APPLICATION OF WAVE LETS TO OPTIMAL SHOCK AND IMPACT ISOLATION

The limiting performa nce analysis is used to study the optimal shock and impact isolation of mechanic al systems. The use of wavelets to approximate time-domain control functions is investigated. The formulation for numerical computation is developed. Numerical examples include the optimal shock isolation of a SDOF system and the optimal i mpact isolation of a MDOF system. Computational results show that compactly supp orted wavelets can represent abrupt changes in control functions better than tri gonometric series and considerably increase computational efficiency.

飞机地面载荷若干问题的探讨

从减轻飞机地面载荷、降低飞机结构重量角度出发，对现行国军标ＧＪＢ６７．４－８５（简称新规范）作了详尽的分析和研究。指出通过使用先进的模拟分析方法，。正确理解规范正文的精神，采用合理的计算参数确定地面载荷，代替传统的经验估算一试凑方法，可以实现结构优化设计，实现减轻地面载荷、减轻飞机结构重量的目的，实例计算可减小飞机垂直和水平载荷３０％左右。