OptiStruct-Linear-Analysis-CN

InnovationIntelligence®OptiStruct线性分析讲师姓名Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.培训内容简介线性静力分析模态分析线性屈曲分析惯性释放分析Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.第一章简介HyperWorks概述OptiStruct概述Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.FlexibleanswersforeachindustryverticalAPlatformtoCaptureProcessesEnterpriseSolutionsEfficientandreliablesolversolutionsDesignandoptimizenon-intuitivesolutionsFullyexercisedesignsMinimizetimespentmodelingandreportingAutomaterepetitivetasksProductdesigndecisionsupporttechnologyPayforwhatyouusetokensPartnerproducts“play”withoutincrementalcostSimplified,singlevendorexperiencedrivesvalue关于HyperWorksCopyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.关于HyperWorks建模分析优化结果可视化报告生成性能数据管理Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.什么是OptiStruct?OptiStruct是新一代的隐式有限元求解器，可以求解线性静力学和动力学问题，瞬态动力学及多体动力学问题，耐久性和NVH（Noise(噪声),Vibration(振动)和Harshness(声振粗糙度)），帮助企业将更创新的产品快速的推入市场。Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.OptiStruct构成Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.OptiStruct线性分析有限元分析基本分析功能线性静力分析模态分析线性屈曲分析稳态热应力分析高级分析功能频率响应分析(FRF)直接法模态法随机响应分析瞬态响应分析直接法模态法基于傅里叶变换的瞬态响应分析直接法模态法非线性接触分析声学分析（结构和流体）疲劳分析（应力疲劳和应变疲劳）Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.优化分析TopologyShapeFree-shapeSizeFree-sizeTopographyOptimization设计流程求解器中立集成有限元求解器概念优化工具DesignFineTuningGauge9&10Gauge1,2&3Gauge4Gauge5Gauge6Gauge7Gauge11,12&13Gauge14&15DOE近似模型随机性研究Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.OptiStruct流程在HyperMesh中进行前处理MODELNodes&ElementsLOADSMomentsForces…RunControlsSubcasesOutputRequests…CONSTRAINTSSPC,MPCMaterialsPropertiesOptiStruct模型检查求解文本格式的求解器输入文件Fem文件其它输出请求OtherASCIIresultfiles警告，错误及运行细节OutfileLogfile二进制结果文件H3dfileResfileCopyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.分析思路系统或组件受有何种载荷？载荷是静态的还是动态的？载荷路径是什么？设计要求有哪些？（应力，位移，应变，寿命等等)预计高应力会在哪些地方出现？可接受的最大应力值为多少？是线性问题还是非线性问题？如何验证有限元分析结果的正确性？Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.分析思路Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.第2章——线性静力分析什么是线性静力分析？结构模型的定义如何开展静力分析实例1：简单梁分析实例2：支架分析Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.线性静力分析•按力学观点我们定义静力状态为系统在受到平衡力和力矩作用时保持平衡的一种状态。•系统所受到的载荷位移边界条件:•力，力矩，温度，单点约束，多点约束……•线性分析的前提假设:•变形在弹性范围内•应力应变关系为线性函数Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.线性静态分析fKxK:整体刚度矩阵x：待求的节点位移向量f:作用在结构上的外力向量例子:Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.线性静态分析1–有限元模型:LAELAELAELAEK2–单元刚度矩阵:74.65974.65974.65974.659100210*16.314100210*16.314100210*16.314100210*16.3141K47.8247.8247.8247.82200210*54.78200210*54.78200210*54.78200210*54.782K47.8247.820347.8247.8274.65974.6592074.65974.6591321GK3–整体刚度矩阵:1000f321xxxx4–力和位移:Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.线性静态分析5–整体方程:6–去除自由度约束:100047.8247.82047.8221.74274.659074.65974.659321xxx10047.8247.8247.8221.74232xx1364.00152.032xx7–求解方程:应变mmmmLxxLL/10*52.110000152.041121mmmmLxxLL/10*06.62000152.01364.042232应力GPaE032.0210*10*52.1411GPaE127.0210*10*06.6422力KNAf1016.314*032.0111KNAf1054.78*127.0222Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.模型定义输入/输出部分工况信息部分•定义荷载信息（子步，加载步骤）•(目标和约束的定义）BulkData部分•（优化问题）设计变量响应约束•优化参数(DOPTPRM)•有限元模型Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.模型定义输入/输出部分1.ASCIIoutput(.out;.stat;.hist;.sh;.desvar;.prop;.hgdata;.grid;.oss;.HM.comp.cmf;.HM.ent.cmf)2.HTMLReports(.html;_frames.html;_menu.html;.shuf.html)3.Modelresults(.res;.h3d;_des.h3d;_s#.h3d4.HVsessionfile(.mvw;_hist.mvw)Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.I/O部分I/O部分Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.输入输出部分输入输出部分控制：•输入，输出，临时文件的位置和文件名称•运行的类型（分析，检查，重启动运行）•分析或优化的整体运行情况•输出的类型，格式及输出频率I/O选项的一些类型分类•输出格式控制:FORMAT,OUTPUT•运行控制:ANALYSIS,CHECK,CPU,NPROC,RESTART,SYSSSETTING•文件名，头文件，位置:EIGVNAME,INCLUDE,INFILE,LOADLIB,OUTFILE…•分析输出:ACCELERATION,CSTRAIN,CSTRESS,DISPLACEMENT,ELFORCE…•优化输出:DENSITY,DENSRES,DESHIS,HISOUT,PROPERTY,RESPRINT…•其他输出:ECHO,ECHOON,ECHOOFF,DMIGNAME,MODEL…Copyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.输入输出部分示例:$TITLE=OptiStructAnalysisSUBTITLE=Simulation$ANALYSISDISPLACEMENT(PUNCH)=ALLECHOFORMATH3DFORMATHMSTRAIN=ALLSTRESS=ALLCopyright©2012AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.工况控制部分工况信息Copyright©2012AltairEngineering,Inc.ProprietaryandCo