摘要
针对某模锻液压机的1∶30模型,采用平面有限元分析模型将预紧梁与C形板接触的表面简化为一轮廓型线,进而将预紧梁表面形状优化问题简化为轮廓型线优化问题。分别以三次样条曲线、圆弧曲线和B样条曲线为目标曲线,应用序列二次规划法并借助于有限元分析软件对曲线的参数进行了优化。根据优化结果制作了不同表面形状的预紧梁,将其应用于该模锻液压机1∶30预应力组合框架实验装置并对预紧工况下的应力状态进行了测试。与测试结果比较,模拟结果的平均差值为9.87MPa,相对偏差的平均值为18.1%。测试结果与模拟分析结果均表明,以优化轮廓型线制作的曲面预紧梁,可不同程度地改善采用平面预紧梁时C形板与预紧梁接触区域的局部高应力现象。
Aiming at the 1 30 model of a die tween clamping beam and C--plates were simplified forging hydraulic press, the contact surfaces be- to the contour lines in plane finite element model, thus the optimization of contact surface was changed into the optimization of the contour lines. The parameters of the curves, including cubic spline curve, arc curve and B spline curve were taken as the target curves, and they were optimized with the sequential quadratic programming method in finite el- ement models. According to the optimization results, clamping beams with different contact surfaces were made and applied on the metal model, which was manufactured at a ratio of 1 ： 30 based on a die forging hydraulic press. The stress conditions under the preload load--case were tested. The average absolute error, compared with the simulations, in the experiments is 9.87MPa, and the average rela- tive error is 18.1%. The simulation results and experimental results based on the optimization results indicate that, under preload load--case, the optimized clamping beams can decrease the local high stress on contact surfaces in different degrees.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2013年第23期3134-3139,共6页
China Mechanical Engineering
基金
国家自然科学基金资助项目(50975248)
国家科技重大专项(2013ZX04003-031)
关键词
C形板
预紧梁
形状优化
高应力
C-- plate clamping beam
shape optimization high stress
