Study On The Optimization Of Structural Modal Testing Station

Model reduction of large-scale structures has been improved and a weight coefficient reflecting the contribution proportion of a higher-order model has been introduced contribution based on the shortcomings of conventional optimization algorithms, with the aim to solve the problem that conventional optimization algorithms do not serve the optimized distribution of large-scale structure observation stations. Therefore, two hybrid optimization algorithms are proposed based on the effective independence method.The observation point distribution effects drawn from the modal kinetic/strained energy coefficient methods based on the effective independence weighted average have been compared with that drawn from the effective independence methods for Guyan reduction based on modal kinetic /strained coefficients and the respectively improved ones through a rocket simulation experiment.Results have shown that both of the two algorithms effectively avoided the emergence of concentrated observation stations, best ensured the contribution of all modal kinetic and strain energy and the requirements that the better-arranged observation station has much more strained energy. Modal tests were also made on the two methods by employing real GARTEUR plane, which showed that the two algorithms guaranteed the completeness and linear independence of monitoring mode. The structural modal observation point optimization and distribution software is developed on the basis of MATLAB language, which is featured with the easy and efficient interface and convenient functions.