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Workshop 2.1ANSYS Mechanical BasicsWorkshop Supplement •The first workshop is extensively documented. As this course progresses, students will become more familiar with basic Workbench Mechanical functionality (menu locations etc.), thus subsequent workshops will contain less details.•Throughout these workshops menu paths are documented as: “First pick > Second pick > etc.”.•Workshops begin with a goals section followed by an assumptions section.Workshop Supplement •Using the Stress Wizard, set up and solvea structural model for stress, deflectionand safety factor.•Problem statement:–The model consists of a Parasolid filerepresenting a control box cover (seefigure). The cover is intended to be used inan external pressure application (1 Mpa/145psi).–The cover is to be made from aluminumalloy.–Our goal is to verify that the part willfunction in its intended environment.Workshop Supplement •We will represent the constrains onthe counter bores, bottom contactarea and inner sides using frictionlesssupports.–Frictionless supports place a normalconstraint on an entire surface.Translational displacement is allowedin all directions except into and out ofthe supported plane. Since we wouldexpect frictional forces to at contactareas this is a conservative approach.Workshop Supplement •Loads: the load consists of a 1 MPa pressure applied to the 17 exterior surfaces of the cover.Workshop Supplement •Open the Project page.•From the “Units” menu verify:–Project units are set to “US Customary (lbm, in, s, F, A, lbf, V).–“Display Values in Project Units” is checked (on).Workshop Supplement1.From the Toolbox choosecreate a Static Structuralsystem (drag/drop or RMB).2.RMB in the Geometry cell andImport Geometry. Browse tothe file “Cap_fillets.x_t”.Workshop Supplement3.Double click the “Model” cell to open theMechanical application.4.When the Mechanical application opens themodel will display in the graphics window andthe Mechanical Application Wizard displayson the right.When Mechanicalstarts if the Wizardis not displayed,use the icon toopen it.Workshop Supplement5.Set the units system:•From the main menu go to “Units > Metric (mm,kg, N, s, mV, mA).Workshop Supplement6.Select a suitable material for the part:a.From the Mechanical Wizard choose “Verify Material”b.Notice the callout box indicates Engineering Data isaccessible from the WB2 interface (Project Schematic).c.Return to the Project schematic window and double click“Engineering Data” to access the material properties.Workshop Supplement7.With General Materialshighlighted click the ‘+’ next to“Aluminum Allow” to add thismaterial to the current project.8.Return to the Project.•Notice the Model cell indicates arefresh is necessary.9.Refresh the Model cell (RMB),then return to the Mechanicalwindow.Workshop Supplement 10.Highlight “Part 1” and click the“Material > Assignment” field tochange the material property toaluminum alloy.Workshop Supplement11.Insert Loads:a.Select “Insert Structural Loads ” from the Wizardb.Follow the call out box to insert a “Pressure ” loadc.The tree will now include a Pressure load in the “Static Structural ”environment branchc.Workshop Supplement12.Apply the load to geometry:a)Highlight one of the outer faces of the part.b)Use the “Extend to Limits” icon to select the remaining 16 faces (total 17 facesselected).c)Click “Apply” to accept the faces.d)Enter a “Magnitude”of 1MPa.a.b.Workshop Supplement 13. Apply supports to constrain the part:a.Select “Insert Supports” from the Wizard.b.Follow the callout box to insert a “Frictionless Support”.c.“Apply”it to the 4 counter bore surfaces of the part.b.Workshop Supplement14.Repeat Steps 13.a. and 13.b. to insert a“Frictionless Support” on the inner surfacesof the bottom recess (use extend to limitsafter selecting one of the inner surfaces.15.Repeat Steps 13.a. and 13.b. to insert a“Frictionless Support” on the lip surface atthe bottom of the recess.Workshop Supplement16.From the Mechanical Wizard request:a)Insert Structural Results (the call out will point to the Solution toolbar).b)Deformation > Total.c)Stress > Equivalent (von-Mises).d)Tools > Stress Tool.Note the Stress Tool detail allows 4 different configurations (explained later). For this workshop we will leave the tool specified as “Max Equivalent Stress ”theory.Workshop Supplement17.Solve the model:a.Select “Solve” from the Wizard.b.Follow the callout box and click on “Solve”.•Note how clicking on “Solve” in the Wizard does not automatically start solving the model but instead, points out the “Solve” icon to the user. Alternatively, you could right click on any branch in the “outline” and choose “Solve”a.b.Workshop Supplement18.View the results:a.Click “View Results ” from the Wizardb.Follow the callout box to where the results are available under the “Solution ”branchb.Workshop Supplement •Plotting a model’s deformation often provides a “reality check” in structural analysis. Verifying the general nature (direction and amount) of deflection can help avoid obvious mistakes in model setup. Animations are often used as well.Workshop Supplement •After reviewing stress results expand the safety tool and plot safety factor. Notice the failure theory selected predicts a minimum safety factor of just over 1.Workshop Supplement 19.Create an html report:a.First choose the graphical items you wishto include in your report by highlighting thebranches and orienting the plot (this is yourchoice).b.Next, insert a “Figure ” from the toolbar.c.Click the “Report Preview ” tab to generatethe report.c.Workshop SupplementNotes on Figures:•Figures are not limited to results items. Adding a plot of the environment branch, for example, will include an image of model boundary conditions in the Report.•Figures are independent. You may set up individual figures and have their orientation, zoom level, etc. retained regardless of the active model orientation or other figures.•Individual branches can have multiple figures associated with them.。
Workbench -Mechanical Introduction第六章热分析概念Training Manual •本章练习稳态热分析的模拟，包括：A.几何模型B B.组件-实体接触C.热载荷D.求解选项E E.结果和后处理F.作业6.1本节描述的应用般都能在ANSYS DesignSpace Entra或更高版本中使用，除了•本节描述的应用一般都能在ANSYS DesignSpace EntraANSYS Structural提示：在S S热分析的培训中包含了包括热瞬态分析的高级分析•ANSYSTraining Manual稳态热传导基础•对于一个稳态热分析的模拟，温度矩阵{T}通过下面的矩阵方程解得：()[]{}(){}T Q T T K =•假设：–在稳态分析中不考虑瞬态影响[K]可以是个常量或是温度的函数–[K] 可以是一个常量或是温度的函数–{Q}可以是一个常量或是温度的函数稳态热传导基础Training Manual •上述方程基于傅里叶定律：•固体内部的热流（Fourier’s Law）是[K]的基础；•热通量、热流率、以及对流在{Q}为边界条件；•对流被处理成边界条件，虽然对流换热系数可能与温度相关•在模拟时，记住这些假设对热分析是很重要的。
A. 几何模型Training Manual •热分析里所有实体类都被约束：–体、面、线•线实体的截面和轴向在DesignModeler中定义•热分析里不可以使用点质量（Point Mass）的特性•壳体和线体假设：–壳体：没有厚度方向上的温度梯度–线体：没有厚度变化，假设在截面上是一个常量温度•但在线实体的轴向仍有温度变化… 材料特性Training Manual •唯一需要的材料特性是导热性（Thermal Conductivity）•Thermal Conductivity在Engineering Data 中输Engineering Data入•温度相关的导热性以表格形式输入若存在任何的温度相关的材料特性，就将导致非线性求解。
