关键词: 支撑力分布, 桁架结构, 优化设计, 启发式算法

Abstract: To satisfy the demand of implementation of specific loads distribution planning in some truss design,an automated method was proposed to design truss assemblies with specific load distribution at fixed joints.With this method,a series of parameters was searched to minimize the difference between the current and required load distribution.An algorithm deduced from global stiffness equations was introduced to guide the searching process.Owing to the fact that section areas were the primary searching parameters,applied external forces were also considered as important factors.A concept known as maximum permissible deviation was introduced to ascertain the search scope for these external forces.The effectiveness of the method was verified with two examples.The results suggested that the proposed method could distribute loads based on practical requirements.A comparison with a traditional heuristic algorithm indicated that the proposed method was more efficient in certain implementations.

Key words: loads distribution, truss structure, design optimization, heuristic algorithms