heaving motion 中文意思是什麼
heaving motion
解釋
升降運動-
And it seemed she was like the sea, nothing but dark waves rising and heaving, heaving with a great swell, so that slowly her whole darkness was in motion, and she was ocean rolling its dark, dumb mass
她彷彿象個大海，滿是些幽暗的波濤，上升著，膨脹著，膨脹成一個巨浪，於是慢慢地，整個的幽暗的她，都在動作起來，她成了一個默默地蒙昧地興波作浪的海洋。 -
In general, the upward amplitude curve " curvature is larger, and it changes quicker. on the contrary, the downward is smaller and slower ; because the flare force contains the square of the wave elevation velocity, it results in an difference between the flare force frequence and the associated moving frequence ; the flare force decreases the downward amplitude of heaving oscillations ; the speed of ship has an ignorant effect on the peak values of three calculated values, but there is an obvious effect on the oscillating frequence ; the wave amplitude has an effect on the ship motion, and there is an linear relation between the oscillating amplitude and the wave amplitude on the whole. by the way, there are some experiences and lessons according to the progress calculation : before the calculation of the ship motion, we should checkout the balance in a calm water firstly, namely, the whole displace of ship and the longitudinal position of the center of gravity must be consistent with the draft in calm water, or else, the calculation may show the " floating " phenomenon ; the mixed language programming has a lot of virtues, but it exists a fatal limitation - the debug of dll
研究表明：在某些頻率范圍內相關水動力系數基本不隨吃水變化，只有超過某一頻率后水動力系數的值才會出現差異；在橫搖方向，水動力系數並沒有隨著吃水的變化發生規則變化，而是出現了波動現象；近船首剖面的水動力系數計算表明，水動力系數的波動非常大，並遠遠偏離了平均位置的水動力系數值，值的變化速率也不盡相同，總的看來，上振幅曲線曲率較大，變化較快，下振幅曲線曲率較小，變化較慢；外飄力和波面運動的速度的平方項有關，導致其振動頻率和相應運動方向的頻率不同；外飄力使升沉向下運動的幅值減小；船速對三個計算量的峰值影響甚微，但對振動頻率有明顯影響；波幅對船舶運動的影響是明顯的，船舶運動的幅值基本上和波幅成線性關系。 -
Using 2 - d strip method and the high - speed slender body theory, the heaving motion responses in regular wave of ship with combined appendage are computed. the results are compared with the results of naked ship hull, and the anti - pitching effect of combined appendage is validated. a method of optimizing the seakeeping is provided from the aspect of the ship hull
因此本文針對船舶耐波性能的優化，提出了一種減縱搖組合附體，將半潛艏和艏鰭安裝在常規單體船上，初步闡述了半潛艏和艏鰭的水動力作用機理，並按照二維切片法和高速細長體理論計算了加裝組合附體后，船舶在規則波中的垂向穩態運動響應，與裸船體的結果進行了比較，驗證組合附體的減搖效果，從船體本身出發提供了?種優化船舶耐波性的方法； 3 -
Further, driving fin motion model is setup and simulated using matlab, the relation of phase difference between feathering and heaving motion to caudal fin is deeply analyzed. simulation shows that the proposed model is correct and reliable
利用尾鰭和擺翼運動特徵的相似性，建立了擺翼運動模型，同時利用matlab軟體進行了擺翼的運動模擬，並重點探討了擺動?平動相位差對擺翼運動的影響。
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