Method of Determination and Life Assessment for Life-Limited Parts of Torpedoes
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摘要: 为确保战时鱼雷的高可用性和高成功性, 迫切需要针对维修保障中的有寿件划分及寿命评估开展研究。针对多平台使用特点的鱼雷, 文中以可靠性为中心的维修为理论基础, 分析了鱼雷不同阶段的环境应力类型, 提出了鱼雷的有寿件确定原则及寿命表征参数的选取原则, 并以此为基础, 详细开展了不同分布下的寿命特征函数研究。同时, 基于鱼雷不同寿命数据, 提出了有寿件的评估方法, 并给出了实际应用案例, 为后续制定科学合理的鱼雷维修保障方案提供技术支撑。
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关键词:
- 鱼雷 /
- 有寿件 /
- 寿命评估 /
- 以可靠性为中心的维修理论
Abstract: In order to ensure the high availability and high success of torpedoes in war, it is urgent to carry out research on the division and life assessment of life-limited parts in maintenance support. In view of torpedoes suitable for multiple platforms, based on the reliability-centered maintenance(RCM) theory, the environmental stress of torpedoes at different stages was analyzed. The determination principle and selection principle of life characterization parameters of life-limited parts of torpedoes were proposed. On this basis, the life characteristic functions under different distributions were studied in detail. At the same time, the assessment method of life-limited parts was proposed according to different life data of torpedoes, and a practical application case was given, which provided technical support for the subsequent formulation of scientific and reasonable maintenance support schemes for torpedoes.-
Key words:
- torpedo /
- life-limited parts /
- life assessment /
- reliability-centered maintenance theory
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表 1 典型产品寿命分布类型对照表
Table 1. Comparison of life distribution types of typical products
分布类型 适用产品 指数分布 具有恒定失效率的部件, 无余度的复杂系统, 经老炼试验并进行定期维修的部件。 威布尔分布 某些电容器、滚珠轴承、继电器、开关、断路器、电子管、电位计、陀螺、电动机、发电机、电缆、蓄电池及材料疲劳等。 正态分布 橡胶磨损及某些机械产品。 对数正态分布 电机绕组绝缘、半导体器件、硅晶体管、锗晶体管、旋转叶片及金属疲劳等。 表 2 寿命试验与评估方法适用情况
Table 2. Application of life test and evaluation methods
序号 寿命试验
评估方法工程研制与鉴定
阶段生产与使用阶段 简要说明 1 实验室使
用寿命试验√ 〇 根据合同要求验证产品的初始寿命或规定寿命 2 现场信息法 △ √ 适用于现场使用的产品评估寿命 3 最短寿命
零部件法√ √ 可确定产品初始寿命 4 工程分析
方法△ △ 可确定产品初始寿命 备注: √-适用; △-可选用; 〇-仅设计更改时适用 表 3 理论修正系数(R=0.9)
Table 3. Theoretical correction coefficient(
R=0.9) 情形 修正系数 显著水平 0.1 0.2 0.3 0.4 n=2, m=2 K 3.31 2.76 2.39 2.09 K0 3.55 2.94 2.55 2.28 K1 4.05 3.54 3.24 2.93 n=2, m=2.5 K 2.60 2.26 2.00 1.80 K0 2.76 2.35 2.10 1.90 K1 3.08 2.75 2.51 2.32 备注: n-样本量, m-威布尔分布的形状参数。 表 4 鱼雷设备现场统计数据
Table 4. On-site statistical data of torpedo equipment
${t_{i - 1} } \sim {t_i}$ $ \Delta r\left( {{t_i}} \right) $ $ \Delta k\left( {{t_i}} \right) $ 0 ~ 1 0 3 1 ~ 2 0 5 2 ~ 3 1 4 3 ~ 4 3 6 4~ 5 4 4 5 ~ 6 3 5 6 ~ 7 5 4 7 ~ 8 4 3 表 5 残存比率计算表
Table 5. Residual ratio calculation
$ {t_i} $ $ \Delta r\left( {{t_i}} \right) $ $ \Delta k\left( {{t_i}} \right) $ $ {n_s}\left( {{t_i}} \right) $ $ S\left( {{t_i}} \right) $ $ R\left( {{t_i}} \right) $ 1 0 3 177 1 1 2 0 5 172 1 1 3 1 4 167 0.9941 0.9941 4 3 6 158 0.9820 0.9762 5 4 4 150 0.9746 0.9514 6 5 5 142 0.9666 0.9196 7 5 4 133 0.9647 0.8871 8 6 3 126 0.9548 0.8470 -
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