保護雞蛋下落的裝置設計

朱一子 劉淑寧 符琳 丁永文

摘 要：用硬紙做成圓錐型保護雞蛋的裝置，以細沙和泡沫填充圓錐底部起到緩沖作用，初步得出保護效果最好且體積最小的圓錐模型。在此基礎上，選擇最優圓錐模型改裝成圓臺。在實驗中，對圓臺底部壓縮量、母線長度及圓錐頂角進行測定，考察了動量的變化、沖力大小、沖力作用的時間以及裝置的對稱性對雞蛋受力的影響。實驗結果表明：母線長為10cm，角度為52°，體積為v=143.912cm3的圓臺是保護效果最好的裝置。

關鍵詞：雞蛋 動量 沖量公式 圓錐體模型 圓臺

中圖分類號：TS25 文獻標識碼：A 文章編號：1674-098X（2017）12（c）-0096-03

Abstract：A conical device for protection of eggs is made of cardboard. Filling the bottom of the cone with fine sand and foam to play a buffer role， preliminary research makes a cone model of minimal volume. On this basis， the best cone model is elected to convert into a circular truncated cone. In the experiment， the compression at the bottom of the platform， the length of the busbar and the angle of the cone are measured， and the variation of momentum and the magnitude of the momentum are investigated. The effect of the time of impulse action and the symmetry of the device on the stress of eggs. The experimental results show that the best protection device is made： the length of busbar is 10cm， the angle is 52 degrees， and the volume is 143.912cm.

Key Words：Egg； Momentum； Impulse formula； The cone model；Circular truncated cone mode