有限元程序LS-DYNA SMP R11.2.1 x64

LS-DYNA是一种通用的有限元程序，能够模拟复杂的现实世界中的问题。它被汽车，航空航天，建筑，军事，制造和生物工程行业所使用。该代码的起源在于使用显式时间积分的高度非线性，瞬态动态有限元分析。

LS-DYNA的潜在应用是众多的，可以针对许多领域进行量身定制。在给定的仿真中，可以将LS-DYNA的许多功能中的任何一项组合起来，以对各种物理事件进行建模。NASA JPL火星探路者着陆模拟是一个模拟示例，其中包含独特的功能组合，该模拟可以模拟太空探测器使用安全气囊来辅助其着陆。LS-DYNA是最灵活的有限元分析软件包之一。

LS-DYNA由单个可执行文件组成，并且完全由命令行驱动。因此，运行LS-DYNA所需的只是命令外壳，可执行文件，输入文件和足够的可用磁盘空间来运行计算。所有输入文件均为简单ASCII格式，因此可以使用任何文本编辑器进行准备。输入文件也可以借助图形预处理器即时准备。

有许多第三方软件产品可用于预处理LS-DYNA输入文件。LSTC还开发了自己的预处理器LS-PrePost，该处理器可自由分发并无需许可即可运行。LS-DYNA的被许可方可以自动访问该程序的所有功能，从简单的线性静态机械分析到高级的热和流量求解方法。此外，他们充分利用了LS-OPT，这是一个独立的设计优化和概率分析程序包，具有与LS-DYNA的接口。

LS-DYNA is a general-purpose finite element program capable of simulating complex real world problems. It is used by the automobile, aerospace, construction, military, manufacturing, and bioengineering industries. The code’s origins lie in highly nonlinear, transient dynamic finite element analysis using explicit time integration.

“Nonlinear” means at least one (and sometimes all) of the following complications:

• Changing boundary conditions (such as contact between parts that changes over time)
• Large deformations (for example the crumpling of sheet metal parts)
• Nonlinear materials that do not exhibit ideally elastic behavior (for example thermoplastic polymers)

“Transient dynamic” means analyzing high speed, short duration events where inertial forces are important. Typical uses include:

• Automotive crash (deformation of chassis, airbag inflation, seatbelt tensioning)
• Explosions (underwater Naval mine, shaped charges)
• Manufacturing (sheet metal stamping)

LS-DYNA’s potential applications are numerous and can be tailored to many fields. In a given simulation, any of LS-DYNA’s many features can be combined to model a wide range of physical events. An example of a simulation, which involves a unique combination of features, is the NASA JPL Mars Pathfinder landing simulation which simulated the space probe’s use of airbags to aid in its landing. LS-DYNA is one of the most flexible finite element analysis software packages available.

LS-DYNA consists of a single executable file and is entirely command line driven. Therefore all that is required to run LS-DYNA is a command shell, the executable, an input file, and enough free disk space to run the calculation. All input files are in simple ASCII format and thus can be prepared using any text editor. Input files can also be prepared with the instant aid of a graphical preprocessor.

There are many third party software products available for preprocessing LS-DYNA input files. LSTC also develops its own preprocessor, LS-PrePost, which is freely distributed and runs without a license. Licensees of LS-DYNA automatically have access to all of the program’s capabilities, from simple linear static mechanical analysis up to advanced thermal and flow solving methods. Furthermore, they have full use of LS-OPT, a standalone design optimization and probabilistic analysis package with an interface to LS-DYNA.

Capabilities
LS-DYNA’s analysis capabilities include:

• Full 2D & 3D capabilities
• Nonlinear dynamics
• Rigid body dynamics
• Quasi-static simulations
• Normal modes
• Linear statics
• Thermal analysis
• Fluid analysis
  • Eulerian capabilities
  • ALE (Arbitrary Lagrangian-Eulerian)
  • FSI (Fluid-Structure Interaction)
  • Navier-Stokes fluids
  • Compressible fluid solver, CESE (Conservation Element & Solution Element)
• FEM-rigid multi-body dynamics coupling (MADYMO, Cal3D)
• Underwater shock
• Failure analysis
• Crack propagation
• Real-time acoustics
• Implicit springback
• Multi-physics coupling
• Structural-thermal coupling
• Adaptive remeshing
• SPH (Smoothed Particle Hydrodynamics)
• EFG (Element Free Galerkin)
• Radiation transport
• EM (Electromagnetism)

Material Library
LS-DYNA’s material library includes:

• Metals
• Plastics
• Glass
• Foams
• Fabrics
• Elastomers
• Honeycombs
• Concrete & soils
• Viscous fluids
• User-defined materials

Element Library
LS-DYNA’s element library includes:

• Beams (standard, trusses, discrete, cables, and welds) (with over 10 beam element formulations)
• Discrete Elements (springs and dampers)
• Lumped inertias
• Lumped masses
• Accelerometers
• Sensors
• Seatbelts
  • Pretensioners
  • Retractors
  • Sliprings
• Shells (3, 4, 6, and 8-node including 3D shells, membranes, 2D plane stress, plane strain, and axisymmetric solids) (with over 25 shell element formulations)
• Solids (4 and 10-node tetrahedrons, 6-node pentahedrons, and 8-node hexahedrons) (with over 20 solid element formulations)
• SPH Elements
• Thick Shells (8-node)

Contact Algorithms
LS-DYNA’s contact algorithms include:

• Flexible body contact
• Flexible body to rigid body contact
• Rigid body to rigid body contact
• Edge-to-edge contact
• Eroding contact
• Tied surfaces
• CAD surfaces
• Rigid walls
• Draw beads