radius of inertia meaning in Chinese

惯量半径
惯性半径

Planar radius of inertia
平面惯性半径
The test proves that the caudal fin oscillation frequency , the maximum amplitude of vibration of caudal fin , the caudal fin strikes the water angle influence the fish ’ s speed ; the curve experiment has obtained curve radius of inertia advance curve and static curve ; the ups and downs experiment proves that the pectoral fin on different angle influences the fish to move ups and downs
加减速试验论证了尾鳍摆动频率、尾鳍后缘最大摆幅以及尾鳍的最大击水角度对鱼体速度的影响;转弯试验测得了机器鱼惯性前进转弯和静止转弯时的转弯半径;在机器鱼的升潜试验中论证了胸鳍不同转角对升潜运动的影响。