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Add Gravity Load Example (C#)

This example shows how to add a gravity load to a static study.

//------------------------------------------------------------------------------
// Preconditions:
// 1. Add the SOLIDWORKS Simulation as an add-in
//    (in SOLIDWORKS, click Tools > Add-ins > SOLIDWORKS Simulation,
//     and click OK).
// 2. Add the SOLIDWORKS Simulation primary interop assembly as 
//    a reference (in the IDE's Project Explorer, right-click
//    the project name, click Add Reference, click the Browse tab,
//    navigate to install_dir\api\redist\CLR2
//    click SolidWorks.Interop.cosworks.dll, and click OK).
// 3. Verify that the specified model document exists.
// 4. Open the Immediate window.
//
// Postconditions:
// 1. Opens the document.
// 2. Activates Ready - 8 plies.
// 3. Deletes two pressure loads from Ready - 8 plies.
// 4. Adds the Gravity-1 load to Ready - 8 plies.
// 5. Prints the Gravity-1 properties to the Immediate window.
// 6. Meshes the part.
// 7. Sets the solver type.
// 8. Analyzes Ready - 8 plies.
// 9. Inspect the Immediate window, the Simulation study tree,
//    and the graphics area.
//
// NOTE: Because this part document is used elsewhere, do not save any changes.
//-----------------------------------------------------------------------------
using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using SolidWorks.Interop.cosworks;
using System.Runtime.InteropServices;
 
namespace AddGravityLoad_CSharp.csproj
{
    partial class SolidWorksMacro
    {
 
        public void Main()
        {
            ModelDoc2 Part = default(ModelDoc2);
            string fileName = null;
            int errors = 0;
            int warnings = 0;
            int errCode = 0;
            int longstatus = 0;
            CosmosWorks COSMOSWORKS = default(CosmosWorks);
            CwAddincallback CWAddinCallBack = default(CwAddincallback);
            CWModelDoc ActDoc = default(CWModelDoc);
            CWStudyManager StudyMngr = default(CWStudyManager);
            CWStudy Study = default(CWStudy);
            CWMesh mesh = default(CWMesh);
            CWStaticStudyOptions StaticOptions = default(CWStaticStudyOptions);
            CWLoadsAndRestraintsManager lrMgr = default(CWLoadsAndRestraintsManager);
            CWGravity Gravity = default(CWGravity);
            object dispEntity = null;
            string str1 = null;
            object var1 = null;
            double xval = 0;
            double yval = 0;
            double zval = 0;
 
            const double MeshEleSize = 1.4769;
            const double MeshTol = 0.073847;
 
            if (swApp == null)
                return;
 
            fileName = "C:\\Program Files\\SOLIDWORKS Corp\\SOLIDWORKS\\samples\\tutorial\\api\\tjoint.sldprt";
            Part = swApp.OpenDoc6(fileName, (int)swDocumentTypes_e.swDocPART, 1, ""ref errors, ref warnings);
 
            CWAddinCallBack = (CwAddincallback)swApp.GetAddInObject("SldWorks.Simulation");
            COSMOSWORKS = CWAddinCallBack.CosmosWorks;
 
            ActDoc = COSMOSWORKS.ActiveDoc;
 
            StudyMngr = ActDoc.StudyManager;
            StudyMngr.ActiveStudy = 1;
            Study = StudyMngr.GetStudy(StudyMngr.ActiveStudy);
 
            //Use top plane for gravity direction
            str1 = "64,31,0,0,1,0,0,0,255,254,255,0,0,0,0,0,3,0,0,0";
            StringtoArray(str1, ref var1);
            dispEntity = Part.Extension.GetObjectByPersistReference3((var1), out longstatus);
 
            lrMgr = Study.LoadsAndRestraintsManager;
 
            //Delete pressure loads
            lrMgr.DeleteLoadsAndRestraints("Pressure-1");
            lrMgr.DeleteLoadsAndRestraints("Pressure-2");
 
            //Add gravity load
            Gravity = lrMgr.AddGravity(dispEntity, out errCode);
            Gravity.GravityBeginEdit();
            Gravity.GetGravitationalAcclerationValues(out xval, out yval, out zval);
            Debug.Print("Gravity acceleration:");
            Debug.Print("  x direction: " + xval);
            Debug.Print("  y direction: " + yval);
            Debug.Print("  Z direction: " + zval);
            Debug.Print("  Units as defined in swsUnitSystem_e: " + Gravity.Unit);
            Gravity.GravityEndEdit();
 
            //Mesh
            mesh = Study.Mesh;
            mesh.MesherType = 0;
            mesh.Quality = 0;
            errCode = Study.CreateMesh(0, MeshEleSize, MeshTol);
 
            StaticOptions = Study.StaticStudyOptions;
            StaticOptions.SolverType = 2;
 
            //Run analysis
            errCode = Study.RunAnalysis();
 
 
        }
 
 
        public void StringtoArray(string inputSTR, ref object varEntity)
        {
            string[] PIDArray = null;
            byte[] PID = null;
            int i;
 
            // Parse string into an array
            PIDArray = inputSTR.Split(new char[] { ',' });
 
            //Convert string array to byte array
            int sizeArray = PIDArray.Length;
            PID = new byte[sizeArray];
            for (i = 0; i < PIDArray.Length; i++)
            {
 
                PID[i] = Convert.ToByte(PIDArray[i]);
            }
            varEntity = PID;
        }
 
 
        /// <summary>
        /// The SldWorks swApp variable is pre-assigned for you.
        /// </summary>
 
        public SldWorks swApp;
 
    }
}

 



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