从受迫振动实验原理出发，分析了强迫力矩初相对实验测量结果的影响. 利用MATLAB将受迫振动的解析解和不同阻力矩下的幅频特性可视化.教学改革与实践表明以学生为中心，以问题为导向，借助MATLAB可视化结果，在受迫振动实验原理讲解时引导学生分析操作过程的物理机制，夯实了学生的实验探究能力，同时培养了学生的动脑能力，取得了一定的成效.

 Based on the forced vibration experiment principle, the effect of the forced vibration initial phase on experimental measurement results is discussed. MATLAB is used to visualize the analytical solutions and amplitude-frequency characteristics under different resistance torques for forced vibration. Taking students as the center and problem oriented, students are guided to analyze the physical mechanism of the operation process during the explanation of experiment principle by means of MATLAB visualization, which can strengthen the experimental inquiry ability of student. Some achievement about the teaching reform has been achieved in teaching practice.