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屋顶排水槽板折弯机的横梁在折弯过程中承受双向载荷作用,横梁的刚性和抗振性是影响折弯机整机精度和稳定性的重要因素。首先对横梁承载情况进行受力分析,然后建立基于变密度法的拓扑优化数学模型,增加双向载荷约束条件,采用通用性较强的优化准则法,通过卷积算子建立滤波器修改元素灵敏度以提高网格独立性,解决棋盘格和网络依赖性问题,编制相应MATLAB优化程序进行结构拓扑优化,利用优化后的截面形状绘制三维模型,引入到ANAYS软件对拓扑结构优化结果进行静动态分析以验证优化结果,并通过LMS振动测试仪和分析系统对横梁进行模态测试试验,验证了优化与仿真的有效性和准确性,最终设计成果应用于屋顶排水槽板折弯机横梁设计,取得了很好的工程应用效果,为相似结构件优化设计提供了有益的借鉴与参考。
Roof drainage groove bending machine beam in the bending process to withstand the role of two-way load, beam rigidity and vibration resistance is an important factor affecting the accuracy and stability of the bending machine. Firstly, the force analysis of the beam is carried out. Then, a mathematical model of topological optimization based on variable density method is established, the constraints of bidirectional load are increased, the generalized optimization criterion method is adopted, and the filter is modified by the convolution operator to modify the elemental sensitivity Improve grid independence, solve the checkerboard grid and network dependency problems, compile the corresponding MATLAB optimization program to optimize the structure topology, and use the optimized cross-sectional shape to draw the three-dimensional model, and introduce the software to analyze the topology optimization results through static and dynamic analysis The result of optimization and the modal test of the beam through LMS vibration tester and analysis system verify the validity and accuracy of the optimization and simulation. The final design results are applied to the beam design of the roof drainage channel bender. Good engineering application results provide a useful reference and reference for the optimization design of similar structures.