Abstract
Research and/or Engineering Questions/Objective:
Research the structure of BIW, optimize it to meet the requirements of the performance, and try to reduce weight.At the same time as the structure follows the styling changes, alot of topology optimization and size optimization are carried out, all of the effective and ineffective programs are recorded and summarized.The results have important reference value for the optimization and lightweight design of BIW.
Methodology: Using parametric methods to building model, the mainwork is optimization and lightweight design for the mode, bending and torsion stiffness. First, change the topology in the parametric model,verification scheme is effective for improving performance or reducing weight. After determining the topology, based on this model, change and verification structure size, also including the impact of structure’s position movement for performance.In this process, a change of structure size or location was defined as one parameter variable, through the optimization platform software such as ISIGHT, integrate the model change, submit calculation, results post processing and other work, to achieve automation and save human resources.Finally,optimize thickness, greatly reducing weight.
Results: After topology optimization, size and position optimization the performance was improved without increasing the weight. After the thickness optimization, the weight was reduced in case of performance satisfaction.Record and share all topology, size,location and thickness variation and results.
Limitations of this study: The structure of BIW has lots of parts and complex, any change in the structure may have an effect on performance.These summary experiences need long-term accumulation, so the research of this article needs to be supplemented and perfected constantly. Due to time, the first phase of the research work is mainly focused on the upper body changes and verification. In addition,the trend of performance impact since structural changes is consistent or not in all types of BIW, which is to be verified.
What does the paper offer that is new in the field including in comparison to other work by the authors?
Using the parametric modeling and step by step optimization method proposed by authors previously, to make a lightweight design.The key content is the verification of performance impact when structural changes.It is mainly for the optimization and lightweight design of BIW to provide more practical significance and feasibility program.
Conclusions: In the design process of BIW, there are lots of important performance target, when the performance is not satisfied, which part of the structure needs to be changed, how to change is important problem and urgent need to solve. This paper verified that,after many structural were changed,the performance will be good or bad or no effect, and share these results. It has great reference value for structure optimization and lightweight design.
KEYWORDS –Optimization, Modular, Parametric modeling, Lightweight, SFE Concept