CAJ | 학술논문

为获得刚性模型测压试验中模型表面的真实压力信号，需对经过管路系统后的信号进行修正。对6种不同长度的管路系统采用正弦激励的方法进行频响函数测试研究，采用测试结果对气动压力信号进行了修正，研究结果表明：随着测压管长度的增加，管路的频响函数的幅值呈现先放大后衰减的趋势，放大和衰减的转折点向低频移动，而所有管长的频响函数的相位均为衰减滞后；采用频响函数修正方法对管道畸变进行修正，修正后值与真值基本吻合，修正精度高。
위획득강성모형측압시험중모형표면적진실압력신호，수대경과관로계통후적신호진행수정。대6충불동장도적관로계통채용정현격려적방법진행빈향함수측시연구，채용측시결과대기동압력신호진행료수정，연구결과표명：수착측압관장도적증가，관로적빈향함수적폭치정현선방대후쇠감적추세，방대화쇠감적전절점향저빈이동，이소유관장적빈향함수적상위균위쇠감체후；채용빈향함수수정방법대관도기변진행수정，수정후치여진치기본문합，수정정도고。
Single-channel tubing system is usually used to measure fluctuating pressure on the surface of model in lab. However, distortion may happen during dynamic pressure signal propagating. In order to obtain the real pressure signal on the surface of model, in this paper, tubing system based on correcting distorted signals in frequency is employed. We obtain a satisfactory result that show good agreement between uncorrected data and corrected data, and the accuracy of the experimental data is very high after corrected. Furthermore, when the measuring point is too much, the install and maintenance of restrictor will cost much more time, and the correcting signals based on measurement in frequency have obvious advantages.