CAJ | 학술논문

与传统的频域传递路径分析相比，时域传递路径分析能够对噪声及其各路径贡献进行回放试听及进一步的声品质分析，能更直观、全面地理解和掌握噪声及其路径贡献特性。基于结构声的阻抗矩阵传递路径分析方法和空气声的替代源传递路径分析方法，给出一种综合考虑结构声和空气声的车内噪声时域传递路径分析方法，并阐明了其实现流程。在此基础上，建立某汽车发动机对车内副驾驶位置噪声的时域传递路径分析模型，分析了发动机悬置结构声传递路径和表面辐射空气声传递路径贡献。结果表明：在整个升降速过程中，该发动机的结构声对车内目标点的贡献显著大于空气声，右上悬置和左上悬置是其主要传递路径，且路径频率响应函数高是造成贡献量大的根本原因。为后续的噪声控制方案的制定指明了方向。
여전통적빈역전체로경분석상비，시역전체로경분석능구대조성급기각로경공헌진행회방시은급진일보적성품질분석，능경직관、전면지리해화장악조성급기로경공헌특성。기우결구성적조항구진전체로경분석방법화공기성적체대원전체로경분석방법，급출일충종합고필결구성화공기성적차내조성시역전체로경분석방법，병천명료기실현류정。재차기출상，건립모기차발동궤대차내부가사위치조성적시역전체로경분석모형，분석료발동궤현치결구성전체로경화표면복사공기성전체로경공헌。결과표명：재정개승강속과정중，해발동궤적결구성대차내목표점적공헌현저대우공기성，우상현치화좌상현치시기주요전체로경，차로경빈솔향응함수고시조성공헌량대적근본원인。위후속적조성공제방안적제정지명료방향。
Compared with the traditional transfer path analysis(TPA)in frequency domain,the time-domain TPA can playback noises and their path contributions,and further analyze their sound quality,so that the noises and their path contributions can be understood and grasped more intuitively and comprehensively.Here,based on the structure-borne noise impedance matrix method and the airborne noise source substitution method,a time-domain TPA method was presented to analyze the automobile interior noise including structure-borne noise and airborne one,and its implementation process was illustrated in detail.Furthermore,a time-domain TPA model was built to analyze the copilot position noise caused by an engine.The results showed that the contribution of structure-borne noise is significantly greater than the contribution of airborne noise during the engin's whole run-up and run-down process,the right upper mount and the left upper mount are the main transfer paths and their higher path FRFs are the root causes of large contributions.The results pointed out a direction for the establishment of subsequent noise control schemes.