Instrument Panel Beam Structure for High Rigidity at Lower Mass

The instrument panel beam is divided into multiple sections along its length, with each section having different cross-sectional shapes (circular, oval, flat). This segmentation allows optimization of rigidity in different regions without uniformly increasing wall thickness throughout the entire beam, thereby maintaining low mass while achieving required rigidity levels.

Different sections of the instrument panel beam are given different cross-sectional qualities tailored to their specific functional requirements. The circular section provides torsional rigidity, the oval section provides flexural rigidity, and the flat section provides both. This local quality optimization allows the beam to achieve high overall rigidity without increasing wall thickness uniformly, thus avoiding mass increase.

The beam is segmented into multiple sections with different cross-sectional shapes that can be produced through sequential drawing operations. Each section's shape is optimized for its specific rigidity requirements while remaining manufacturable through standard drawing processes, thus maintaining ease of manufacture while achieving high rigidity.

The cross-sectional shape parameters (circular, oval, flat) are changed along the length of the beam to optimize rigidity characteristics. These parameter changes are achieved through drawing processing with different dies, maintaining manufacturing simplicity while significantly improving flexural and torsional rigidity without increasing wall thickness.