LS-DYNA K文件用户手册：理解与应用指南

LSDYNA

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"这份文档是关于LSDYNA的关键词用户手册，版本971，日期为2012年4月3日。手册主要介绍了LSDYNA中的K文件，旨在帮助用户更好地理解和使用K文件。LSDYNA是由Livermore Software Technology Corporation (LSTC)开发的一款高级非线性有限元分析软件，广泛应用于动态事件模拟，如碰撞、爆炸等。K文件是LSDYNA中的一种输入文件，包含了模拟所需的各种控制参数、材料模型、边界条件和初始条件等信息。" 在LSDYNA中，K文件是关键的输入文件，它定义了求解问题的所有细节。K文件的结构通常包括以下几个部分： 1. **标题部分**：包含模拟的总体信息，如标题描述、作者、日期等，用于标识和记录模拟的元数据。 2. **控制参数**：设置求解器的行为，如时间步长、总模拟时间、求解算法（隐式、显式或混合）以及精度控制等。 3. **材料模型**：定义材料的物理属性，如弹性模量、泊松比、塑性行为、损伤和破坏模型等。LSDYNA支持多种复杂的材料模型，适应各种工程应用。 4. **几何描述**：描述模型的几何形状，可以是显式几何（通过节点和元素定义）或隐式几何（通过体素或表面定义）。 5. **边界条件和载荷**：设定模型的固定约束、速度边界、力载荷以及热载荷等。 6. **初始条件**：设置初始的位移、速度和加速度，以及初始温度分布等。 7. **接触和摩擦**：处理模型部件间的相互作用，包括接触定义、摩擦系数、滑动和粘附行为等。 8. **输出控制**：定义结果的输出频率和类型，如应力、应变、速度、加速度等。 9. **后处理**：配置如何生成结果文件，以便于后续的可视化和分析。 LSDYNA的K文件格式允许用户灵活地定制和调整模拟，以适应各种复杂的问题。正确理解和编写K文件是有效使用LSDYNA进行仿真分析的关键。同时，手册还提供了详细的语法说明和示例，帮助用户避免常见错误并优化模拟设置。此外，LSDYNA与其他LSTC产品，如LS-PrePost（前/后处理器）和LS-OPT（优化工具）一起，构成了一个强大的工程仿真解决方案。这些工具共同协助用户从建模、设置、求解到结果分析，完成整个工程仿真流程。在实际应用中，用户需要根据具体问题选择合适的材料模型、边界条件和求解策略，以确保模拟结果的准确性和可靠性。LSDYNA的K文件用户手册是学习和掌握这一过程的重要参考资料。

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TABLE OF CONTENTS 
 
14  LS-DYNA Version 971 
*INTERFACE_SPRINGBACK_OPTION1_OPTION2 ........................................................ 23-25 
*INTERFACE_SSI_{OPTION}_ID ........................................................................................ 23-30 
*INTERFACE_SSI_AUX_{OPTION} ................................................................................... 23-34 
*INTERFACE_SSI_AUX_EMBEDDED_{OPTION1}_{OPTION2} ................................... 23-35 
*INTERFACE_SSI_STATIC_{OPTION}_ID ....................................................................... 23-37 
*KEYWORD ............................................................................................................................................ 24-1 
*LOAD ...................................................................................................................................................... 25-1 
*LOAD_ALE_CONVECTION_{OPTION} ............................................................................ 25-3 
*LOAD_BEAM_OPTION ......................................................................................................... 25-5 
*LOAD_BLAST ........................................................................................................................ 25-7 
*LOAD_BLAST_ENHANCED .............................................................................................. 25-10 
*LOAD_BLAST_SEGMENT ................................................................................................. 25-15 
*LOAD_BLAST_SEGMENT_SET ....................................................................................... 25-16 
*LOAD_BODY_OPTION ........................................................................................................ 25-17 
*LOAD_BODY_GENERALIZED_OPTION ........................................................................ 25-22 
*LOAD_BODY_POROUS ..................................................................................................... 25-25 
*LOAD_BRODE ..................................................................................................................... 25-27 
*LOAD_DENSITY_DEPTH .................................................................................................. 25-29 
*LOAD_ERODING_PART_SET .......................................................................................... 25-31 
*LOAD_GRAVITY_PART_{OPTION} ............................................................................... 25-33 
*LOAD_HEAT_CONTROLLER .......................................................................................... 25-35 
*LOAD_HEAT_GENERATION_OPTION ........................................................................... 25-36 
*LOAD_MASK ....................................................................................................................... 25-38 
*LOAD_MOTION_NODE ..................................................................................................... 25-40 
*LOAD_MOVING_PRESSURE ........................................................................................... 25-42 
*LOAD_NODE_OPTION ........................................................................................................ 25-44 
*LOAD_REMOVE_PART_{OPTION} ................................................................................ 25-47 
*LOAD_RIGID_BODY .......................................................................................................... 25-49 
*LOAD_SEGMENT_{OPTION} ........................................................................................... 25-51 
*LOAD_SEGMENT_NONUNIFORM_{OPTION} ............................................................. 25-55 
*LOAD_SEGMENT_SET_{OPTION} ................................................................................... 25-58 
*LOAD_SEGMENT_SET_ANGLE ...................................................................................... 25-60 
*LOAD_SEGMENT_SET_NONUNIFORM_{OPTION} .................................................... 25-62 
*LOAD_SEISMIC_SSI_OPTION1_{OPTION2} .................................................................. 25-64 
*LOAD_SHELL_OPTION1_{OPTION2} .............................................................................. 25-68 
*LOAD_SPCFORC ................................................................................................................. 25-71 

TABLE OF CONTENTS 
 
LS-DYNA   Version 971  15 
*LOAD_SSA ............................................................................................................................ 25-72 
*LOAD_STEADY_STATE_ROLLING ............................................................................... 25-76 
*LOAD_STIFFEN_PART_{OPTION} ................................................................................. 25-80 
*LOAD_SUPERPLASTIC_FORMING ............................................................................... 25-82 
*LOAD_SURFACE_STRESS_{OPTION} ........................................................................... 25-88 
*LOAD_THERMAL_OPTION .............................................................................................. 25-90 
*LOAD_THERMAL_CONSTANT ....................................................................................... 25-91 
*LOAD_THERMAL_CONSTANT_ELEMENT_OPTION ................................................ 25-92 
*LOAD_THERMAL_CONSTANT_NODE ......................................................................... 25-93 
*LOAD_THERMAL_D3PLOT ............................................................................................. 25-94 
*LOAD_THERMAL_LOAD_CURVE ................................................................................. 25-95 
*LOAD_THERMAL_TOPAZ ............................................................................................... 25-96 
*LOAD_THERMAL_VARIABLE ........................................................................................ 25-97 
*LOAD_THERMAL_VARIABLE_BEAM_{OPTION} ...................................................... 25-99 
*LOAD_THERMAL_VARIABLE_ELEMENT_OPTION ............................................... 25-101 
*LOAD_THERMAL_VARIABLE_NODE ........................................................................ 25-102 
*LOAD_THERMAL_VARIABLE_SHELL_{OPTION} .................................................. 25-103 
*LOAD_VOLUME_LOSS ................................................................................................... 25-105 
*NODE ..................................................................................................................................................... 26-1 
*NODE_{OPTION} ................................................................................................................... 26-2 
*NODE_MERGE_SET ............................................................................................................. 26-4 
*NODE_MERGE_TOLERANCE ........................................................................................... 26-5 
*NODE_RIGID_SURFACE .................................................................................................... 26-6 
*NODE_SCALAR_{OPTION} ................................................................................................. 26-7 
*NODE_TRANSFORM............................................................................................................ 26-8 
*PARAMETER ....................................................................................................................................... 27-1 
*PARAMETER_{OPTION} ..................................................................................................... 27-2 
*PARAMETER_DUPLICATION ........................................................................................... 27-4 
*PARAMETER_EXPRESSION_{OPTION} ......................................................................... 27-5 
*PART ...................................................................................................................................................... 28-1 
*PART_{OPTION1}_{OPTION2}_{OPTION3}_{OPTION4}_{OPTION5} ......................... 28-2 
*PART_ADAPTIVE_FAILURE ........................................................................................... 28-12 
*PART_ANNEAL ................................................................................................................... 28-13 
*PART_COMPOSITE_{OPTION} ........................................................................................ 28-14 
*PART_DUPLICATE ............................................................................................................ 28-20 

TABLE OF CONTENTS 
 
16  LS-DYNA Version 971 
*PART_MODES ..................................................................................................................... 28-22 
*PART_SENSOR .................................................................................................................... 28-26 
*PART_MOVE ........................................................................................................................ 28-27 
*PERTURBATION ................................................................................................................................. 29-1 
*PERTURBATION_OPTION ................................................................................................... 29-2 
*RAIL ....................................................................................................................................................... 30-1 
*RAIL_TRACK ......................................................................................................................... 30-2 
*RAIL_TRAIN .......................................................................................................................... 30-7 
*RIGIDWALL ......................................................................................................................................... 31-1 
*RIGIDWALL_GEOMETRIC_OPTION_{OPTION}_{OPTION}}_{OPTION} ................. 31-2 
*RIGIDWALL_PLANAR_{OPTION}_{OPTION}_{OPTION} .......................................... 31-11 
*SECTION ............................................................................................................................................... 32-1 
*SECTION_ALE1D .................................................................................................................. 32-2 
*SECTION_ALE2D .................................................................................................................. 32-4 
*SECTION_BEAM_{OPTION} ................................................................................................ 32-5 
*SECTION_BEAM_AISC ...................................................................................................... 32-20 
*SECTION_DISCRETE ......................................................................................................... 32-22 
*SECTION_POINT_SOURCE .............................................................................................. 32-25 
*SECTION_POINT_SOURCE_MIXTURE ......................................................................... 32-28 
*SECTION_SEATBELT ........................................................................................................ 32-34 
*SECTION_SHELL_{OPTION} ............................................................................................ 32-35 
*SECTION_SOLID_{OPTION} ............................................................................................ 32-50 
*SECTION_SPH_{OPTION} ................................................................................................. 32-60 
*SECTION_TSHELL ............................................................................................................. 32-63 
*SENSOR ................................................................................................................................................. 33-1 
*SENSOR_CONTROL ............................................................................................................. 33-3 
*SENSOR_DEFINE_CALC-MATH ....................................................................................... 33-5 
*SENSOR_DEFINE_ELEMENT_{OPTION} ........................................................................ 33-7 
*SENSOR_DEFINE_FORCE .................................................................................................. 33-9 
*SENSOR_DEFINE_NODE_{OPTION} .............................................................................. 33-11 
*SENSOR_SWITCH ............................................................................................................... 33-13 
*SENSOR_SWITCH_CALC-LOGIC ................................................................................... 33-14 
*SET .......................................................................................................................................................... 34-1 
*SET_BEAM_{OPTION} ......................................................................................................... 34-3 

TABLE OF CONTENTS 
 
LS-DYNA   Version 971  17 
*SET_BEAM_ADD ................................................................................................................... 34-6 
*SET_BEAM_INTERSECT .................................................................................................... 34-7 
*SET_DISCRETE_{OPTION} ................................................................................................. 34-8 
*SET_DISCRETE_ADD ........................................................................................................ 34-11 
*SET_MULTI-MATERIAL_GROUP_LIST ....................................................................... 34-12 
*SET_NODE_{OPTION} ....................................................................................................... 34-14 
*SET_NODE_ADD_{OPTION} ............................................................................................. 34-18 
*SET_NODE_INTERSECT ................................................................................................... 34-20 
*SET_PART_{OPTION} ........................................................................................................ 34-21 
*SET_PART_ADD .................................................................................................................. 34-24 
*SET_SEGMENT_{OPTION} ................................................................................................ 34-26 
*SET_SEGMENT_ADD ......................................................................................................... 34-31 
*SET_SEGMENT_INTERSECT .......................................................................................... 34-32 
*SET_2D_SEGMENT_{OPTION} ........................................................................................ 34-33 
*SET_SHELL_{OPTION} ...................................................................................................... 34-35 
*SET_SHELL_ADD ............................................................................................................... 34-39 
*SET_SHELL_INTERSECT ................................................................................................. 34-40 
*SET_SOLID_{OPTION} ....................................................................................................... 34-41 
*SET_SOLID_ADD ................................................................................................................ 34-44 
*SET_SOLID_INTERSECT .................................................................................................. 34-45 
*SET_TSHELL_{OPTION} ................................................................................................... 34-46 
*TERMINATION ................................................................................................................................... 35-1 
*TERMINATION_BODY ........................................................................................................ 35-2 
*TERMINATION_CONTACT ............................................................................................... 35-3 
*TERMINATION_CURVE ..................................................................................................... 35-4 
*TERMINATION_DELETED_SHELLS_{OPTION} ........................................................... 35-5 
*TERMINATION_DELETED_SOLIDS_{OPTION} ............................................................ 35-6 
*TERMINATION_NODE ........................................................................................................ 35-7 
*TERMINATION_SENSOR ................................................................................................... 35-8 
*TITLE ..................................................................................................................................................... 36-1 
*USER ...................................................................................................................................................... 37-1 
*USER_INTERFACE_OPTION .............................................................................................. 37-1 
*USER_LOADING ................................................................................................................... 37-3 
*USER_LOADING_SET.......................................................................................................... 37-4 
RESTART INPUT DATA ...................................................................................................................... 38-1 

TABLE OF CONTENTS 
 
18  LS-DYNA Version 971 
*CHANGE_OPTION ................................................................................................................. 38-3 
*CONTROL_DYNAMIC_RELAXATION .......................................................................... 38-14 
*CONTROL_SHELL .............................................................................................................. 38-16 
*CONTROL_TERMINATION ............................................................................................. 38-18 
*CONTROL_TIMESTEP ...................................................................................................... 38-19 
*DAMPING_GLOBAL .......................................................................................................... 38-20 
*DATABASE_OPTION ........................................................................................................... 38-21 
*DATABASE_BINARY_OPTION ......................................................................................... 38-23 
*DELETE_OPTION ................................................................................................................ 38-24 
*INTERFACE_SPRINGBACK_LSDYNA ........................................................................... 38-26 
*RIGID_DEFORMABLE_OPTION ...................................................................................... 38-28 
*RIGID_DEFORMABLE_CONTROL ................................................................................ 38-29 
*RIGID_DEFORMABLE_D2R ............................................................................................. 38-30 
*RIGID_DEFORMABLE_R2D ............................................................................................. 38-31 
*STRESS_INITIALIZATION_{OPTION} ........................................................................... 38-32 
*TERMINATION_OPTION ................................................................................................... 38-34 
*TITLE ..................................................................................................................................... 38-36 
REFERENCES ........................................................................................................................................ 39-1 
APPENDIX A:  USER DEFINED MATERIALS ................................................................................. 40-1 
APPENDIX B:  USER DEFINED EQUATION OF STATE ............................................................... 41-1 
APPENDIX C:  USER DEFINED ELEMENT INTERFACE FOR SOLIDS AND SHELLS .......... 42-1 
APPENDIX D:  USER DEFINED AIRBAG SENSOR ........................................................................ 43-1 
APPENDIX E:  USER DEFINED SOLUTION CONTROL ............................................................... 44-1 
APPENDIX F:  USER DEFINED INTERFACE CONTROL ............................................................. 45-1 
APPENDIX G:  USER DEFINED INTERFACE FRICTION AND CONDUCTIVITY .................. 46-1 
APPENDIX H:  USER DEFINED THERMAL MATERIAL MODEL ............................................. 47-1 
APPENDIX I:  OCCUPANT SIMULATION INCLUDING THE COUPLING TO PROGRAMS CAL3D 
AND MADYMO ...................................................................................................................................... 48-1 
INTRODUCTION ..................................................................................................................... 48-1 
THE LS-DYNA/OCCUPANT SIMULATION PROGRAM LINK ...................................... 48-1 
DUMMY MODELING ............................................................................................................. 48-3 
AIRBAG MODELING ............................................................................................................. 48-4 
KNEE BOLSTER ...................................................................................................................... 48-5 