【摘要】 机-弹耦合系统在着陆阶段会经历短时冲击过程，采用传统有限元方法对该过程进行仿真分析往往存在模型规模庞大的问题，并且在进行模型对接时还具有模型传递壁垒的问题。脉冲子结构法（IBS）在处理瞬态动响应分析问题时具有较强的适用性，但该方法在生成脉冲响应函数矩阵时会耗费大量计算资源。因此，本文对传统的脉冲子结构法加以扩展，提出一种脉冲子结构与模态域子结构混合空间的子结构综合方法（IBS-CB），并建立了一种适用于该方法的主模态选取准则。通过机-弹耦合系统着陆动力学数值算例分析，验证了本文所提多域子结构综合法的有效性，计算结果显示本方法在保持高精度的同时可以大幅提高计算效率。更多还原

【Abstract】 The aircraft-missile coupling system undergoes a short-duration impact process during the landing phase. When simulating and analyzing this process using the traditional finite element method,there often exist problems such as the large scale of the finite element model and model transfer barriers between different departments. The impulse-based substructure(IBS) method demonstrates strong applicability in handling transient dynamic response analysis problems,but this method consumes substantial computational resources when generating the impulse response function matrix. Therefore, this paper extends the traditional impulse-based substructure method, proposes a hybrid coordinates substructure synthesis method combining impulse-based substructure and modal-domain substructure(IBS-CB),and establishes a dominant mode selection criterion suitable for this method. Through a numerical case study on the landing dynamics of the aircraft-missile coupling system,the effectiveness of the multi-domain substructure synthesis method proposed in this paper is verified. The calculation results show that this method can significantly improve computational efficiency while maintaining high accuracy.更多还原