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本文介绍了运载火箭起飞载荷动态分析用的一种新方法。运载火箭用其自由-自由模态表示!并加上发射台连接界面处的残余柔度项。发射台以结构刚度和质量矩阵,或者以模态综合形式加以模拟。这种组合公式对于运载火箭/发射台静态界面是极其精确的,因而能提供精确的界面载荷和瞬态响应。采用极好的数字调节技术能容易地模拟运载火箭从发射台分离情况。惯性坐标系统能确定完整的载荷向量,从而简化了分析和数据校正。
In this paper, a new method for dynamic analysis of launching load is introduced. The launch vehicle is represented in its free-free mod! And adds the residual flexibility term at the launch pad interface. The launch pad is modeled as a structural stiffness and mass matrix, or as a modal synthesis. This combination formula is extremely accurate for the launch vehicle / launch pad static interface and therefore provides accurate interface loading and transient response. The use of superb digital tuning techniques makes it easy to simulate the separation of the launch vehicle from the launch pad. Inertial coordinate system can determine the complete load vector, thus simplifying the analysis and data correction.