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材料力学电算大作业 题目名称：压杆稳定性分析作者班号：1102201作者学号：1110200301作者姓名： 指导教师：王春香完成时间：2013.06.20评语：成绩（满分10分）： 签名： 时间：一、题目根据材料参数和工作要求，分析压杆稳定性。二、程序流程1、打开界面，选择截面；2、出现数据输入对话框，输入数据； 3、点击“开始计算”； 4、得出临界应力、校核结果及临界应力总图；5、记录数据。三、程序使用输入项：（1）截面参数：圆截面直径d圆环截面外直径D、内直径d矩形截面高h、宽b工字形截面对形心轴的惯性矩Iy、Iz及截面面积A（2）材料参数：弹性模量E，屈服点p，比例极限s，线性经验公式系数a和b，压杆长度l，长度系数、（3）工作压力P及工作安全系数n输出项：（1）临界应力图（2）临界应力cr（3）校核结果四、程序截图五、程序代码1、Form0Private Sub Command1_Click()Form0.HideForm1.ShowEnd SubPrivate Sub Form_Load()End Sub2、Form1Private Sub Command1_Click()Form1.HideForm2.ShowEnd SubPrivate Sub Command2_Click()Form1.HideForm3.ShowEnd SubPrivate Sub Command3_Click()Form1.HideForm4.ShowEnd SubPrivate Sub Command4_Click()Form1.HideForm5.ShowEnd SubPrivate Sub Command5_Click()End SubPrivate Sub Form_Load()End Sub3、Form2If r = rp Thent = pi 2 * e / (r 2 * n)Text11.Text = tIf p / s = rs Thent = (a - b * r) / nText11.Text = tIf p / s = t ThenText12.Text = 满足稳定条件ElseText12.Text = 不满足稳定条件End IfElseText11.Text = Text12.Text = 这是一个强度问题End IfDim y As DoublePicture1.ClsPicture1.ScaleMode = 0Picture1.Scale (-10, 300)-(200, -10)Picture1.DrawWidth = 1Picture1.Line (0, 0)-(200, 0), RGB(0, 0, 255)Picture1.Line (0, 0)-(0, 300), RGB(0, 0, 255)For x = 0 To rs Step 0.01y = tsPicture1.PSet (x, y), RGB(255, 0, 0)Next xFor x = rs To rp Step 0.01y = a - b * xPicture1.PSet (x, y), RGB(255, 0, 0)Next xFor x = rp To 300 Step 0.01y = pi 2 * e / x 2Picture1.PSet (x, y), RGB(255, 0, 0)Next xEnd SubPrivate Sub Form_Load()End Sub4、Form3If p / s = rs Thent = (a - b * r) / nText11.Text = tIf p / s = t ThenText12.Text = 满足稳定条件ElseText12.Text = 不满足稳定条件End IfElseText11.Text = Text12.Text = 这是一个强度问题End IfDim y As DoublePicture1.ClsPicture1.ScaleMode = 0Picture1.Scale (-10, 300)-(200, -10)Picture1.DrawWidth = 1Picture1.Line (0, 0)-(200, 0), RGB(0, 0, 255)Picture1.Line (0, 0)-(0, 300), RGB(0, 0, 255)For x = 0 To rs Step 0.01y = tsPicture1.PSet (x, y), RGB(255, 0, 0)Next xFor x = rs To rp Step 0.01y = a - b * xPicture1.PSet (x, y), RGB(255, 0, 0)Next xFor x = rp To 300 Step 0.01y = pi 2 * e / x 2Picture1.PSet (x, y), RGB(255, 0, 0)Next xEnd SubPrivate Sub Command2_Click()Form3.HideForm1.ShowEnd SubPrivate Sub Form_Load()End Sub5、Form4If p / s = rs Thent = (a - b * r) / nText11.Text = tIf p / s = t ThenText12.Text = 满足稳定条件ElseText12.Text = 不满足稳定条件End IfElseText11.Text = Text12.Text = 这是一个强度问题End IfDim y As DoublePicture1.ClsPicture1.ScaleMode = 0Picture1.Scale (-10, 300)-(200, -10)Picture1.DrawWidth = 1Picture1.Line (0, 0)-(200, 0), RGB(0, 0, 255)Picture1.Line (0, 0)-(0, 300), RGB(0, 0, 255)For x = 0 To rs Step 0.01y = tsPicture1.PSet (x, y), RGB(255, 0, 0)Next xFor x = rs To rp Step 0.01y = a - b * xPicture1.PSet (x, y), RGB(255, 0, 0)Next xFor x = rp To 300 Step 0.01y = pi 2 * e / x 2Picture1.PSet (x, y), RGB(255, 0, 0)Next xEnd SubPrivate Sub Command2_Click()Form3.HideForm1.ShowEnd SubPrivate Sub Form_Load()End Sub6、Form5If p / s = rs Thent = (a - b * r) / nText11.Text = tIf p / s = t ThenText12.Text = 满足稳定条件ElseText12.Text = 不满足稳定条件End IfElseText11.Text = Text12.Text = 这是一个强度问题End IfDim y As DoublePicture1.ClsPicture1.ScaleMode = 0Picture1.Scale (-10, 300)-(200, -10)Picture1.DrawWidth = 1Picture1.Line (0, 0)-(200, 0), RGB(0, 0, 255)Picture1.Line (0, 0)-(0, 300), RGB(0, 0, 255)For x = 0 To rs Step 0.01y = tsPicture1.PSet (x, y), RGB(255, 0, 0)Next xFor x = rs To rp Step 0.01y = a - b * xPicture1.PSet (x, y), RGB(255, 0, 0)Next xFor x = rp To 300 Step 0.01y = pi 2 * e / x 2Picture1.PSet (x, y), RGB(255, 0, 0)Next xEnd SubPrivate Sub Command2_Click()Form5.HideForm1.ShowEnd SubPrivate Sub Form_Load()End Sub六、运行结果 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