CAJ | 학술논문

将压电陶瓷片成对埋置在不同截面尺寸、不同长度的混凝土试件中，在输入信号幅值一定的情况下，通过改变信号主频考察输出信号幅值的变化情况，并拟合出各试验工况下的衰减系数函数。结果显示，试件有界性对应力波在混凝土介质中传播的衰减系数函数具有影响，这种影响随试件截面尺寸或传感器间距的增加而减弱。比较各试件工况下的试验结果，对应力波在无限大混凝土介质中传播的衰减系数函数的修正进行了研究。
장압전도자편성대매치재불동절면척촌、불동장도적혼응토시건중，재수입신호폭치일정적정황하，통과개변신호주빈고찰수출신호폭치적변화정황，병의합출각시험공황하적쇠감계수함수。결과현시，시건유계성대응력파재혼응토개질중전파적쇠감계수함수구유영향，저충영향수시건절면척촌혹전감기간거적증가이감약。비교각시건공황하적시험결과，대응력파재무한대혼응토개질중전파적쇠감계수함수적수정진행료연구。
Pairs of piezoceramics were buried into concrete members with different section area and length. The al-terations of the amplitudes of the output signals were investigated by changing frequencies of input signals. The attenuation coefficient functions of all member conditions were obtained by test data fitting. The results indicate that the member boundedness affects the attenuation coefficient function, and it will weaken with the increasing of member section sizes and transducers space. At last, the correcting method on stress wave propagating in infinite concrete medium was investi-gated by comparing the test results in all member conditions.