摘要
在汽车概念设计阶段,车身常由薄壁梁简化而成,其截面对轿车白车身刚度有直接影响。多室的薄壁梁截面极其复杂,在设计过程中不仅需考虑其力学性能,还需符合制造加工过程的各种工艺约束。本文基于薄壁梁截面设计的装配性与制造性等实际工程约束,提出一种梁截面形状控制方法以兼容多种工程约束。定义了梁截面多目标优化模型,以基于参考点的遗传算法NSGA-Ⅲ作为高维多目标优化问题算法,实现了相应的软件模块对截面惯性矩和扭转常量等参数进行优化。最终通过算例测试证明此方法的有效性。
In the car conceptual design stage of cars,the car body is often simplified by thin-walled beams,and its cross-section has a direct effect on the rigidity of the car body in white.The cross-section of multi-chamber thin-walled beams is extremely complex.In the design process,it is necessary not only to consider its mechanical properties,but also to meet various constraints of the manufacturing process.This paper fully considers the engineering constraints such as assemblability and manufacturability in the design of the car body section,and proposes a special beam section shape control method to be compatible with multiple engineering constraints.A cross-section multi-objective optimization model is defined,and NSGA-IIIis used as a high-dimensional multi-objective optimization algorithm to optimize parameters such as the section moment of inertia and torsion constant.Based on this method,the corresponding software modules are implemented.Finally,an example is used to prove the effectiveness of the method.
作者
张鸣鹤
熊志华
侯文彬
ZHANG Ming-he;XIONG Zhi-hua;HOU Wen-bin(School of Automotive Engineering,Dalian University of Technology,Dalian 116024,China;Ningbo Institute of Dalian University of Technology,Ningbo 315016,China)
出处
《计算力学学报》
CAS
CSCD
北大核心
2022年第1期80-85,共6页
Chinese Journal of Computational Mechanics
基金
国家自然科学基金面上项目(52072057)资助项目.
关键词
薄壁梁
概念设计
结构优化
NSGA-Ⅲ
thin-walled beam
conceptual design
structure optimization
NSGA-Ⅲ
