Abstract：For unconstrained damped (UD) structures whose base layer’s damping should not be neglected, revised loss factor formulas are derived based on strain energy method (SEM) and complex stiffness method (CSM) with base layer’s shear deformation considered. Solid models of UD rectangle plates are developed by ANSYS and then harmonic analysis is done. Numerical solutions of structural loss factors are abstained by input power method and SEM. Simulation results show that analytical solutions by SEM and CSM are coincident and are in good agreement with numerical solutions by two FEA methods. The research demonstrates the revised loss factor formulas and helps to improve the prediction of UD structures’ damping characteristics.
吴晴晴;王敏庆. 考虑基底层阻尼的自由阻尼结构损耗因子修正公式[J]. , 2014, 33(13): 204-209.
WU Qing-qing;WANG Min-qing. Modified Loss Factor Formulas for UD Structures with Base Layer’sDamping Considered. , 2014, 33(13): 204-209.
2014, Vol. 33 
