机械原理课程设计牛头刨床分析

1、机械原理课程设计设计题目：牛头刨床分析学校 ：太原工业学院设计者 ： 班级 姓名 指导老师： 一运动简图二设计方案设 计内 容导 杆 机 构 的 运 动 分 析导杆机构的动态静力分析符号n2l0204l02al04blbcl04s4xs6ys6g4g6pypjs4单位r/minmmnmmkgm2方案603801105400.25l04b0.5l04b240502007007000801.164350905800.3l04b0.5l04b200502208009000801.2724301108100.36l04b0.5l04b1804022062080001001.2一、用解析法作导杆机构的运

2、动分析如图所示，先建立一直角坐标系，并标出各杆矢量及其方位角。其中共有四个未知量、。为求解需建立两个封闭的矢量方程，为此需利用两个封闭的图形o3ao2o3及o3bfdo3，由此可得：o3并写成投影方程为：由上述各式可解得：由以上各式即可求得、四个运动变量，而滑块的方位角=。然后，分别将上式对时间取一次、二次导数，并写成矩阵形式，及得一下速度和加速度方程式。而=、=三 静力分析对刨头6做受力分析如图所示由题知f6=m *ae g=700 p=7000 （if x(n)10.45&x(n)169.55）对三杆受力分析如图所示f56=(-f6+ p)/cos(pi-x4(n) fn=-(g6+f6*

3、sin(pi-x4(n)/cos(pi-x4(n)由题知 g=200 j=1.1则 f23*cos(pi/2-x3(n)-f14x=f56*cos(pi-x4(n)+m4*s3(n)*a3(n)*cos(pi/2-x3(n)+m4*s3(n)*s3(n)*w3(n)*cos(x3(n)f23*sin(pi/2-x3(n)+f14y= f56*sin(pi-x4(n)+m4*s3(n)*a3(n)*sin(pi/2-x3(n)-m4*s3(n)*s3(n)*w3(n)*sin(x3(n)+g4-f23*s3(n)*(sin(pi/2-x3(n)*cos(x3(n)+cos(pi/2-x3(n)*

4、sin(x3(n)= -(f56*sin(pi-x4(n)*l3*cos(x3(n)+f56*cos(pi-x4(n)*l3*sin(x3(n)+ m4*s3(n)*a3(n)*cos(pi/2-x3(n)*l3/2*sin(x3(n)+ m4*s3(n)*a3(n)*sin(pi/2-x3(n)*l3/2*cos(x3(n)+ m4*s3(n)*s3(n)*w3(n)*cos(x3(n)*l3/2*sin(x3(n)- m4*s3(n)*s3(n)*w3(n)*sin(x3(n)*l3/2*cos(x3(n)+g4*l3/2*cos(x3(n)+j4*a3(n)由一杆受力分析得平衡力矩等于m

5、b=f23* l1*sin(pi/2-x3(n)+x1(n)同速度加速度解法可编写matlab程序如下运行结果如下x1w3w4vea3a4aemb/0/(rad/s)/(m/s)/(rad/s2)/(m/s2)/(n*m)00.4081-0.45509-0.207258.0161-8.2825-4.130214.77810.450.16832-0.19441-0.084869.2245-10.542-4.66126.79820.9-0.116830.135420.05885310.493-12.108-5.2911-5.284631.35-0.450430.504860.2285211.745

6、-12.365-6.0317-22.90841.8-0.830350.859040.4273612.844-10.583-6.8245-47.14252.25-1.2461.11650.6533213.583-6.0985-7.4914-76.50962.7-1.67481.17910.89413.7011.3701-7.733-103.973.15-2.08050.961121.123612.91511.208-7.2326-116.4383.6-2.41390.438391.30710.96521.354-5.8485-103.0894.05-2.6196-0.302151.41067.6

7、45828.41-3.7107-65.164104.5-2.6483-1.06361.41352.86629.05-1.0559-15.895114.95-2.4719-1.61581.3099-3.17221.9681.971229.375125.4-2.0972-1.79841.108-9.70958.88285.18558.146135.85-1.5692-1.58190.82932-15.405-5.87938.082362.724146.3-0.96018-1.06180.50835-18.878-17.2439.945844.957156.75-0.34861-0.402430.1

8、8483-19.514-22.04610.33716.613167.20.201870.23403-0.10705-17.773-20.4439.4217-8.815177.650.654050.73704-0.34647-14.742-14.9257.784-24.27188.10.99671.0602-0.52719-11.456-8.28316.0201-29.963198.551.2371.2066-0.65352-8.5345-2.33464.4856483.62091.39131.2063-0.735-6.18532.21063.288581.53219.451.47871.097

9、4-0.78222-4.37295.33012.3885661.53229.91.51630.91599-0.80449-2.97137.26991.6994725.83240.351.51820.69159-0.80896-1.85058.30521.1368776.31250.81.49510.44709-0.8006-0.90848.65450.63929814.1261.251.45420.19974-0.78256-0.073628.46980.16867839.5271.71.4003-0.03744-0.756560.701147.8528-0.29516852.11282.15

10、1.3359-0.25431-0.723361.44766.8733-0.75996851.01292.61.262-0.44252-0.683062.18865.5805-1.2259834.97303.051.1779-0.59469-0.635332.94254.0093-1.6893802.69313.51.082-0.70361-0.579573.72652.1832-2.1455752.97323.950.97105-0.76168-0.5154.55760.11905-2.5914684.69334.40.84111-0.76059-0.440615.4533-2.1638-3.0278596.82344.850.68698-0.69151-0.355056.4304-4.6235-3.4627488.15355.30.50262-0.54647-0.256497.502-7.1