{"title":"Fracture of Kinetic Energy Rods Subject to Oblique Impact","authors":"R. L. Anderson","doi":"10.1109/HPCMP-UGC.2006.28","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.28","url":null,"abstract":"The scope of this paper is to examine the ability of CTH, an Eulerian shock physics code, to detect stress concentrations at buttress groove roots and to predict rod fracture due to stress concentrations under simulated experimental conditions. Computational studies were performed using the ARL6A-T rod. Simulations were run using forward ballistics (rod in motion) and reverse ballistics (target in motion). The reverse ballistics simulations yielded results that were qualitatively more accurate","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127618883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Osburn, W. Anderson, R. Rosenberg, M. Lanzagorta
{"title":"Early Experiences on the NRL Cray XD1","authors":"J. Osburn, W. Anderson, R. Rosenberg, M. Lanzagorta","doi":"10.1109/HPCMP-UGC.2006.21","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.21","url":null,"abstract":"Scientists at the Naval Research Laboratory (NRL) are engaged in a broad spectrum of research. In order to provide the high performance computing resources to support that work NRL has recently obtained a three cabinet XD1 with 432 Opteron 275 dual core CPUs, 144 Vertex II FPGAs, and 6 Virtex 4 FPGAs. This paper will examine the applicability of the XD1 to these scientific problems","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115082453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Nehrbass, S. Samsi, J. C. Chaves, J. Unpingco, B. Guilfoos, S. Ahalt, A. Krishnamurthy, A. Chalker, J. Gardiner
{"title":"Interfacing PC-based MATLAB Directly to HPC Resources","authors":"J. Nehrbass, S. Samsi, J. C. Chaves, J. Unpingco, B. Guilfoos, S. Ahalt, A. Krishnamurthy, A. Chalker, J. Gardiner","doi":"10.1109/HPCMP-UGC.2006.40","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.40","url":null,"abstract":"Many DoD HPC users, particularly in the SIP area, run codes developed with MATLAB and related applications (MatlabMPI, StarP, pMatlab, etc.). There is a desire to run codes from a desktop instance of MATLAB and connect to and interact with codes running on HPC resources. The PET SIP team has developed and demonstrated technology that makes this possible. The SSH toolbox for MATLAB enables users to connect to and use HPC resources using SSH without leaving the MATLAB environment. The toolbox uses a freely available implementation of SSH, a modified version of which is also used by the DoD HPCMP. The SSH toolbox consists of a Windows DLL written in C, which is used by MATLAB to communicate with the SSH client. The toolbox provides simple MATLAB commands for users to connect to remote resources, run code, retrieve results and end the SSH session. The complexity of the DLL interface and most of the security needs are hidden from the user, making this a very easy to use and powerful toolbox. Since the main component of the toolbox is written is C and packaged as a DLL, the toolbox can also be extended to work with other programming languages such as Java, Python and Octave. MATLAB-style documentation for the toolbox also makes it easy to obtain help on various aspects of the toolbox and a GUI-based installer makes distribution easier. This technology provides a revolutionary way of providing support to the DoD. Software developers are now able to provide all the hooks to a complicated HPC environment, thus removing the burden of end users","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"344 6‐7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113955993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Morton, J. Forsythe, K. Wurtzler, D. R. McDaniel, R. Cummings, S. Goertz, S. Siegel, K. Squires
{"title":"High Resolution Simulation of Full Aircraft Control at Flight Reynolds Numbers","authors":"S. Morton, J. Forsythe, K. Wurtzler, D. R. McDaniel, R. Cummings, S. Goertz, S. Siegel, K. Squires","doi":"10.1109/HPCMP-UGC.2006.32","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.32","url":null,"abstract":"This paper documents some of the early results of a three year project to develop a computational method for accurately determining static and dynamic stability and control characteristics of fighter and transport aircraft with various weapons configurations as well as the aircraft response to pilot input. In this first year of the project computational data is gathered for a rigid F-16 with no control surface movement in forced motion that approximates flight test maneuvers and wind-tunnel testing techniques. The data is then post-processed to determine the resulting static and dynamic stability characteristics. Static and rigid body motion simulations of the blended wing body bomber/transport concept are performed and compared to detailed experimental data to validate the numerical approach. The main benefits of this effort are: 1) early discovery of complex aerodynamic phenomena that are typically only present in dynamic flight maneuvers and therefore not discovered until flight test, and 2) rapid generation of an accurate aerodynamic database to support aircraft and weapon certification by reducing required flight test hours and complementing current stability and control testing","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124200953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Applied Computational Fluid Dynamics in Support of Aircraft/Store Compatibility and Weapons Integration","authors":"J. Keen","doi":"10.1109/HPCMP-UGC.2006.5","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.5","url":null,"abstract":"The Air Force SEEK EAGLE Office (AFSEO), Eglin Air Force Base (AFB), FL, is the United States Air Force (USAF) authority for weapons certification efforts. AFSEO performs test and evaluation for aircraft/store compatibility certification. Computational fluid dynamics (CFD) is employed to support this process. Determining the flow about an aircraft/store combination may be extremely difficult. Complicated geometry features such as pylons, launchers, grid fins, and internal weapons bays create severe aerothermodynamic and acoustic environments which are challenging to simulate numerically. Rapidly and accurately modeling the trajectory of store separation in a high-volume simulation environment presents an additional challenge. The USAF requirement for numerous, simultaneous and quick-reaction solutions for a wide variety of stores and aircraft can only be accomplished through application of parallel high-performance computing resources that meet the significant computational and memory demands associated with the certification computational environment. Before operational use, all aircraft/store configurations must be certified for safe loading, carriage, and jettison/release. AFSEO provides flight certification recommendations which are based on combinations of engineering analysis, ground, and flight testing. Engineering analyses is provided by disciplines in carriage loads, store separations, flutter, ballistics, stability and control, and electromagnetic compatibility and interference. The AFSEO Computational Aeromechanics Team (CAT) provides time-critical CFD support for engineering analyses to optimize ground and flight testing. This contribution takes the form of carriage aerodynamic loads, store separation predictions, and visualized flow field physics. The knowledge created reduces risk, lowers cost, and speeds the fielding of new weapons. This paper discusses four of the applied AFSEO CFD tasks related to specific aircraft/store investigations and certifications","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123757310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"New Ferroelectrics for Naval SONAR and Modeling of Nanoscale Ferroelectric Nonvolatile Memory Materials","authors":"A. Kolpak, I. Grinberg, A. Rappe, Shawn T. Brown","doi":"10.1109/HPCMP-UGC.2006.50","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.50","url":null,"abstract":"Using quantum-mechanical simulations, we have computationally investigated new materials for use in Naval Sound Navigation and Ranging (SONAR). At the nanoscale, our quantum-mechanical studies show that ferroelectricity and the resultant favorable properties are stable at dimensions much smaller than previously thought. We have demonstrated that charge compensation by molecular adsorbates is more efficient than by traditional metal electrodes. This enables even a single molecular electrode to stabilize full-strength ferroelectricity in ultra-thin films and nanowires. We also report successful porting and performance tuning of our computer codes to the CRAY XT3 platform","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128416964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. McClean, D. Ivanova, J. Carton, B. Giese, E. Hunke, M. Maltrud
{"title":"Fine-Resolution Global Sea-Ice/Ocean Modeling and Data Assimilation","authors":"J. McClean, D. Ivanova, J. Carton, B. Giese, E. Hunke, M. Maltrud","doi":"10.1109/HPCMP-UGC.2006.26","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.26","url":null,"abstract":"The focus of our recent work has been to continue global simulations using the Los Alamos Parallel Ocean Program (POP) model and the sea ice model (CICE), as well as ensemble runs using the Simple Ocean Data Assimilation (SODA) and POP (SODA POP). The primary goal of the former effort is to simulate fine resolution (0.1deg) global ice fields using CICE, obtain measures of their veracity, and then move forward with a global coupled 0.1deg POP/CICE simulation. Sensitivity runs using the less computationally expensive global coupled 0.4deg POP/CICE simulation have also been conducted. In the latter effort ensemble runs with SODA-POP are being used to evaluate the relative impact of using different surface boundary conditions and assimilating different data","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130526622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nonlinear Equalization for RF Receivers","authors":"B. Kam, B. Miller, J. Goodman, G. Raz","doi":"10.1109/HPCMP-UGC.2006.51","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.51","url":null,"abstract":"This paper describes the need for high performance computing (HPC) to facilitate the development and implementation of a nonlinear equalizer that is capable of mitigating and/or eliminating nonlinear distortion to extend the dynamic range of radar front-end receivers decades beyond the analog state-of-the-art. The search space for the optimal nonlinear equalization (NLEQ) solution is computationally intractable using only a single desktop computer. However, we have been able to leverage a combination of an efficient greedy search with the high performance computing technologies of LLGrid and MatlabMPI to construct an NLEQ architecture that is capable of extending the dynamic range of radar front-end receivers by over 25dB","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"23 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123731951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Targeting CCM-, CEA-, and CSM-Based Computing to Specific Architectures Based upon HPCMP Systems Assessment","authors":"P. Bennett, S. Cable, M. Mahmoodi, T. Oppe","doi":"10.1109/HPCMP-UGC.2006.69","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.69","url":null,"abstract":"Each year the Department of Defense High Performance Computing Modernization Program (HPCMP) acquires new super computing hardware through a rigorous acquisition process, denoted \"TI\" for technology insertion, based primarily on application benchmarking. The corresponding suite of applications spans many disciplines and is carefully constructed to ensure that the HPCMP workload is accurately reflected. For the most recent acquisition cycle (TI-06), GAMESS, LAMMPS, OOCORE, and CTH7 were used to represent the computational chemistry and materials (CCM), computational electromagnetics and acoustics (CEA), and computational structural mechanics (CSM) computational technology areas (CTAs) in the workload, respectively. This paper will compare the performance of these four codes representing the CCM, CEA, and CSM components, respectively, of the TI-06 benchmarking suite on HPCMP systems to determine which system is best suited for each CTA","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130140840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of Projectile and Cover Material Strength and Projectile Shape on the Impact Initiation of Composition B","authors":"W. Lawrence, J. Starkenberg","doi":"10.1109/HPCMP-UGC.2006.23","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.23","url":null,"abstract":"To improve understanding of the response of munitions impacted by various types of projectiles, a combined experimental and computational study was conducted. The experimental configurations were simulated using the CTH hydrocode and the history variable reactive burn (HVRB) initiation model. Three-dimensional simulations of projectile impact on covered explosives were performed and the critical velocities for initiation were determined. Simulations performed for the purpose of determining whether the relative strength of the projectile and the cover affect the critical velocity showed little influence. Additional simulations for projectiles shaped like parallelepipeds were performed to shed light on the effect of the aspect ratio of the impacting face of the projectile. The results showed that face area alone does not determine critical velocity","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125564648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}