Simultaneous Structure Design Optimization of Multiple Car Models using FMQA

Toshiki Kondo･Takehisa Kohira (Mazda)･Yuki Minamoto (Fixstars Amplify)

We examine the potential of Quantum Annealing (QA) for efficiently solving large-scale vehicle design optimization problems. In this paper, we focus on FMQA, which is applicable to black-box evaluation functions, and proposes solutions to challenges such as adjustment of function weights and diversity preservation of solutions. By comparing proposed method with conventional optimization methods, we discuss the superiority of QA in actual design problems.

Development of Dynamic Visualization Method of the Load Transfer Analysis Ustar (U*)

Takehisa Kohira･Sadayoshi Okamoto･Hiromasa Kemmotsu･Masanori Honda (Mazda)

U* analysis has been proposed as a method for estimating load transfer conditions inside a structure. However, when U* analysis is applied to large-scale problems such as car body structures, there are issues with computation time and load path estimation. In this paper, we report on the development of a fast computation method based on parallel computation and a method for estimating load paths in a multi-layered structure such as a car body structure.

Optimizing Driver Seat Comfort using Vehicle Package Factors

Sun Woo Choi (Hyundai Motor)

In order to implement a comfort skin, various cross sections are managed in the drawings, such as a free contour line, a cushion cross section, and a seat back cross section. In particular, FCL is a cross section generated based on a vehicle package and is the most basic cross section for managing the entire seat skin.
In this study, it is considered a method of generating the optimal standard skin based on the seats developed and studied so far. To this end, not only the feedback received from the field after mass production was considered, but also the development history of each seat skin was compared and evaluated.

Optimal Function Allocation Method for ECU to Construct Architecture that Balances Aggregation of Functions and Test Reusability

Takaaki Hayashi･Yuto Imanishi (Hitachi)･Hiroki Maehama･Yoshiyuki Yoshida･Ryosuke Ishida (Hitachi Astemo)

When functions are aggregated to realize centralized ECU, the difference from the conventional function allocation becomes large, and test reusability deteriorates. To balance both of these properties, we propose an optimal method of allocating functions to ECUs that the objective function is set as the weighted sum of the indicators of both of the properties. We also confirmed that the tradeoff between indicators can be visualized by repeatedly executing the allocation while changing the weights of the weighted sum.

A Study on the Development of Optimum Body Structure for Low Entry BEV using 1D Beam Model

Gyuhee Kim･Jung Hun Choi･Ji Hoon Moon･Hong Suk Chang (Hyundai Motor)

This study proposes a new BIW structure for a compact-sized electric bus, achieved through stiffness analysis of the body in the concept stage using a 1D beam model, sensitivity analysis, and optimization processes. The 1D beam element-based analysis offers more flexibility in shape modification, model construction, and analysis time compared to 3D shell element-based analysis. Results: 1)Selection of critical components and proposal of optimal cross-sectional sizes, 2) Lightweight proposals through sensitivity analysis of component, 3) Proposal of target-based stiffness optimization concepts 4) Enhancement of the contribution of analysis before the detailed design stage.