توضیحات
The Users Manual is one of four manuals that constitute the documentation for NASTRAN, the
other three being the Theoretical Manual, the Programmers Manual and the Demonstration Problem
Manual .
Although the Users Manual contains all of the information that is directly associated
with the solution of problems with NASTRAN, the user will find it desirable to refer to the other
manuals for assistance in the solution of specific user problems.
The Theoretical Manual gives an excellent introduction to NASTRAN and presents developments of
the analytical and numerical procedures that underlie the program.
The Users Manual is
instructive and encyclopedic in nature, but is restricted to those items related to the use of
NASTRAN that are generally independent of the computing system being used.
Computer-dependent
topics and information that is required for the maintenance and modification of the program are
treated in the Programmers Manual.
The Programmers Manual also provides a complete description
of the program, including the mathematical equations implemented in the code.
The Demonstration
Problem Manual presents a discussion of the sample problems delivered w!th NASTRAN, thereby
illustrating the formulation of the different types of prob!emsthat can b~ solved with NASH?PN.
In addition to the four manual~ described above, there is also a NASTRAN Users Guide that
serves as a handbook for users.
It describes all of the NASTRAN features and options and
illustrates them by examples.
Other excellent sources for NASTRAN-related topics are the
proceedings of the NASTRAN Users Colloquia (held normally every year) which provide a large body
of information based on user experiences with NASTRAN.
The Users Manual has recently been completely revised and updated.
With a view to facilitate
easier updating of the manual in the future to keep up with newer releases of NASTRAN, it has now
been divided into two volumes.
Volume I consists of seven sections dIldcontains all of the material that was in the old
single volume, except Section 3.
This section has been re-arranged into four sections and forms
Volume II.
In order to avoid confusion, Section 3 of Volume I does not contain anything other than
a reference to the new Volume II.
Also, it should be noted here that, unless explicitly indicated
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otherwise,
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all
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references
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to …. sections
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in each ..—
volume refer onl y to
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that volume,
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NASTRAN uses the finite element approach to structural modeling, wherein the distributed
physical properties of a structure are represented by a finite number of structural elements which
are interconnected at a finite number of grid points, to which loads are applied and for which
displacements arecalculated.
The procedures for defining and loading a structural model are described in Volume I, Section 1.
This section contains a functional reference for every card that
is used for structural modeling.
The NASTRAN Data Deck, including the details for each of the data cards, is described in
Volume I, Section 2.
This section also discusses the NASTRAN control cards that are associated
with the use of the program.
As mentioned earlier, Volume I, Section 3 does not contain anything other than a reference to
Volume II.
The procedures for using the NASTRAN plotting capability are described in Volume I, Section 4.
Both deformed and undeformed plots of the structural model are available.
Response curves are also
available for static, transient response, frequency response, modal flutter and modal aeroelastic
response analyses.
NASTRAN contains problem solution sequences, called rigid formats,
Each of these rigid
formats is associated with the solution of problems for a particular type of static or dynamic
analysis.
in addition to the rigid format procedures, the user may choose to write his own Direct Matrix
Abstraction Program (DMAP),
This procedure permits the user to execute a series of matrix
operations of his choice along with any utility modules or executive operations that he may need.
The rules governing the creation of DMAP programs are described in Volume I, Section 5.
The NASTRAN diagnostic messages are documented and explained in Volume I, Section 6.
The
NASTRAN Dictionary, in Volume I, Section 7, contains descriptions of mnemonics, acronyms, phrases,
and other commonly used NASTRAN terms.
Volume II, Section 1 contains a general description of rigid format procedures.
Specific
instructions and information for the use of each rigid format are given in Volume II, Sections 2, 3
and 4, which deal with the rigid formats associated with the DISPLACEMENT, HEAT and AERO
approaches, respectively.
There is a limited number of sample problems included in the Users Manual.
However, a more
comprehensive set of demonstration problems, at least one for each of the rigid formats, is
described in the NASTRAN Demonstration Problem Manual,
The data decks are available on tape for
each of the computer systems on which NASTRAN has been implemented.
Samples of the printer output
and of structure plots and response plots can be obtained by executing these demonstration
problems.
The printer output for these problems is also available on microfiche.
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ترجمه ماشینی :
کتابچه راهنمای کاربران یکی از چهار دفترچه راهنما است که مستندات Nastran را تشکیل می دهد ،
سه کتابچه راهنمای نظری ، کتابچه راهنمای برنامه نویسان و مشکل تظاهرات
کتابچه راهنمای .
اگرچه کتابچه راهنمای کاربران شامل تمام اطلاعاتی است که به طور مستقیم در ارتباط است
با حل مشکلات مربوط به Nastran ، کاربر آن را مطلوب می داند که به دیگری مراجعه کند
دفترچه راهنما برای کمک به حل مشکلات خاص کاربر.
کتابچه راهنمای نظری مقدمه ای عالی برای Nastran ارائه می دهد و تحولات را ارائه می دهد
روشهای تحلیلی و عددی که زیربنای برنامه است.
کتابچه راهنمای کاربران است
آموزنده و دائر ycl المعارف از نظر طبیعت ، اما محدود به موارد مربوط به استفاده از آن است
nastran که به طور کلی مستقل از سیستم محاسباتی است که مورد استفاده قرار می گیرد.
وابسته به کامپیوتر
مباحث و اطلاعاتی که برای نگهداری و اصلاح برنامه مورد نیاز است
در کتابچه راهنمای برنامه نویسان درمان می شود.
کتابچه راهنمای برنامه نویسان نیز شرح کاملی را ارائه می دهد
از این برنامه ، از جمله معادلات ریاضی که در کد اجرا شده است.
تظاهرات
کتابچه راهنمای مشکل بحث در مورد مشکلات نمونه تحویل داده شده را ارائه می دهد ، از این طریق
نشان دادن فرمولاسیون انواع مختلف پروب!
علاوه بر چهار دفترچه راهنما – که در بالا توضیح داده شد ، یک راهنمای کاربران Nastran نیز وجود دارد که
به عنوان کتابچه راهنمای کاربران خدمت می کند.
این همه ویژگی ها و گزینه های Nastran را توصیف می کند و
آنها را با مثال نشان می دهد.
منابع عالی دیگر برای موضوعات مرتبط با Nastran عبارتند از
مجموعه مقالات کاربران Nastran Colloquia (که به طور عادی هر سال برگزار می شود) که بدن بزرگی را فراهم می کند
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