整车下线灯光检测装备的轻量化设计与结构优化

Lightweight design and structure optimization of vehicle offline light detection equipment

为节约整车下线灯光检测装备的制造材料,降低生产及运输成本,根据零部件模块化、标准化及重用性要求,对其内部桁架结构进行轻量化设计,建立了三维数字模型;对桁架结构的强度和刚度进行分析与校核,得到应力与应变云图;将应力和应变作为约束条件,通过响应面分析,以多元二次回归方程模拟输入参数和输出参数间的函数关系,采用目标驱动优化分析法对桁架梁型材的截面尺寸进行优化,得到最优尺寸;以改进后桁架的重力为预应力,对立柱进行特征值屈曲分析,并进一步进行轻量化设计,总体减重率达到30%。通过静力学分析,验证了其结构的稳定性。在保证结构稳定性的前提下,实现了对检测装备的轻量化设计。

In order to save the manufacturing materials for vehicle offline light detection equipment and reduce production and transportation costs,according to the requirements of modularization,standardization,and reusability of components,a lightweight design solution was carried out,and the 3D digital model was established;The strength and stiffness of the truss structure were analyzed,and the stress and strain cloud maps were obtained;By using stress and strain as constraints,and employing response surface analysis,a multivariate quadratic regression equation was used to simulate the functional relationship between input and output parameters.The goal driven optimization analysis method was used to optimize the cross-sectional size of truss beam profiles and obtain the optimal size;The gravity of the improved truss was used as the prestressing force,eigenvalue buckling analysis was conducted on the columns,and further lightweight design was carried out,and the overall weight reduction can reach 30%.The stability of the structure was verified by statics analysis.On the premise of ensuring structural stability,the lightweight design of the detection equipment has been completed.