TrueGrid和LS-DYNA动力学数值计算详解

本书分为两大部分，第壹部分详细讲解了通用参数化网格划分工具 TrueGrid3.13 的使用方法和注意事项，包括 TrueGrid 的基本操作、常用命令详解、建模范例和软件接口等。书中给出了许多建模范例的命令流，建模过程简洁明了，建立的模型网格质量很高。第二部分全面讲解了通用动力学多物理场分析程序 LS-DYNA（版本 10.1）的入门基础知识、侵彻计算、爆炸及其作用分析、裂纹扩展计算、热学计 算、隐式分析、重启动分析、流固耦合、SPH 方法、EFG 方法以及*新的 S-ALE、ICFD、CESE、SPG、Peridynamics、EM、DEM 等新算法，并结合工程应用给出了许多计算算例。对于每个精心准备的算例，详细解释了 TrueGrid 建模过程、相关LS-DYNA 关键字的含义和使用方法及注意事项。全部算例建模步骤简明扼要，参数设置合理，计算结果准确可信。扫描封底二维码可免费下载书中代码。 本书适合理工科院校的大学教师、本科高年级学生和研究生作为有限元课程学习教材，也可以作为工程技术人员的力学分析和产品开发设计的参考手册。通过本书的学习，读者可大幅提高 TrueGrid 和 LS-DYNA 的使用水平及工程分析能力。

作者在总装备部21基地技术部、北京理工国方软件公司、安世亚太（北京）科技有限公司、北京航天长征飞行器研究所等单位工作多年，具有丰富的有限元分析经验，并精通各种相关软件。

前言 第一部分 TrueGrid 软件网格划分指南 第 1 章 TrueGrid 基本操作······················ 1 1.1 TrueGrid 运行模式 ·························· 2 1.2 TrueGrid 设置 ·································· 3 1.3 TrueGrid 快速入门 ·························· 3 1.4 TrueGrid 基本概念 ························ 14 1.5 生成网格的初始命令 ···················· 16 1.6 TrueGrid 建模步骤 ························ 18 1.7 鼠标和键盘快捷键的功能 ············ 18 1.8 显示命令 ······································· 19 1.9 投影和附着 ··································· 19 1.10 蝴蝶形网格划分方法 ·················· 20 1.11 block 和 cylinder 命令练习 ········· 22 1.12 合并 ············································· 26 1.13 回退 ············································· 27 1.14 历史窗口 ····································· 27 1.15 命令执行顺序 ······························ 27 1.16 使用 TrueGrid 软件的其他注意事项·················· 28 1.17 参考文献 ····································· 29 第 2 章 TrueGrid 常用命令详解 ············ 30 2.1 部件（PART）命令 ······················ 30 2.2 几何命令 ······································· 51 2.3 合并命令 ······································· 73 2.4 全局命令 ······································· 82 2.5 输出命令 ····································· 110 2.6 参考文献 ····································· 112 第 3 章 TrueGrid 建模范例·················· 113 3.1 钢壳结构水下爆炸模型 ·············· 113 3.2 炸药自由场爆炸二维轴对称模型 ·············································· 114 3.3 炸药自由场爆炸三维 1/8 对称模型 ·············································· 115 3.4 刚性弹体三维全模型 ·················· 116 3.5 装药弹体二维轴对称模型 ·········· 118 3.6 装药弹体三维 1/4 对称模型 ······· 119 3.7 二维轴对称多层靶模型 ·············· 121 3.8 半无限靶三维 1/4 对称模型 ······· 122 3.9 复合靶三维 1/2 对称模型 ··········· 124 3.10 带 20°倾斜角的靶标三维 1/2对称模型 ···································· 125 3.11 带中心孔的靶标三维1/2对称模型 ············································· 129 3.12 射流侵彻二维轴对称模型 ········ 129 3.13 爆炸成形弹丸三维 1/4 对称模型 ············································ 131 3.14 破片战斗部模型 ························ 132 3.15 钢筋混凝土模型 ························ 136 3.16 SPH 模型 ··································· 139 3.17 远场水下爆炸声固耦合模型 ···· 139 3.17.1 球形水域模型 ·························· 140 3.17.2 椭球形水域模型 ······················· 141 3.18 行星齿轮模型 ···························· 144 3.19 自行车车轮模型 ························ 145 3.20 随机块石层模型 ························ 147 3.21 参考文献 ···································· 148 第 4 章 TrueGrid 支持的分析软件和软件接口 ··································· 149 4.1 TrueGrid 软件与 AUTODYN 软件接口 ·············································· 149 4.2 TrueGrid 软件与 LS-DYNA 软件接口 ·············································· 149 4.3 TrueGrid 建模与 LS-DYNA 计算直通算例 ······································ 150 4.4 参考文献 ······································ 161 第二部分 LS- -DYNA 动力学数值计算详解 第 5 章 LS- -DYNA 软件简介 ··············· 162 5.1 LS-DYNA 基本功能 ·················· 162 5.2 LS-DYNA 最新发展 ·················· 167 5.3 LS-DYNA 资源网站 ·················· 172 5.4 参考文献 ····································· 172 第 6 章 LS- -DYNA 入门基础知识 ········ 173 6.1 单位制 ········································· 173 6.1.1 力学单位 ··································· 173 6.1.2 热学单位 ··································· 173 6.1.3 电磁学单位 ······························· 174 6.2 LS-DYNA 关键字输入数据 格式 ·············································· 175 6.3 LS-DYNA 主要关键字简要 介绍 ·············································· 178 6.4 LS-DYNA 常用命令行语法 ······· 185 6.5 求解感应控制开关 ······················ 186 6.6 文件系统 ····································· 188 6.7 重启动分析 ································· 189 6.8 单精度和双精度 ·························· 190 6.9 隐式分析和显式分析 ·················· 190 6.10 接触 ··········································· 191 6.11 Lagrangian/Euler/ALE 算法 ······ 199 6.11.1 三类算法简介 ·························· 199 6.11.2 Euler/ALE 算法常用关键字 ······· 200 6.11.3 PART 和 AMMG 的区别 ··········· 213 6.12 流固耦合算法 ···························· 213 6.13 关键字文件的分割和编辑 ········ 218 6.14 批处理运行 LS-DYNA ············· 219 6.15 参考文献 ··································· 220 第 7 章 侵彻计算 ··································· 221 7.1 泰勒杆撞击刚性墙计算 ·············· 221 7.2 弹体侵彻多层楼板计算 ·············· 225 7.3 楔形体入水二维计算 ·················· 243 7.4 参考文献 ····································· 250 第 8 章 爆炸及其作用计算 ··················· 251 8.1 水中爆炸气泡脉动一维计算 ······ 251 8.2 爆炸成形弹丸侵彻钢板二维ALE 计算 ····································· 260 8.3 空中爆炸二维到三维映射计算 ·· 266 8.4 含铝炸药水下冲击起爆二维计算 ·············································· 274 8.5 参考文献 ······································ 285 第 9 章 裂纹扩展计算 ··························· 286 9.1 采用节点分离方法模拟钢球撞击铝板 ······································ 287 9.2 用单元失效删除和带有损伤的本构模型方法模拟弹体侵彻混凝土 ·························· 290 9.3 用 SPH 方法和带有损伤的本构 模型方法模拟水射流冲蚀煤层 ··· 296 9.4 钢板裂纹扩展二维XFEM 计算 ··· 300 9.5 金属切削 SPG 计算 ···················· 307 9.6 爆炸作用下玻璃破碎的近 场动力学计算 ······························ 314 9.7 参考文献 ····································· 323 第 10 章 热学计算 ································· 324 10.1 热学计算基础 ···························· 324 10.2 长杆瞬态热传导计算 ················ 327 10.3 厚板稳态对流计算 ···················· 331 10.4 空心柱体热应力计算 ················ 335 10.5 厚板辐射传热计算 ···················· 340 10.6 水成冰相变计算 ························ 343 10.7 参考文献 ···································· 346 第 11 章 隐式分析 ································· 347 11.1 隐式分析基础 ···························· 347 11.2 简支方板特征值分析 ················ 353 11.3 简支方板受力振动计算 ············ 356 11.4 轴向加载薄壁壳体屈曲分析 ····· 361 11.5 金属切削 EFG 计算 ·················· 365 11.6 参考文献 ···································· 373 第 12 章 S- -ALE/ICFD/CESE/EM/ DEM 算法介绍 ······················· 374 12.1 水下爆炸 S-ALE 计算 ·············· 374 12.2 绕柱流 ICFD 计算 ····················· 384 12.3 激波管 CESE 计算 ···················· 388 12.4 涡电流 EM 计算 ························ 393 12.5 电磁轨道炮发射 EM 计算 ········ 397 12.6 料仓落料 DEM 计算 ················· 405 12.7 参考文献 ···································· 410 第 13 章 重启动分析 ····························· 411 13.1 小型重启动分析 — SHPB 计算 ············································ 412 13.2 完全重启动分析 — SHPB 连续打击计算 ···························· 417 13.3 参考文献 ···································· 421 第 14 章 若干计算问题的解决方法······ 422 14.1 求解算法的选择 ························ 422 14.2 关于计算结果的准确性和可 信度的讨论 ································ 422 14.3 LS-DYNA 求解时间的决定 因素 ·