China News Service, Beijing, February 5th (Wang Hailu, Ma Shuaisha) At the opening ceremony of the Beijing Winter Olympics, the appearance and display of the Olympic rings were impressive.
The waterfall fell from the sky and condensed into ice. The nearly three-story ice cube rose slowly, and the brilliant laser hit the ice cube to carve crystal clear five rings.
Behind this link is the careful design of the Winter Olympics team of the First Academy of China Aerospace Science and Technology Corporation.
As strong and light as a rocket
According to reports, the structure of the Ice Fifth Ring is characterized by special shape, large span and low stiffness. Its design is similar to that of rocket development, and it has very strict requirements on weight and accuracy.
Referring to the method of aerospace structure design, the relevant team developed the "skeleton" aluminum alloy truss structure, "clothing" LED display, and "coat" diffuser for Wuhuan, so that Wuhuan is as strong and light as the rocket body. .
In addition, the five rings must be raised in the Ice Cube, the largest lifting device in the entire ground system, and each process must be closely matched.
Under the circumstance of limited space, the research and development team precisely controlled the 315kW motor to drive 4 sets of synchronous transmission units consisting of 16 chains and 16 steel wire ropes, so that the lifting accuracy was controlled at the millimeter level.
Photo courtesy of the First Academy of China Aerospace Science and Technology Corporation, which is hidden in the "Ice Cube"
Wind-resistant like a rocket
China's new generation of launch vehicles all have strong wind resistance capabilities. The designers have also given this ability to the five rings, so that the Olympic logo with a suspension height of more than ten meters is high. During the entire opening ceremony, even if it encounters a strong wind of level 6, Also very determined.
The weight of the five rings is about 3 tons, and the thickness is only 350 mm. The ultra-thin and large-sized device rises and falls rapidly at high altitudes. It is like a piece of paper in the face of strong winds, and it is easy to stand up and roll over.
In order to lift the five rings safely, the core is to adjust the shape of the product, and the second is to determine the lifting point.
In order to achieve the most beautiful visual effect, only two lifting points can be used during the lifting process.
In this regard, the project team accurately determined the lifting point through a large number of calculations and experiments, and realized the performance effect of the high-altitude Wia hoisting the five rings smoothly and rising to the predetermined height, which complements the five-star red flag.
Like a rocket, there are "spare parts"
In the development of aerospace system engineering, reliability design is also a top priority.
The Long March 2F rocket has prepared a spare arrow to stand guard in the manned spaceflight project in 2021. In this five-ring design, there are also "spare parts".
Five Rings uses a large number of LED screens. What if the lamp beads of a certain unit temporarily fail?
The team used a dual-screen redundant special-shaped splicing LED programmable display device. If there is a problem with one set, the other set of screens can be installed immediately.
为确保五环展示环节的成功，一院冬奥团队按航天系统工程方法，对标航天质量控制、风险控制、设计优化等要求，进行了上千次的虚拟仿真试验，用航天技术呈现了不一样的五环。(完)