基于响应面法的升降机滚筒线支架轻量化设计

Lightweight Design for Lift Drum Line Bracket Based on Response Surface Method

为了降低重量,减少成本,提高市场竞争力,基于响应面法对某型具有弯曲导轨的连续式升降机进料滚筒线支架进行了轻量化设计。采用中心复合试验设计方法进行样本点的采集,利用有限元数值模拟技术获取样本点的响应值。根据所得数据,构建了支架质量和最大等效应力的二阶多项式响应面模型,并进行了精度检验,验证了所构建响应面模型的精确性。以支架质量为目标,强度为约束,基于所构建的响应面模型,建立了支架轻量化设计数学模型,采用序列二次规划算法进行求解,并对优化结果进行了仿真验证。结果表明,优化后的支架强度满足要求,质量减少了11.7kg,减重率达42.5%,轻量化效果显著。

In order to reduce the weight and the cost,and enhance the market competitiveness,a lightweight design was performed for the feed drum line bracket of a continuous lift with curved guide based on response surface method. The central composite design method was used to gather sample points and the response value of sample points was obtained by using the finite element numerical simulation technique. The two-order polynomial response surface model of bracket mass and bracket maximum equivalent stress were established according to the sample points data,and the precision tests were carried out to illustrate the veracity of the response surface model. Based on the proposed response surface model,a lightweight design mathematical model of the bracket was established by taking the mass as object function and the strength as constraint. The sequential quadratic programming method was adopted to solve this optimization problem,then the optimization results was validated through simulation. The results show that the strength meets the requirements,the mass is reduced by 11.7 kg,the weight loss rate is 42.5%,and the lightweight effect is remarkable.