Structural dynamics of the large thrust liquid rocket engines
Abstract
<p indent="0mm">The large thrust liquid rocket engines are the main powers for the momentous space activities of manned lunar and deep space exploration. As the thrust of the engine being larger, the challenges for the dynamic strength designing being tougher and the structural dynamic becomes a fundamental science for solving the key technology problems during the engine developing. The characteristics of the significant multi-field coupling and the complex load composition of multi load sources lead the complexity and difficulty for solving structural dynamic problems of the large thrust engines increase dramatically. Based on the review and summary of the fault characteristics of the domestic and foreign liquid rocket engine structures, the rotor dynamics and flow-induced vibration problems of the turbopump, the fluid-structure interaction and dynamic optimization problems, the dynamics problems in thrust chamber and associated solving experiences were discussed emphatically, and also the structural dynamic modeling of the whole engine and the analysis of the load transfer path being introduced. Finally, the structural dynamics analysis required test technologies and associated uncertainties envelope design methodology were presented from a design perspective, and these will be useful and consulted to solve the key technology encountered in the development of the large liquid rocket engine.</p>
