焦点访谈丨CR450动车组跑出中国创新“加速度”

Core Viewpoint - The article emphasizes the importance of original innovation and key core technology breakthroughs in China's high-speed rail industry, particularly highlighting the advancements of the CR450 train set, which has achieved record speeds and represents a significant technological leap in the sector [1][31]. Group 1: Technological Advancements - The CR450 train set has achieved a test speed of 453 km/h and a relative speed of 896 km/h, marking it as the fastest high-speed train globally [1][6][22]. - The design of the CR450 includes a longer and more aerodynamic train head, a reduced height of 20 cm, and a fully enclosed undercarriage to minimize operational resistance [2][4]. - The CR450's operational speed is set to reach 400 km/h, which necessitates overcoming various technical challenges, including enhancing the braking system to ensure safety at higher speeds [8][9][10]. Group 2: Engineering and Design Innovations - The CR450 train set aims for a 10% overall weight reduction, achieving a target of shedding 50 tons through improvements in the traction and braking systems [16][14]. - The braking system must withstand high temperatures, with brake discs reaching up to 700°C during operation, necessitating advancements in materials to maintain performance [12][19]. - The design requirements ensure that the noise level at 400 km/h is comparable to the current CR400 train operating at 350 km/h, aiming for a quiet and comfortable passenger experience [18]. Group 3: Industry Impact and Collaboration - The development of the CR450 has mobilized over 2,100 companies across more than 20 provinces, showcasing a collaborative effort in the manufacturing sector [25][24]. - The high-speed rail industry has seen a significant increase in domestic production capabilities, with previously imported components now being developed locally, such as high-strength wheel axles [27][29]. - By the end of 2024, China's high-speed rail network is projected to reach 48,000 km, accounting for over 70% of the world's total, reflecting the country's leadership in high-speed rail technology [31].