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In order to control the audio frequency vibration and extend the absorbency range of dynamic vibration absorber, based on the study of wide band straight beam vibration absorber, the twist-beam dynamic vibration absorber is studied in this paper.

为了满足对声频振动控制的要求,拓宽动力吸振器的吸振频率范围,本文在对直梁宽频带动力吸振器研究的基础上,研究了螺旋曲梁式动力吸振器。

The acoustic frequency characteristic formatted from the underwater burning of pyrotechnic composition was also studied with the testing system for underwater acoustic.

为研究一种新型的水声无源干扰材料,采用水声测试系统,对具有脉动燃烧效应的烟火药的水中燃烧进行了试验研究,测试了所形成的声频特性,并探讨了其形成的原因。