| دانلود رایگان مقاله انگلیسی + خرید ترجمه فارسی
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| عنوان فارسی مقاله: |
شبیه سازی عددی تحلیل تصادف خودرو براساس توزیع محاسباتی |
| عنوان انگلیسی مقاله: |
Numerical Simulation of Car Crash Analysis Based on Distributed Computational Environment |
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| مشخصات مقاله انگلیسی (PDF) | |
| سال انتشار | 2002 |
| تعداد صفحات مقاله انگلیسی | 4 صفحه با فرمت pdf |
| رشته های مرتبط با این مقاله | مهندسی مکانیک و مهندسی برق |
| گرایش های مرتبط با این مفاله | مکاترونیک، طراحی جامدات، بیومکانیک، مکانیک خودرو، طراحی کاربردی و ابزاردقیق |
| مجله | کنفرانس بین المللی الگوریتم و معماری پردازش موازی(International Conference on Algorithms and Architectures for Parallel Processing) |
| دانشگاه | دانشکده علوم مهندسی و مکانیک، دانشگاه فودان |
| لینک مقاله در سایت مرجع | لینک این مقاله در سایت IEEE |
| نشریه | IEEE |
| مشخصات و وضعیت ترجمه فارسی این مقاله (Word) | |
| تعداد صفحات ترجمه تایپ شده با فرمت ورد با قابلیت ویرایش و فونت 14 B Nazanin | 7 صفحه |
| ترجمه عناوین تصاویر | ترجمه شده است |
| ترجمه متون داخل تصاویر | ترجمه نشده است |
| درج تصاویر در فایل ترجمه | درج شده است |
- فهرست مطالب:
چکیده
۱مقدمه
۲ مروری برنرم افزار DYNA3D
۳ نرم افزار DYNA3D موازی شده
۴ نتایج عددی
۵ نتایج عددی از نرم افزار LC DYNA3D
۶ نتیجه گیری
- بخشی از ترجمه:
به كمك اين نرم افزار ، پژوهش ما منجر به نتايج شبيه سازي برخورد اتوماتيك شده است. براي ايجاد پژوهش و توسعه شبكه هاي عملكردي بالا را مي توان از آن استفاده كرد كه مي تواند به صنعت ساخت و توليد پيشرفته خودرو در كشور ما كمك كند كه براي ايجاد يك محيط محاسباتي عمومي براي طراحي عملكرد به كمك كامپيوتر و شبيه سازي مي باشد. علاوه براين به اشتراك گذاري منابع كمك خواهد كرد كه كامپيوتر با كارايي بالايي در دامنه نسبتا بزرگي وجود داشته باشد. با استفاده تكنيك هاي پيشرفته مي توان از استانداردهاي علمي در صنعت ساخت و توليد پيشرفته، وضعيت اين صنعت را در كشور بهبود داد.
- بخشی از مقاله انگلیسی:
INTRODUCTION In keeping up with international standards, the research on the collision process of car body structure is indispensable. Autos composite collision, transient and response process can be derived from highly nonlinear transient dynamics. So an explicit finite element program of nonlinear dynamical analysis can successfully solve nonlinear contact, nonlinear shock load and nonlinear material caused by high-speed collision of car body structure. Three-dimensional DYNA3D collision analysis program derives itself from two-dimensional DYNA2D program, which has experienced those versions over the years of 1984, 1987, 1992, 1995 and so on. The latest DYNA3D now takes more factors into account, such as large deformation, non-elastic material and contact slide boundary. Developing rapidly and being increasingly powerful, it has become a general collision analysis program. Since 1995, DYNA3D has been applied to the concurrent computational program in some vector computers. DYNA3D Version 92 is an explic it nonlinear finite element program for analyzing transient dynamical response of three-dimensional solid and structures. The element units in the program include one-dimensional beam element, two-dimensional quadrilateral element and triangular element and three-dimensional solid element, altogether four categories of elements. DYNA3D program can effectively describe thirty material models’ functions. It is suitable for the model which is elastic or plastic when compound substance is used, and heating effect and load rate is considered. The models are follow-up/isotropic, elastic -plastic, thermo-elastic-plastic, soil, linear viscoelastic, gum-elastic, high-energy dynamite combustion, elastic -plastic fluid or geological model, etc. In addition, there are ten state equations that can be chosen to fit some kind of material model. As we dispose all of the element units with simple methods, it is applicable to rigid material simulating rigid kinetics, and to rigid material precisely describing geometrical and mass distribution of complex substance. So the units in the program are also suitable for large strain, great rotate condition, nonlinear material condition and rigid body. In particular, the program is unique in dealing with frictional slide and uni-surface contact. It can be used to assess the force between two independent objects or between any two mechanical links in the same object. The program includes eleven unique contact-collide algorithms, six methods of attachment and shell unit node-entitative node connection. They can make up all kinds of complicated engineering structure and can be used in collided and explosion load computation, collide-contact problems and so on. III. DYNA3D PARALLELIZATION As to massive parallel program, the existing solution is to use automatic area and grid division techniques so it becomes parallel explicit finite element program. Every processor needs only very little communication with other processors but can process much more work. Generally the simulation model for the whole auto collision is very large. We have made numerical simulation of Honda model collision on single processor using Version 92 DYNA3D program. The whole model has 8112 nodes, 1440 solid elements, 91 beam elements, 6005 shell elements, and the whole simulation process lasts about the order of 10 hours. It is evident that the efficiency of single processor is relatively very low, so we work on a massive parallel computer, Dawning-2000, in National High Performance Computing Center (Shanghai) and make improvement on Version 92 DYNA3D Fortran source code. The whole auto model mainly consists of beam elements, shell elements, solid elements and discrete elements, and most are shell element. Therefore, most of the computational quantity of numerical simulation comes from the computation of shell elements. As each shell element is independent from each other, so the computation of shell elements in DYNA3D program can be paralleled. The following shows the structured flowchart of shell-element computation subprogram in DYNA3D program.
| دانلود رایگان مقاله انگلیسی + خرید ترجمه فارسی
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| عنوان فارسی مقاله: |
استفاده از توزیع محاسباتی برای شبیه سازی عددی آنالیز تصادف خودرو |
| عنوان انگلیسی مقاله: |
Numerical Simulation of Car Crash Analysis Based on Distributed Computational Environment |
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