Wang Yida;Hao Qian;Xie Pengbo;MiaoYuanyuan;Liu Zhenbo;Wang Wei;Northeast Forestry University;Beijing Bamboo Or-chestra;

Bamboo flute;;Edge vibration;;Air velocity;;Vibration response;;Simulation

In order to explore the vibration response of bamboo flute edge under different airflow velocities, with the drum tone 5-middle tone fingering as the benchmark, and four airflow velocities(2.5, 5.5, 8.0 and 12.0 m·s~(-1)) as variables, fast Fourier transform(FFT) spectrum analysis method was used to determine the acoustic frequency of the edge vibration of bamboo flute. The first order frequency, overtone sequence, time domain eigenvalues(pulse factor(I), waveform factor(W)), frequency domain eigenvalues(center of gravity frequency(F_c)), and spectral eigenvalues(power spectral densityentropy(E(i)) of four airflow velocities were analyzed, and the feasibility of the simulation in acoustic vibration response analysis of bamboo flute was verified by COMSOL. With the increase of airflow velocity, the frequency(F(f_2)-F(e_3)) of the scale increases significantly, and the overtone sequence becomes more abundant. As the increase of airflow velocity, the impulse factor(I), waveform factor(W), and the center of gravity frequency(F_c) grow, while the power spectrum entropy(E(i)) decreases; the low scale(Altof_2-Alto#a_2) is greatly affected by the airflow velocity, and the high scale(Altoc_3-Altoe_3) is less affected by the airflow velocity. Comparison of experimental and simulation results found that frequency(Ff_2-Fe_3), and amplitude are 3.15%-9.31% and 3.14%-7.50%, respectively, which proves the feasibility of acoustic simulation in vibration response analysis of bamboo flute edge.