结构系统完全性分析技术研究
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摘要
本文从现代产品的质量观点，指出研究武器装备完全性的必要性。给出了飞机结构、发动机和机械设备的完全性参数要求和定义。同时也分析了完全性参数相关的影响，并通过对飞机机翼加劲板的损伤容限和耐久性的研究，给出相关分析的定量计算结果。最后对武器装备提出落实完全性参数的措施。本文的研究，为其它(本文未提到)产品的完全性定性和定量分析提供了思路和方法。本文的主要工作总结如下：
(1)通过对完全性的研究，首次给出了飞机结构、发动机和机械设备的完全度定义和完全性参数要求；
(2)提出了结构的完全性定量研究的思路和方法(保证飞机结构在使用期间的安全性和维修的经济性条件下，即：满足飞机结构系统损伤容限设计要求和满足耐久性设计要求)；
(3)编制了求解机翼结构加筋板铆钉力的计算机程序，由例题计算表明选取的模型是合理的、计算是有效的；
(4)进行大量的结构损伤容限分析和耐久性分析，确定了结构系统的主要失效模式，并考虑失效模式间的相关性。最后，采用Ditlevsen二阶窄边界公式计算出结构系统的完全度的上下界，提出了以完全度边界的均值作为结构完全度的方法，首次给出了结构系统的完全度。
(5)对于飞机结构、发动机和机械设备给出并规范了落实完全性参数的措施，对提高我国武器装备的效能具有现实意义。
According to the quality viewpoint in product of modern times, the necessity of studying weapon equipment integrity is point out. In this paper, the definitions and demands of integrity parameter for aeroplane structures, engines and mechanism equipments are given. And the effect of integrity parameter correlative is analyzed. By studying the damage tolerance and durability of aeroplane wings and strengthened planes, the quantitative result of correlative analysis is given. Finally, for weapon equipments, the measure of fulfilling integrity parameter is put forward. Then, the study offers a way for other products' integrity qualitative and quantitative analysis. The mostly tasks are as follows:
(1) By studying the integrity, the definitions and demands of integrity parameter for different structures are given.
(2) The study offers a way for the integrity quantitative analysis. (For aeroplane structures, guarantying the safety and economical maintain in used period, namely, satisfying the demands of damage toleranc'e design and durability design.)
(3) For aeroplane wings and strengthened planes, the computation procedures of the stress intensity factors are worked out. The example computation result showed that the chosen model is reasonable and effective.
(4) For the structures system, by plentiful analyses of damage tolerance and durability, significant failure modes are identified. And the correlation of failure modes is considered. Then, by the method of Ditlevnsen's narrow reliability bounds, the structural system integrity-probability is calculated.
(5) For aeroplane structures, engines and mechanism equipments, the
measure of fulfilling integrity parameter is put forward. It is a practical meaning for advancing the efficiency of weapon equipments.
(1)通过对完全性的研究，首次给出了飞机结构、发动机和机械设备的完全度定义和完全性参数要求；
(2)提出了结构的完全性定量研究的思路和方法(保证飞机结构在使用期间的安全性和维修的经济性条件下，即：满足飞机结构系统损伤容限设计要求和满足耐久性设计要求)；
(3)编制了求解机翼结构加筋板铆钉力的计算机程序，由例题计算表明选取的模型是合理的、计算是有效的；
(4)进行大量的结构损伤容限分析和耐久性分析，确定了结构系统的主要失效模式，并考虑失效模式间的相关性。最后，采用Ditlevsen二阶窄边界公式计算出结构系统的完全度的上下界，提出了以完全度边界的均值作为结构完全度的方法，首次给出了结构系统的完全度。
(5)对于飞机结构、发动机和机械设备给出并规范了落实完全性参数的措施，对提高我国武器装备的效能具有现实意义。
According to the quality viewpoint in product of modern times, the necessity of studying weapon equipment integrity is point out. In this paper, the definitions and demands of integrity parameter for aeroplane structures, engines and mechanism equipments are given. And the effect of integrity parameter correlative is analyzed. By studying the damage tolerance and durability of aeroplane wings and strengthened planes, the quantitative result of correlative analysis is given. Finally, for weapon equipments, the measure of fulfilling integrity parameter is put forward. Then, the study offers a way for other products' integrity qualitative and quantitative analysis. The mostly tasks are as follows:
(1) By studying the integrity, the definitions and demands of integrity parameter for different structures are given.
(2) The study offers a way for the integrity quantitative analysis. (For aeroplane structures, guarantying the safety and economical maintain in used period, namely, satisfying the demands of damage toleranc'e design and durability design.)
(3) For aeroplane wings and strengthened planes, the computation procedures of the stress intensity factors are worked out. The example computation result showed that the chosen model is reasonable and effective.
(4) For the structures system, by plentiful analyses of damage tolerance and durability, significant failure modes are identified. And the correlation of failure modes is considered. Then, by the method of Ditlevnsen's narrow reliability bounds, the structural system integrity-probability is calculated.
(5) For aeroplane structures, engines and mechanism equipments, the
measure of fulfilling integrity parameter is put forward. It is a practical meaning for advancing the efficiency of weapon equipments.
引文
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[18] Rosenblatt M. Remarks on a Multivariate Transformation. Anna of Math. Div. ASCE, 1967.93
[19] Hohenbichler M., Rackwitz R., Non-Normal Dependent Vectors in Structural Safety ASCE, J. Eng. Mech. Div., 1981, 107,1227-1238
[20] 吴世伟，李恒云．简单平面刚架体系可靠度分析方法的探讨．结构安 全度与可靠度分析论文集．河海大学出版社，1988． 1
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[25] Ang A H-S, Amin M. Reliability of Structures and Structural Systems, J. Eng. Mech. Div., ASCE, 1968, 94,671-691
[26] Ang A H-S, Abdelour J, Chaker A A, Analysis of Activity Networks under Uncertainty, J. Eng. Mech. Div., ASCE, 1975,101, 373-387
[27] Ang A H-S, Tang W. H. Probability Concepts in Engineering Planking and Design. Vol. 1 & 2, John Wiley & Sons, New York, 1975 & 1984
[28] 美国军用标准(MECSIP)．MIL-STD-1798
[29] Hisada T, Nakagiri S. Stochastic finite element analysis of uncertain struct. system. Proc. 4th Int. Conf. on FEM, Australia 1982: 133-138
[30] Yamazzaki F, Shinozuka M, Dasgupta G. Neumann expansion for stochastic finite element analysis. J. Engng. Mech. , ASCE, 114, 1988(8) : 1335-1354
[31] Vanmarcke E. Probabilistic modeling of soil profiles. J. Geotech. Engng, ASCE, 103, 1977(11) : 1035-1053 Vanmarcke E. reliability of earth slopes. J. Geotech. Engng., ASCE, 103, 1977(11) : 1247-1265
[32] Vanmarcke E. Random Fields: Analysis and Synthesis. MIT Press, Cambridge 1983
[33] Vanmarcke E. Random fields: new concepts and engng. applications. Structural Safety Studies (Ed Jame, Yao T P.) ASCE. New York 1985: 7-17
[34] Liu W K, Maui A. Random fields finite element. Int. J Numerical Methods in Engng, 23, 1986(10) : 1831-1845
[35] Takada T, Shinozuka M. Local integration method in stochastic finite element analysis. Proc. Int. Conf. Struct. Safety and Reliability 1989: 1072-1080
[36] Deodatis G. Bounds on response variability stochastic finite element system. J. Engng. Mech., ASCE, 116,1990(3) : 565-585
[37] Spanos P D, Ghanem R. Stechastic finite element expansion for random
media. J. Engng. Mech., ASCE, 115, 1989(5): 1035-1053
[38] Ghanem R, Spanos P D. Polynomial chaos in stochastic finite elements. J. Appl. Mech., ASME, 1990(57): 197-202
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