Andreev

Woodruff and co-workers introduced the expert system PAIRS [67], a program that is able to analyze IR spectra in the same manner as a spectroscopist would. Chalmers and co-workers [68] used an approach for automated interpretation of Fourier Transform Raman spectra of complex polymers. Andreev and Argirov developed the expert system EXPIRS [69] for the interpretation of IR spectra. EXPIRS provides a hierarchical organization of the characteristic groups that are recognized by peak detection in discrete ames. Penchev et al. [70] recently introduced a computer system that performs searches in spectral libraries and systematic analysis of mixture spectra. It is able to classify IR spectra with the aid of linear discriminant analysis, artificial neural networks, and the method of fe-nearest neighbors. 

Alexander Andreev. Alexey Bunkevich, Alexey Andreev... 

Kiev National Taras Shevchenko University, geological department E-mail andreev univ.kiev.ua... 

Andreev, V G, Kolomiets, A F, Sokol skii,G A Dokl Akad NaukSSSR 1980,250, 1386, Chem Abstr 1980,9J, 45853s... 

Fig 2. Critical diameter of TNT as a function of initial density. 1. Pressed or powder after Andreev and Belyaev (1960) (Ref 6). 

Andreev Chulko (Ref 7) claim that the pressure above which PETN combustion becomes unsteady and accelerates decreases with increasing PETN particle size. Other studies suggest that there is an optimum particle size for DDT (see Sect VII of Propellants, Solid in this Vol). In a recent study, Bernecker et al (Ref 16) found that at a given degree of compaction, 20-micron Tetryl had a longer run-up to detonation, 12, than 470-micron Tetryl. This is shown in Fig 3... 

AMCP 706-177 (1971) gives the power of PETN as 145% of TNT in the Ballistic Mortar and 173% of TNT in the Trauzl block. It also lists PETN s brisance at 1.5g/cc as 129% of TNT as detd in plate dent test. The Russians use a somewhat different measure of power which they call total efficiency . This involves computing expln product expansion to 1 atm. Andreev Belyaev (Ref 25, p 655) list the total efficiency of 1.6g/cc PETN as 134% of TNT... 

According to Andreev and coworkers (Refs 26a 38) and Kaidymov (Ref 62) the decompn of solid PETN is much slower than that of molten PETN. They suggest that paritial melting occurs during decompn at temps below the PETN mp and this increases the decompn rate. The increase in the PETN decompn rate in the presence of TNT (observed by Urbanski et al, Ref 3) is claimed to be brought about similarly, ie, the PETN-TNT system forms low melting eutectics and PETN decompn proceeds, in effect, in a TNT soln (Ref 38)... 

Andreev Chuiko (Ref 35) observed stable burning in PETN of 5 micron particle size and relative density 6 = 1.17, up to 60 atm pressure. At higher pressures (up to 100 atm) burning rate increased rapidly. The pressure at which transition from stable to accelerating... 

Andreev Gordunov (Ref 36) define a critical pressure P<. above which the pressure in the burning PETN increases drastically in a short time interval r... 

K.K. Andreev, Slow Decomposition of Explosives and Tests of Chemical Stability , ComptRendCongrlnternChimlnd 31, Liege... 

J.C. Dacons, The Relationship of Thermal Stability With Structure of Organic High Explosives, I. Trinitrophenyl Derivatives With One Alpha C-H Linkage , NAVORD. NOLTR-62-192, AD 334079L (1962) 128) K.K. Andreev,... 

Thermal Decomposition. The definitive study of the thermal decompn of PA was made by Andreev and Uu Pao-Feng (Ref 34). They followed the decompn of liq PA manometrically over the temp... 

Combustion. Like many other granular expls, PA will burn quite stably with an increase in burning rate as the ambient pressure is increased. Andreev (Ref 34, p 377) gives the following... 

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