基于拉依达准则的舰载设备抗冲击薄弱环节判定

舰载设备的抗冲击能力对提高舰船战斗力和生命力有十分重要的意义。通过对冲击载荷作用下舰载设备的动态响应进行统计分析,发现其结构响应的频率特性与对数正态分布十分符合。成功将拉依达准则应用于舰载设备抗冲击薄弱环节的判定。通过与频率计算法进行对比分析,验证了应用拉依达准则对舰载设备抗冲击薄弱环节进行判定的可行性,同时也发现了频率计算法的不足之处。作为算例,分别应用频率计算法和拉依达准则对其抗冲击薄弱环节进行判定。计算结果表明,拉依达准则判定法的计算结果更加准确而全面。

Weak Link Determination of Anti-shock Performance of Shipboard Equipments Based on Pauta Criterion

The damage risk of shipboard equipments subjected to the impulsive loads poses challenges to the combat capability of naval ships. A study was performed by using Pauta criterion to determine the weak link of anti-shock performance of shipboard equipments when they were exposed to blast impact. Through the statistic analyses on dynamic response of the equipments under these impart loads, the frequency characteristics of structural response were found to be in fair agreement with the logarithm normal distribution. Models of main turbo-generator set of ships were built as a case study on the weak link determination using methods of both the Pauta criterion and the frequency calculation. Pauta criterion shows more feasible for the weak link determination of anti-shock performance and the results more accurate and comprehensive than those by the frequency calculation method.