摘要
通过三线摆法测量三线摆下圆盘转动惯量原理,推导出利用三线摆法测量重力加速度表达式。为了提高三线摆法测量哈尔滨地区重力加速度的准确性,设定转动周期个数分别为5、10、20、30、40和50个。研究设定不同转动周期个数,空气阻力及悬线间摩擦对三线摆法所测重力加速度准确度的影响。发现设置测量周期个数为40个时,所测得的重力加速度最接近哈尔滨地区实际重力加速度值。
The three wire pendulum method was used to deduce the rotary inertia of the three wire pendulum. Furthermore,the principle was used to deduce the expression of acceleration of gravity. In order to improve the accuracy of gravity acceleration in Harbin area by three wire pendulum method,the rotation period number is 5,10,20,40,30 and 50,respectively. The impact of the air resistance and friction between suspension lines to acceleration of gravity was analyzed by choosing different the number of rotation period. According to the compare between the Haerbin gravity acceleration of experiment and Haerbin gravity acceleration of reasonable,the optimal numbers of rotation period is 40.
出处
《实验科学与技术》
2016年第5期26-27,51,共3页
Experiment Science and Technology
关键词
三线摆
转动周期
转动惯量
重力加速度
three-line pendulum
rotation period
moment of inertia
gravity acceleration
