This article proposes a new approach called revolutionary superposition layout (RSL) for obtaining optimum designs of nonconcurrent multiloads structures in general, and for connecting rod (CR) in particular. Since the compression and tension resulted from the combustion and exhaust strokes are nonconcurrent loads, the importance of this approach arises up. RSL depends on combining the optimum‐design layouts obtained from different individual nonconcurrent load cases into one resultant design. This final design efficiently sustains all different loads applied to it. RSL presents a simple, less computational effort in the dynamic environment, and less time‐consuming method. RSL has been compared with a multiload optimization method called bound formulation (BF) for obtaining the optimum design of some simple models before dealing with the CR model afterward. Two distinctive optimum topological designs of CR produced by RSL have proved their feasibility and achieved considerable improvements against both the conventional CR design being used nowadays in the automotive industry and the BF method designs, as well. A comparative study between them was accomplished based on both structural and modal analyses in ANSYS. As a result, the proposed RSL design shows a significant reduction of compliance, displacement/deflection and mass moment of inertia by 57.2%, 68.7%, and 5.9%, respectively, compared with conventional one.

中文翻译：

---

非并行多负载模型拓扑优化的革命性叠加布局方法：连杆案例研究

本文提出了一种称为革命性叠加布局（RSL）的新方法，该方法通常用于获得非并行多载荷结构的最佳设计，尤其是用于连杆（CR）。由于燃烧冲程和排气冲程产生的压缩和张力是非并发负载，因此这种方法的重要性日益凸显。RSL依赖于将从不同的单个非并行负载工况中获得的最佳设计布局组合到一个最终设计中。这种最终设计有效地承受了施加在其上的所有不同负载。RSL在动态环境中提供了一种简单，较少的计算工作量，并且耗时较少的方法。RSL已与称为绑定公式（BF）的多负载优化方法进行比较，以便在随后处理CR模型之前获得一些简单模型的最佳设计。RSL生产的两种独特的最优CR拓扑设计已经证明了它们的可行性，并且相对于当今在汽车工业中使用的常规CR设计和BF方法设计都取得了显着改进。基于ANSYS中的结构和模态分析，完成了它们之间的比较研究。结果，与传统的RSL设计相比，其柔度，位移/挠度和质量惯性矩分别显着降低了57.2％，68.7％和5.9％。RSL生产的两种独特的最优CR拓扑设计已经证明了它们的可行性，并且相对于当今在汽车工业中使用的常规CR设计和BF方法设计都取得了显着改进。基于ANSYS中的结构和模态分析，完成了它们之间的比较研究。结果，与传统的RSL设计相比，其柔度，位移/挠度和质量惯性矩分别显着降低了57.2％，68.7％和5.9％。RSL生产的两种独特的最优CR拓扑设计已经证明了它们的可行性，并且相对于当今在汽车工业中使用的常规CR设计和BF方法设计都取得了显着改进。基于ANSYS中的结构和模态分析，完成了它们之间的比较研究。结果，与传统的RSL设计相比，其柔度，位移/挠度和质量惯性矩分别显着降低了57.2％，68.7％和5.9％。