{"title":"Performance of NIKE3D with PVSOLVE on vector and parallel computers","authors":"Bradley N. Maker , Qin Jiangning , Duc T. Nguyen","doi":"10.1016/0956-0521(94)90018-3","DOIUrl":"10.1016/0956-0521(94)90018-3","url":null,"abstract":"<div><p>The cost of large implicit finite element calculations is dominated by the linear equation solver. In this work, several versions of the direct linear equation solver PVSOLVE were implemented in the general purpose, nonlinear finite element code NIKE3D. Timing studies were performed on Sun and IBM workstations, CRAY Y/MP and C90 supercomputers, and the distributed memory MEIKO CS-2 parallel computer. Cost breakdowns and efficiency curves are presented for a benchmark problem with several mesh densities. The distributed memory implementation is shown to be most efficient for large problems, where MEIKO performance is comparable to that of a single CRAY processor.</p></div>","PeriodicalId":100325,"journal":{"name":"Computing Systems in Engineering","volume":"5 4","pages":"Pages 363-368"},"PeriodicalIF":0.0,"publicationDate":"1994-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-0521(94)90018-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84322368","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":"Laminated plate design using genetic algorithms and parallel processing","authors":"Joseph Lynn Henderson","doi":"10.1016/0956-0521(94)90025-6","DOIUrl":"10.1016/0956-0521(94)90025-6","url":null,"abstract":"<div><p>The use of a parallel computer in the stacking sequence optimization of a composite laminate via a genetic algorithm is studied. Results are obtained for a graphite-epoxy plate under buckling, strain, and ply contiguity constraints. Two parallelization schemes for the optimization problem are proposed and compared. Results are presented showing the computation time as a function of the number of processors, illustrating the benefits and drawbacks of both schemes. A new technique for design population visualization is also developed as a tool for monitoring the performance of the genetic algorithm.</p></div>","PeriodicalId":100325,"journal":{"name":"Computing Systems in Engineering","volume":"5 4","pages":"Pages 441-453"},"PeriodicalIF":0.0,"publicationDate":"1994-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-0521(94)90025-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72777217","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":"Parallel adaptive finite element analysis of large scale structures","authors":"Dipankar K. Ghosh, Prodyot K. Basu","doi":"10.1016/0956-0521(94)90015-9","DOIUrl":"10.1016/0956-0521(94)90015-9","url":null,"abstract":"<div><p>A scalable parallel feedback algorithm for adaptive finite element modeling of large scale structures is presented. This algorithm is implementable on MIMD parallel processors, and uses the p-extension of the finite element method. The problem domain is partitioned into a number of suitable subdomains by using an automatic domain decomposer, and each subdomain is thereupon assigned to a processor in the multiprocessor system. Connection Machine's CM-5 system is being used for the present implementation. Most of the previous efforts to parallelize finite element analysis were confined to parallel algorithms for direct or iterative equation solvers, and did not produce satisfactory performance because of the small granularity of parallel tasks. Also, these efforts were based on the h-extension of the finite element method, and hence could not exploit some of the inherent advantages available in the p-extension. As the current algorithm utilizes the domain decomposition technique and is based on the p-version of the finite element method, it is expected to produce good performance, particularly for large scale structures. The feedback algorithm is based on an iterative scheme derived from the domain decomposition technique for applications to problems of solid mechanics. It has been tested for two-dimensional problems showing good convergence characteristics. Current efforts are also directed towards generalizing the scheme, and include adaptive model refinement.</p></div>","PeriodicalId":100325,"journal":{"name":"Computing Systems in Engineering","volume":"5 4","pages":"Pages 325-335"},"PeriodicalIF":0.0,"publicationDate":"1994-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-0521(94)90015-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74709534","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":"Parallel implementation of dynamic simulation to filamentary composite structures with general rate dependent damping","authors":"Sung Yi Kendall, H. Pierson, M. Fouad^Ahmad","doi":"10.1016/0956-0521(94)90027-2","DOIUrl":"10.1016/0956-0521(94)90027-2","url":null,"abstract":"<div><p>In the present study, we propose to implement the dynamic viscoelastic finite element algorithm in a scalable distributed parallel environment using a generic message passing library such as PVM. The conjugate gradient algorithm are used for the solution of the system of the equations. Various mesh sizes were considered. The problem is decomposed into a number of regions and is solved in an equal number of processors. The performance of a PVM master/slave visco-elastic finite element program is evaluated on the CM-5.</p></div>","PeriodicalId":100325,"journal":{"name":"Computing Systems in Engineering","volume":"5 4","pages":"Pages 469-477"},"PeriodicalIF":0.0,"publicationDate":"1994-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-0521(94)90027-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81054476","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":"Structural safety analysis of fixed offshore platforms","authors":"M.R. Justino Filho, N.F.F. Ebecken","doi":"10.1016/0956-0521(94)90019-1","DOIUrl":"10.1016/0956-0521(94)90019-1","url":null,"abstract":"<div><p>The objective of this paper is to discuss the structural safety analysis of large framed offshore structures on distributed memory parallel computers. It involves: automatic FEM domain decomposition, sparse multifrontal method, elastic-plastic incremental analysis with strain-hardening and large displacements effects and reliability analysis procedures. An application is presented to illustrate the strategy potentialities on the Intel iPSC/860 hypercube.</p></div>","PeriodicalId":100325,"journal":{"name":"Computing Systems in Engineering","volume":"5 4","pages":"Pages 369-374"},"PeriodicalIF":0.0,"publicationDate":"1994-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-0521(94)90019-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87260741","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":"A new method for failure prediction of SR-200 beryllium sheet structures","authors":"P.P. Papados , P.N. Roschke","doi":"10.1016/0956-0521(94)90007-8","DOIUrl":"https://doi.org/10.1016/0956-0521(94)90007-8","url":null,"abstract":"<div><p>Contemporary applications of failure criteria frequently incorporate two-dimensional or simplified three-dimensional methodologies for prediction of failure stresses. Motivation behind the development of a new multi-dimensional failure criterion is due mainly to the lack of a sufficiently accurate mathematical tool that accounts for the behavior of brittle material with anisotropic properties. Such a criterion should be able to provide a reliable maximum load estimate so that design of the structure is not penalized in terms of excessive weight requirements. The failure criterion developed is represented by a fracture surface in a six-dimensional stress space. The criterion is applied for failure prediction of SR-200 beryllium sheet structures, a non-homogeneous orthotropic material used widely in space applications. Two experiments are used to verify the criterion.</p></div>","PeriodicalId":100325,"journal":{"name":"Computing Systems in Engineering","volume":"5 3","pages":"Pages 285-293"},"PeriodicalIF":0.0,"publicationDate":"1994-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-0521(94)90007-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91754224","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":"Parallelization of a multilevel domain decomposition method","authors":"Yves Escaig , Gilbert Touzot , Michel Vayssade","doi":"10.1016/0956-0521(94)90004-3","DOIUrl":"https://doi.org/10.1016/0956-0521(94)90004-3","url":null,"abstract":"<div><p>This article deals with the implementation of the finite element method on MIMD (Multiple Instructions Multiple Data) multiprocessor machines with shared or distributed memory. This implementation is based on a multilevel domain decomposition method, using a direct solver for the interface problem. In the first part of this paper, we show the different steps of such an implementation on a shared memory machine, as well as the performance obtained on a CRAY Y-MP. In the second part, the main problems raised by implementation on distributed memory machines are considered. The Performance obtained on a cluster of IBM RS/6000 workstations, connected via an Ethernet network, using the PVM (Parallel Virtual Machine) software is also presented.</p></div>","PeriodicalId":100325,"journal":{"name":"Computing Systems in Engineering","volume":"5 3","pages":"Pages 253-263"},"PeriodicalIF":0.0,"publicationDate":"1994-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-0521(94)90004-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91754217","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":"Transient flight loads estimation for spacecraft structural design","authors":"Srinivas Kodiyalam","doi":"10.1016/0956-0521(94)90006-X","DOIUrl":"https://doi.org/10.1016/0956-0521(94)90006-X","url":null,"abstract":"<div><p>Quick and effective estimation of transient dynamic flight loads is a critical part of the spacecraft structural design process. In this work, a transient base drive procedure is used to estimate the flight loads on a spacecraft, during the spacecraft design iterations. In this base drive procedure, only the spacecraft dynamic model is used as against a coupled spacecraft-launch vehicle dynamic models. The well established fixed interface modal model representation, with a determinate interface, is used for the spacecraft substructure. The second part of this paper is on a new, constrained optimization based procedure for notching the qualification level sine vibration profile, specified by the launch vehicle organization. The base drive and the “notched” sine vibration profile generation procedures are demonstrated on a spacecraft stick model and a spacecraft structure with solar array panels.</p></div>","PeriodicalId":100325,"journal":{"name":"Computing Systems in Engineering","volume":"5 3","pages":"Pages 275-283"},"PeriodicalIF":0.0,"publicationDate":"1994-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-0521(94)90006-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91754223","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":"Transient flight loads estimation for spacecraft structural design","authors":"S. Kodiyalam","doi":"10.1016/0956-0521(94)90006-X","DOIUrl":"https://doi.org/10.1016/0956-0521(94)90006-X","url":null,"abstract":"","PeriodicalId":100325,"journal":{"name":"Computing Systems in Engineering","volume":"8 1","pages":"275-283"},"PeriodicalIF":0.0,"publicationDate":"1994-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82063242","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":"Applications of Artificial Intelligence in Engineering VII","authors":"Bimal Kumar","doi":"10.1016/0956-0521(94)90008-6","DOIUrl":"https://doi.org/10.1016/0956-0521(94)90008-6","url":null,"abstract":"","PeriodicalId":100325,"journal":{"name":"Computing Systems in Engineering","volume":"5 3","pages":"Page 295"},"PeriodicalIF":0.0,"publicationDate":"1994-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-0521(94)90008-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91754221","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}
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