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起落架结构是飞机上最复杂最重要的结构之一,传统的设计方法依靠人工经验反复迭代,没有充分利用结构优化技术,具有设计周期长且不能最大限度得到最优设计的缺点。根据结构优化技术的发展,提出了优化驱动的起落架结构设计方法,实现了优化驱动的设计方法在起落架领域的完整工程应用。结构优化技术作为整个设计流程的驱动者,在其中发挥贯穿全程的主体作用,根据不同设计阶段的需求,先后运用拓扑优化、尺寸优化和形状优化技术。以某型飞机前起落架外筒的设计为例可以发现,相比传统设计方法,新方法在相同的设计约束条件下,能更快得到设计方案,结构质量减少了24.1%,实现了起落架结构的快速设计和轻量化设计。
The landing gear structure is one of the most complex and important structures on the aircraft. The traditional design method relies on human experience repeatedly iteratively, and does not make full use of the structural optimization technology. It has the disadvantage that the design cycle is long and the optimal design can not be maximized. According to the development of structural optimization technology, the optimization design of landing gear structure is put forward, and a complete engineering application of the optimized driving design method in the landing gear field is realized. Structural optimization technology, as the driver of the whole design process, plays the main role throughout the whole process. According to the requirements of different design stages, topology optimization, size optimization and shape optimization are successively applied. Taking the design of the nose gear of a certain type of aircraft as an example, it can be found that the new method can get the design scheme faster and reduce the quality of the structure by 24.1% under the same design constraint compared with the traditional design method, Quick design of the structure and lightweight design.