亚洲免费av电影一区二区三区,日韩爱爱视频,51精品视频一区二区三区,91视频爱爱,日韩欧美在线播放视频,中文字幕少妇AV,亚洲电影中文字幕,久久久久亚洲av成人网址,久久综合视频网站,国产在线不卡免费播放

        ?

        遠程打擊的致命之矢

        2019-08-27 10:22:56五花肉
        質(zhì)量與標準化 2019年5期
        關(guān)鍵詞:箭鏃湖北省博物館三棱錐

        文/五花肉

        (支持單位:上海市質(zhì)量和標準化研究院)

        不論是單兵突襲的致命一擊,還是軍團作戰(zhàn)的飽和打擊,箭都是冷兵器時代最令人膽寒的遠攻武器。

        Whether it was the fatal blow or the concentrated attack of army combat, arrows were the most chilling long-range weapons in the cold steel war era.

        箭桿定準度Accuracy Depending on Arrow Rod

        要確保箭的遠程打擊威懾力,命中率是關(guān)鍵。這不僅取決于射手的技術(shù),更取決于箭桿的質(zhì)量,尤其是代表箭桿抗彎強度的重要指標——撓度。被弓弦彈射的瞬間,箭桿受力呈弧狀,在飛行中逐漸恢復筆直,撓度不均會直接導致箭桿偏離預設飛行軌道,大幅降低射擊準度。

        Accuracy was the key of ensuring the deadly force of long-range strike of arrows. Accuracy was not only depends on the archer's technique, but also on the quality of the archer's rod, especially the deflection,which was an important index of arrow rod strength.At the moment of being shot by bowstring, the force on the arrow rod assumed an arc shape, and gradually recovered in fl ight. Uneven def l ection would cause the arrow rod to deviate from the normal fl ight orbit, thus greatly reducing the accuracy.

        箭羽助穩(wěn)定Arrow Feathers for Stability

        在撓度符合要求的基礎上,古代匠人還通過安裝箭羽的方式,進一步確保箭桿的飛行穩(wěn)定性?!拔宸制溟L,而羽其一”,箭羽應在距箭桿尾部五分之一處,安裝相互對稱的三簇箭羽。箭羽的多寡需要兼顧射擊速度和射擊準度的要求,太多會降低飛行速度,過少則影響飛行穩(wěn)定。

        On the basis of deflection requirement, ancient craftsmen also installed arrow feathers to further ensure the flight stability of the arrow rod. Arrow Feathers should be installed on the position of one fifth length of arrow rod with three symmetrical clusters of arrow feathers. The amount of arrow feathers should achieve the balance of speed and accurancy. Too much would reduce flying speed,while too little would affect flight stability.

        箭鏃(一組)·戰(zhàn)國湖北省博物館藏

        無鋒刃箭鏃(一組)·戰(zhàn)國湖北省博物館藏

        銅箭鏃浙江省博物館藏

        銅鏃湖北省博物館藏

        箭頭增殺傷Arrowhead for Lethality

        箭的最終殺傷力來自于箭頭。為了減少空氣阻力,箭頭自誕生之初就始終保持尖銳的幾何形態(tài),從早期的棒形、葉形逐漸進化為三角形、三棱錐形。到了戰(zhàn)國時期,秦國工匠發(fā)明了曲面三棱錐箭頭,三個弧面幾乎完全相同,完美的流線形態(tài)與現(xiàn)代空氣動力學理論不謀而合,導向性和穿透力大幅提升。不僅如此,秦國還依靠統(tǒng)一工藝標準,成功實現(xiàn)了這種箭頭的模塊化批量生產(chǎn),為秦國軍隊獨步天下的遠攻能力奠定了牢固的基礎。

        The lethality of an arrow came from the arrowhead.In order to reduce the air resistance, the arrowhead always maintained a sharp geometric shape since its birth, gradually evolving from rod shape and leaf shape to triangular pyramid shape. In the Warring States period in the acient China, Qin artisans invented curved triangular pyramid arrows. The three curved surfaces were almost identical. The perfect streamline form coincides with modern aerodynamic theory, and its guidance and penetrating power were greatly improved.Furthermore, Qin State also successfully realized the modular mass production of the arrowheads by means of unified process standards, which laid a solid foundation for the Qin army's ability to attack far and wide.

        結(jié) 語Conclusion

        箭桿、箭羽、箭頭共同構(gòu)成了一支完整的箭,在各自精益求精的同時,互相協(xié)調(diào)、彼此成就,只為了獲得最佳效益、貢獻完美一擊。

        The arrow rod, arrow feather and arrowhead form a complete arrow. While keeping improving, they coordinate with each other and accomplish each other, in order to strike a deadly attack.

        猜你喜歡
        箭鏃湖北省博物館三棱錐
        怎樣用補形法求三棱錐的外接球半徑
        試論秦漢箭鏃演變
        怎樣用補形法求三棱錐的外接球半徑
        《百年民俗 湖北記憶》
        試論秦漢時期異形箭鏃
        A History of 2400-year-old Civilization Unveiled
        Special Focus(2020年5期)2020-11-27 04:28:38
        湖北省博物館文創(chuàng)產(chǎn)品設計研究
        三棱錐中的一個不等式
        松嫩平原地區(qū)古代箭鏃的發(fā)現(xiàn)及研究
        免費開放背景下游客對博物館感知價值的研究——以湖北省博物館為例
        男女性搞视频网站免费 | 亚洲精品无码专区在线| 亚洲成年网站在线777| 国产成人色污在线观看| 国产免费二区三区视频| 妺妺窝人体色www聚色窝| 五月天综合在线| 国产黄色污一区二区三区| 91久久偷偷做嫩模影院| 亚洲一区二区三区播放| 国产日韩欧美网站| 精品国精品自拍自在线| 国产美女高潮流白浆免费视频| 中文字幕一区二区三区日韩精品| 国产激情在观看| 免费人成黄页在线观看国产| 欧美丰满熟妇xxxx性ppx人交| 精品久久久久久777米琪桃花| 宅宅午夜无码一区二区三区| 高清不卡av一区二区| 蜜臀av999无码精品国产专区| 日韩高清毛片| 日本高清人妻一区二区| 久久影院午夜理论片无码| 装睡被陌生人摸出水好爽| 亚洲免费毛片网| 九九久久精品国产免费av| 国产女人高潮叫床视频| 亚洲一区sm无码| 久久国产精品亚洲我射av大全| 国产精品videossex国产高清| 亚洲爆乳无码专区| 一区二区三区熟妇人妻18| 日本道色综合久久影院| 丰满的少妇xxxxx青青青| 久久99国产亚洲高清观看首页| 成人久久久精品乱码一区二区三区| 欧美精品videossex少妇| 国产中文字幕乱码在线| 日韩美腿丝袜三区四区| 国产午夜福利不卡在线观看 |