常見(jiàn)例句雙語(yǔ)例句As a parachute canopy moves unsteadily through the air, its equations of motion must include the rate of change of momentum of the air in which it is immersed.當(dāng)降落傘在空氣中作非定常運(yùn)動(dòng)時(shí),空氣動(dòng)量的變化率必須包括在降落傘的運(yùn)動(dòng)方程中。The opening process of the circle flat parachute with the differential size and the differential vent position of the canopy by the steady flow wind tunnel were dynamic tested.在改變傘衣面積和透氣量的情況下,在定常風(fēng)洞中對(duì)小型平面圓形傘的開(kāi)傘過(guò)程進(jìn)行了動(dòng)態(tài)試驗(yàn),研究了開(kāi)傘過(guò)程中傘衣形狀和傘衣所受載荷之間的動(dòng)態(tài)關(guān)系。With the landing impact attenuation devices, area of parachute canopy, weight of recovery system and landing impact load could be greatly reduced, In these years, the technologies have been developed.利用著陸緩沖裝置可以明顯降低降落傘的面積、減小回收系統(tǒng)的重量,同時(shí)大幅度降低飛行器著陸時(shí)的沖擊載荷。近些年來(lái),著陸緩沖技術(shù)有了些新的發(fā)展。 返回 parachute canopy