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国防大气环境试验站网建设及试验与评价技术研究
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摘要
大气环境是武器装备面临的主要环境。本文针对大气环境对武器装备全寿命期的影响开展研究。
     从覆盖中国七个气候区,满足武器装备安全、保密和严酷环境试验的要求,构建了研究中心、重点试验站、一般试验站、试验点四个层次组成的国防大气环境试验站网。
     采用标准金属法,中国东南沿海的大气环境腐蚀严酷度为C3、C4级,部分区域超过ISO 9223标准的C5级;用挂片法测试的氯离子沉降速率高于湿烛法;采用润湿时间、氯离子、二氧化硫评定东南沿海的环境腐蚀严酷度分别为τ4~τ5,S0~S1,P0~P1级。
     北京站和万宁站等8个试验站的动态聚类说明它们之间的相似系数很低;年平均温度和雨水pH值等17个环境因素的动态聚类说明它们可分为6类;模糊综合评价方法非常适合产品环境适应性的多指标综合评价;模糊优势分析方法评价材料腐蚀性和环境严酷度具有通用性。
     加速性、模拟性、重现性是评价模拟加速试验与自然大气环境试验的基本原则,并应用这三条原则对616装甲钢模拟加速试验与海洋大气环境暴露试验的相关性进行了研究。
     设计的跟踪太阳反射聚能试验装置,采用日点轨迹跟踪,聚光效率接近8倍的总日辐射,大约6倍的UV辐射,具有黑、白板温度、喷淋、鼓风和离焦控制功能;该试验技术适宜对非金属材料老化的快速考核。
     铀合金在库内贮存腐蚀速率极低,在高湿大气中腐蚀率明显升高,Cl—是其大气腐蚀的主要加速介质,在中、低湿大气中没有明显的应力腐蚀倾向;钢质焊接药筒的现行涂装工艺有效,在包装贮存条件下,不存在局部腐蚀,长贮性能主要取决于涂装和包装的有效性。
The atmospheric environment is main environment that the equipment was confronted with. The dissertation was studied the influence of atmospheric environment to equipment life cycle. The main contents are as follows:
     The main contents are as follows:
     The national defence atmospheric environmental test network was designed to consist of research centre, important test station, general test station and test point and to cover with cold region, cool temperate zoneⅠ、cool temperate zoneⅡ、warm temperate zone、xerothermic region、subtropical and tropical region, its satisfied the needs of safety, secrecy and asperity environmental test.
     There was notability difference of chloride deposition rate between hanging frame method and wet candle method when conspicuous level equal 0.01. The data survey by hanging frame method is bigger than the wet candle method. China southeast littoral corrosivity categories were C3、C4 classified by standard materials corrosion rate ,and wereτ4~τ5 classified by TOW,were S0~S1 classified by Cl- chloride deposition rate,and were P0~P1 classified by SO2 chloride deposition rate.
     The fuzzy dynamic cluster chart of Beijing, Qingdao, Wuhan, Jiangjin, GuangzhouⅠ, GuangzhouⅡ, Qionghai and Wanning station indicate the coefficient of similarity of 8-stations are very low even though two Guangzhou stations become one category when coefficient of similarity equal to 0.76. The fuzzy dynamic cluster chart of 17 environmental factors becomes 6 categories. Fuzzy comprehensive judgment method is especially adapted for multicriteria environmental worthiness comprehensive judgment of 19 kinds of protective coatings. Fuzzy dominance analysis has generality for the evaluation of metal materials corrosivity and the asperity of atmospheric corrosivity from the evaluation of 13 kinds of steels corrosivity and 7 atmospheric stations environmental corrosivity .
     The relativity evaluation principle are accelerativity, simulativity and repeatability between artificial accelerated test and natural exposure, and apply these principle to evaluate relativity of 616 steel artificial accelerate test with natural marine exposure test.
     The test device of sun track and assemble energy by reflex have white and black panel temperature, water spray, blast, focus off control functions, sun tracking accuracy±0.1°,assemble energy efficiency approach 8 times of total solar radiant and 6 times of UV. This technology is especial adapted aging of nonmetallic materials in area of clear air, little pollution and high solar radiant.
     Uranium alloy have very low corrosion rate in storeroom storage, corrosion rate become higher while humidity increase, Cl—is the main corrosion medium and stress corrosion not susceptivity in middle and low humidity atmosphere. Current coating has effective protective for welding steel cartridges. There is not local corrosion in package storage. The storage performance was laid on effective of coating and package.
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