隔振缓冲元件轴向拉伸冲击特性检测方法

The detection method for axial tensile shock characteristics of isolators

水下非接触爆炸攻击作用下,隔振缓冲元件必然会产生剧烈的冲击压缩及拉伸响应,大量的实船及模型试验表明轴向拉伸往往会造成比轴向压缩更为严重的后果。但国内对于隔振缓冲元件拉伸条件下的冲击特性研究较少,相关特性参数的缺失已严重影响设备抗冲击能力的设计及计算,需要开展一些探索性的工作。为此,基于落锤冲击法,提出一套有、无预压条件下隔振缓冲元件轴向拉伸冲击特性参数的测试方法,并分别对两种型号的橡胶型隔振器开展拉伸冲击特性检测。通过试验结果与基础冲击法试验结果比对,表明采用落锤冲击法开展隔振缓冲元件轴向拉伸冲击特性的测试是可行的。同时,该文的试验结果也可为选择合适的隔振缓冲元件轴向拉伸和压缩冲击特性参数检测方法提供依据。

Non-contact underwater explosion will produce severe shock compress and tensile response of the isolators. Many real ship and model tests show that axial tensile will cause a more serious consequence than axial compress generally. However, there is very limited research on the shock characteristics of isolators under tensile conditions in domestic, and the lack of the relevant characteristic parameters has severely influenced the design and calculation of impact resistance of equipment. Thus exploratory works should be carried out. Therefore, the detection method of the axial tensile shock characteristics of isolators with and without preload is proposed based on the drop-hammer impact tests and tensile impact characteristics test is also respectively carried out for the two types of rubber isolator. Based on the comparison of test results and foundation impact test results, it shows that detection method of the axial tensile impact characteristics of the isolator based on the drop-hammer impact test is feasible and the test results can also provide basis for choosing an appropriate detection method for axial tensile and compression impact characteristic parameters of isolators.