An accurate load model which accounts for the lack of coherency among a group of people is fundamental to the attainment of comprehensive guidelines for the design and assessment of grandstands. In order for a realistic crowd load model to have validity it must be calibrated using data determined from people in an environment close to that experienced in practice. To this end, a segment of a full scale raked grandstand was designed and built in the structural dynamics laboratory in Oxford University. The grandstand test rig reproduces the correct seating arrangement found in modern stadia - accommodating up to 15 test subjects in a 3 x 5 row arrangement. The raked deck has been designed to be rigid and light weight keeping the natural frequency above a level where internal modes may be excited by a group of jumping people. This will enable an understanding of the fundamental jumping mechanism to be gained. Each of the test subjects on the grandstand jump/bob on a bespoke load plate in time to a musical beat produced by a metronome. The second stage of testing involves the actuation of the deck by means of synchronous linear electric motors to investigate the effect of structure flexibility on crowd coherency.
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机译：一个准确的负载模型，占一群人缺乏一致性的责任是达到各种指导方针的基础，以实现对耕地的设计和评估。为了实现现实人群负载模型，必须使用从练习中经历的环境中的人员确定的人员确定的数据来校准它。为此，在牛津大学的结构动态实验室设计和建造了一段全规模罗布的礼服。经普隆试验台再现现代Stadia中发现的正确座位布置 - 在3 x 5排布置中可容纳15个测试对象。耙甲板设计成刚性和重量轻，将自然频率保持在一个水平上方，其中内部模式可能会被一群跳跃的人兴奋。这将能够了解要获得的基本跳跃机制。每个测试对象都在定制装载板上的看台跳跃/鲍勃及时到由节拍器产生的乐节。第二阶段的测试阶段涉及通过同步线性电动机致动甲板，以研究结构灵活性对人群一致性的影响。
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