摘要
介绍了新研制的用动力学法测杨氏模量的实验装置，它具有功耗低、灵敏度高的特点；教学中测量悬线不同位置时的共振频率，用作图法拟合出其精确值，以减少由于悬线不在节点引起的系统性误差．
A new equipment of measuring Young modulus sensitively and low energy-costed by dynamical method is introduced.The device is used to measure resonant frequencies of a rod suspended with two threads.When suspended points move,the measured resonant frequencies change slightly.In order to eliminate systemic error as the suspended points are off the nodal point,a graphical fitting is adopted.The precision of the measurement is one order of magnitude higher than traditional static stretched method.
出处
《大学物理》
1999年第7期25-27,共3页
College Physics
