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Effect of firing conditions ＆ release height on terminal performance of submunitions and conditions for optimum height of release

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Defence Technology（防务技术） 2017年第3期13卷 200-205页

作者： L.K.Gite A.Anandaraj R.S.Deodhar D.K.Joshi K.M.Rajan Armament Research Development Establishment (arde) Defence Research Development Organization Ministry of Defence Government of India

Submunitions should exhibit optimum terminal performance at target end when released from certain pre-determined height. Selection of an optimum height of release of the submunitions depends on the terminal parameters like forward throw, remaining velocity, impact angle and flight time. In this paper,the effects of initial firing conditions and height of release on terminal performance of submunitions discussed in detail. For different height of release, the relation between range and forward throw is also established & validated for a number of firing altitude and rocket configurations.

关键词：最佳高度终端子弹性能射击剩余速度飞行时间冲击角

Quantification of projection angle in fragment generator warhead

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Defence Technology（防务技术） 2014年第2期10卷 177-183页

作者： K.D.DHOTE K.P.S.MURTHY K.M.RAJAN M.M.SUCHEENDRAN Armament Research and Development Establishment(arde) Department of Aerospace Engineering.Defence Institute of Advanced Technology

Tactical Ballistic Missile(TBM) class target neutralization by the fragment spray of a Fragment Generator Warhead(FGW) calls for quantification of fragment projection angle scatter to finalize the end game engagement *** conventional axi-symmetric warhead,dispersion is assumed to be normal with a standard deviation of 3~***,such information is not available in case of ***,a set of experiments are conducted to determine the dispersion of *** experiments are conducted with a specific configuration of FGW in an identical arena to quantify the scatter and then verified its applicability to other configurations having a range of L/D and C/M ratios,and contoured fragmenting *** the experimental study,it is concluded that the scatter in projection angle follows normal distribution with a standard deviation of 0.75° at Chi-square significance level of 0.01(x_(0.99)~2).

关键词：投影角度量化弹头发生器战术弹道导弹标准偏差正态分布分散体

Dispersion sensitivity analysis&consistency im provement of APFSDS

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Defence Technology（防务技术） 2017年第4期13卷 316-322页

作者： Sangeeta Sharma Panda L.K. Gite A. Anandaraj R.S. Deodhar D.K. Joshi K.M. Rajan Armament Research Development Establishment (arde) Defence Research Development Organization Ministry of Defence Government of India Pashan Pune Maharashtra 411 021 India

The purpose of this study is to investigate and quantify some possible sources of dispersion of 120 mm APFSDS tank ammunition both experimentally and *** paper aims to point out the most influential source during In-Bore Balloting Motion phase as well as in External Ballistics phase of the ammunition and quantifies its effect on *** obtained from flight trials is critically analysed and parameters affecting dispersion such as initial yaw/pitch rates,yaw/pitch dampening,plane start angle,launch spin,clearance,centre of gravity shift,dynamic imbalance angle,cross wind,*** observed and,later on,studied in detail by extensive External Ballistics Monte Carlo(EBMC)simulation and Six Degree of Freedom(6-DOF)trajectory *** Bore Balloting Motion simulation shows that reduction in residual spin by about 5%results in drastic56%reduction in first maximum yaw.A correlation between first maximum yaw and residual spin is *** of data analysis are used in design modification for existing *** of designs are evaluated numerically before freezing five designs for further *** designs are critically assessed in terms of their comparative performance during In-bore travel&external ballistics *** are validated by free flight trials for the finalised design.

关键词： APFSDS Dispersion Consistency Accuracy Yaw rate Spin Muzzle jump factor In-bore dynamics Monte Carlo simulation

An experimental and numerical approach-characterisation of power cartridge for water-jet application

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Defence Technology（防务技术） 2018年第6期14卷 683-690页

作者： Bhupesh Ambadas Parate Sunil Chandel Himanshu Shekhar Armament Research&Development Establishment(arde) Dr.Homi Bhabha RoadPashanPune 411021India Defence Institute of Advanced Technology(DIAT) Giri NagarKhadakwasalaPune411025India High Energy Material Research Laboratory(HEMRL) SutarwadiPashanPune411021India

Power Cartridges are pyrotechnic devices where hot combustion gases utilized to do mechanical work for disruption of suspected Improvised Explosive Devices(IEDs). It plays a vital role either in destroying the suspicious object or making them non-functional by generating the gas pressure on burning of propellant against the water column inside the barrel, Present work is focused on characterisation,numerical solution such as deformation; strain; stress using FEM(Finite Element Method), design qualification, performance and evaluation of power cartridge for disruptor application. Experimental trials for pressure-time(P-t) measurement in closed vessel(CV), various electrical parameters like all fire current(AFC), no fire current(NFC) and ignition delay have been measured. Further, mechanical properties for brass material have been determined. An attempt has been made to characterise the power cartridge by FEM and carrying out the experiments for water-jet application.

关键词： All fire current Closed vessel Booster Characterisation Disruptor Finite element method Ignition delay Maximum pressure No fire current Power cartridge Propellant&water-jet

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预应力复合压力容器的设计依据和结构性能

推进技术 1983年第1期 70-79页

作者： DGleich 陈炳贵 Mahwah 第一副经理 arde Inc AIAA成员

本文讨论预应力纤维/金属复合压力容器的设计依据,并介绍其结构性能数据。昕述的压力容器由强度和韧性高的低温拉伸成形的301不锈钢衬壳组成,衬壳外面用纤维缠绕。金属在压制过程中要增强和预加应力,而纤维在制造复合貯箱过程中,要在液... 详细信息

本文讨论预应力纤维/金属复合压力容器的设计依据,并介绍其结构性能数据。昕述的压力容器由强度和韧性高的低温拉伸成形的301不锈钢衬壳组成,衬壳外面用纤维缠绕。金属在压制过程中要增强和预加应力,而纤维在制造复合貯箱过程中,要在液氮温度下以塑性应变进行预拉伸。文中给出了球形这种特殊情况下的诸结果。在以Kevlar-49纤维外缠于直径25吋的低温拉伸成形的301不锈钢球形容器试验中,已证实一种高循环寿命容器的破裂结构效率系数PV/W为0.84×10~6吋。应用近来改进的石墨纤维(抗拉极限强度为500千磅/吋~2,杨氏模量为34×10~3千磅/吋~2)可使破裂时的结构效率系数预计可超过1.0×10~6吋,也可使外部缠有这纤维的301不锈钢容器重量大大地减轻。

关键词：石墨纤维低温成形极限强度塑性应变人造无机纤维塑性变形金属材料金属预应力结构性能设计依据