This thesis present the systematic studies on firing accuracy and firing accuracy tactical & technical requirement reasoning for gunnery system . the main contents of the paper are as follows . ( 1 ) definitions and probability distribution expressions for error of fire , error of firing data and error of dispersion are given summarily . methods to compose error of initial firing data and error of dispersion are discussed 本文对远程炮武器系统射击精度及射击精度战术技术指标论证等方面问题进行了深入、系统的分析研究，本文研究工作的主要内容有： ( 1 )概要地讨论了射击误差、诸元误差、散布误差的定义及其概率分布，诸元误差、散布误差及射击误差的合成，分析了射击精度的各种表示法，阐述了火炮武器系统准确度、密集度和首发命中概率的估算方法。
Aimed at tube curve by sun shining , it analyzes and calculates the instance of curve when tube up and down face have difference in temperature , and discourses upon it influenced degree to cannon firing accuracy . for hot spread asymmetry caused tube curve , it explains it ' s form cause . for irregularly hot stress acting tube curve , it stressfully analyzes effect of body tube wall thickness difference 重点分析了身管热弯曲产生机理，针对太阳照射下的身管弯曲，分析计算了身管上下表面存在温度差时的弯曲情况，论述了其对火炮射击精度的影响程度；对于散热不均引起的身管弯曲说明了其形成原因；对于不规则热应力作用下的身管弯曲重点分析了身管壁厚差的作用。
