The simulation in problems of vibration strength of rocket and space hardware

The concept of the current system ensuring strength of the rocket and space hardware under the vibration loading is described. The role of the finite-element dynamic model of the design at each stage of product development is shown. The use of a model in calculation, theoretical and experimental works is demonstrated. The principles of the model construction are stated. These principles are formulated for most convenient model application in an iterative process of the structure design and calculation. Complexity and special feature of the specific constructions simulation, the methods of refining the model parameters, model tuning and its verification are shown. Every issue is posed in the perspective of vibration strength problems. The possibilities of modern computer technology and universal software systems for solving the problem of dynamic effects on the structure are presented. The special features of the dynamic simulation of loading processes of experimental product (prototype) during the tests are presented. For the tests simulation the development of the specific models of prototype and equipment is required. Examples of the dynamic simulation of the automatic spacecraft for Earth remote sensing and space station module are given. The types of finite elements used in the model are described. The results of calculations and measurements during the experimental testing are given. Refinement and adjustment models based on experimental data are shown.