论文部分内容阅读
1.前言进排气消声器因可作为声响滤波器,所以能从声响学上来处理,而且在这方面的研究已经很多了。尽管这是自然而然的事,但特别在排气消声器方面已超出了声响学的范围,有许多问题必须要借助于热力学和流体力学来解决,因而在这方面逐渐发展理论分析和试验研究。1966年3月,根据 JIS—D1616制定了装在台架上和车辆上的排气消声器试验方法。又由于以前有考虑利用模拟声源来单独地对消声器进行试验,所以就为了解决声响学试验和发动机试验的矛盾,而进行了种种尝试。
1. Introduction Intake and exhaust muffler can be used as a sound filter, so acoustically to deal with, and in this area has been a lot of research. Although this is a natural occurrence, it has gone beyond acoustics, especially in exhaust mufflers. Many problems have to be solved by means of thermodynamics and fluid mechanics. Therefore, theoretical analysis and experimental studies have been gradually developed in this respect. March 1966, according to JIS-D1616 developed on the bench and on the exhaust muffler test method. Since the muffler has been separately tested using an analogue sound source in the past, various attempts have been made to solve the contradiction between the acoustics test and the engine test.