基于PULSE的食品制冷机组隔振系统声强试验分析

以食品制冷机组压缩机隔振系统为研究对象,依据ISO 9614——1:1993《声学-用声强法测定噪声源的声功率级-第1部分:离散点上的测量》标准,采用pulse软件对其进行声强检测试验。通过对试验数据进行横向对比分析,讨论不同隔振装置以及不同中间质量对隔振性能的影响。研究结果可为后续食品制冷机组压缩机减振降噪研究提供借鉴。

结构振动声强法研究及应用

振动声强技术通过绘制功率流矢量图和流线图来分析结构噪声源及能量传播路径,可以清晰体现振动声能的分布和传播。对振动和噪声控制具有重要的理论意义和应用前景。本文总结了振动声强试验和理论计算技术的发展,并推导了受迫振动板中声强分量与振动能量的数学关系;最后对振动声强法在复杂结构振动功率流控制和结构损伤识别中的应用进行了展望。

Analysis on the mechanism and characteristics of concrete strength testing methods

This paper mainly described five kinds of common detection methods, including the test block method, core drilling method, rebound method, dialing out method and ultrasonic testing method and systematically analyzed the mechanism of all kinds of concrete strength detection methods as well as their advantages and disadvantages, which would provide a guide for construction personnel and research institutions to choose an economical ,accurate and safe detection method.