели документа:
ЗКУ
Доп.точки доступа:
Жусупова, А.И.
Жумалиева, Г.Т.
Жусупова, Г.Е.
С 34
Сигуатова, С. К.
Разработка оптимальной технологии выделения комплекса биологически активных веществ из растений вида ORIGANUMVULGARE. [Текст] / С. К. Сигуатова, А. И. Жусупова, Г. Т. Жумалиева, Г. Е. Жусупова // Известия НАН РК. - 2021. - №4. - С. 53-60
Рубрики: Биология
Кл.слова (ненормированные):
растения вида Origanum vulgare -- комплекс биологически активных веществ -- микробиологическая чистота -- ультразвуковая экстракция -- мацерация -- субстанция
Аннотация: в данной статье представлены данные по установлению показателей качества растений вида Origanum vulgare (O.vulgare), произрастающих на территории Казахстана, в соответствии с нормативными требованиями Государственной Фармакопеи Республики Казахстан (ГФ РК), разработке и определению оптимальных условий получения из них комплекса биологически активных веществ (БАВ), обозначаемого как субстанция, с наиболее полным истощением сырья методами мацерации и их экстракцией с применением ультразвука.
Держатели документа:
ЗКУ
Доп.точки доступа:
Жусупова, А.И.
Жумалиева, Г.Т.
Жусупова, Г.Е.
540.
Подробнее
38.637
D30
Definition methods mechanical characteristics of sound absorption structures [Текст] / А. U. Nurimbetov, B. Myktybekov, S. A. Orynbayev, M. A. Mezentsev // Известия Национальной Академии наук Республики Казахстан. - 2021. - №2. - Р. 122-128
ББК 38.637
Рубрики: Изоляционные работы--Звукоизоляционные
Кл.слова (ненормированные):
соты -- жесткость -- изгиб -- прочность -- композит -- пластины -- турбовентилятор
Аннотация: Методы проектирования звукопоглощающих конструкций (SAS), используемые в авиационных двигателях, в целом совпадают с методиками проектирования сотовых деталей, многослойных конструкций, которые имеют широкое применение. Однако у SAS есть свои отличительные особенности. Прежде всего, перфорирование шкур уменьшает жесткость деталей. SAS могут иметь различные формы (трех- или пятислойные SAS) и различаться по высоте сот, а также могут быть изготовлены из разных материалов. Все это говорит об эффективных механических характеристиках SAS - жесткость в плоскости слоя, жесткость на изгиб, прочность стыков между отдельными элементами и другие. В настоящее время большинство звукопоглощающих деталей не являются несущими конструкциями, и их механические повреждения или поломки не являются критическими. В то же время SAS, даже изготовленные из относительно легких композитов, имеют большой вес, особенно у турбовентиляторов, что снижает производительность двигателя. Вышеуказанное требует разработки методик для адекватной оценки механических характеристик SAS. Тенденция к получению свойств SAS, необходимых для проектирования при меньших затратах, приводит к необходимости их аналитического прогнозирования. В связи с этим в данной работе представлена аналитическая методика определения механических характеристик SAS. Методы усреднения используются для определения характеристик перфорированных слоев и сотовых сборок
Держатели документа:
ЗКУ
Доп.точки доступа:
Nurimbetov, А. U.
Myktybekov, B.
Orynbayev, S. A.
Mezentsev, M. A.
D30
Definition methods mechanical characteristics of sound absorption structures [Текст] / А. U. Nurimbetov, B. Myktybekov, S. A. Orynbayev, M. A. Mezentsev // Известия Национальной Академии наук Республики Казахстан. - 2021. - №2. - Р. 122-128
Рубрики: Изоляционные работы--Звукоизоляционные
Кл.слова (ненормированные):
соты -- жесткость -- изгиб -- прочность -- композит -- пластины -- турбовентилятор
Аннотация: Методы проектирования звукопоглощающих конструкций (SAS), используемые в авиационных двигателях, в целом совпадают с методиками проектирования сотовых деталей, многослойных конструкций, которые имеют широкое применение. Однако у SAS есть свои отличительные особенности. Прежде всего, перфорирование шкур уменьшает жесткость деталей. SAS могут иметь различные формы (трех- или пятислойные SAS) и различаться по высоте сот, а также могут быть изготовлены из разных материалов. Все это говорит об эффективных механических характеристиках SAS - жесткость в плоскости слоя, жесткость на изгиб, прочность стыков между отдельными элементами и другие. В настоящее время большинство звукопоглощающих деталей не являются несущими конструкциями, и их механические повреждения или поломки не являются критическими. В то же время SAS, даже изготовленные из относительно легких композитов, имеют большой вес, особенно у турбовентиляторов, что снижает производительность двигателя. Вышеуказанное требует разработки методик для адекватной оценки механических характеристик SAS. Тенденция к получению свойств SAS, необходимых для проектирования при меньших затратах, приводит к необходимости их аналитического прогнозирования. В связи с этим в данной работе представлена аналитическая методика определения механических характеристик SAS. Методы усреднения используются для определения характеристик перфорированных слоев и сотовых сборок
Держатели документа:
ЗКУ
Доп.точки доступа:
Nurimbetov, А. U.
Myktybekov, B.
Orynbayev, S. A.
Mezentsev, M. A.
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