The high-end equipment represented by high-end machine tools and aero-engines is the
core component of the national intelligent manufacturing plan, and the mass unbalance is …

Modal testing and analysis is well-established for linear systems. The objective of this paper
is to progress toward a practical experimental modal analysis (EMA) methodology of …

Nonlinear normal modes, which are defined as a nonlinear extension of the concept of
linear normal modes, are a rigorous tool for nonlinear modal analysis. The objective of this …

Identifying the characteristic coordinates or modes of nonlinear dynamical systems is critical
for understanding, analysis, and reduced-order modeling of the underlying complex …

针对航空发动机在运行过程中不平衡振动过大的问题, 采用自动平衡技术进行在线质量补偿,
可有效降低其振动水平. 目前自动平衡技术主要运用于航空发动机结构, 控制算法, 工程应用3 …

The transfer function of a linear mechanical system can be defined in terms of the quadruplet
of state-space matrices (A, B, C, D) that can be identified from input and output …

In this paper, a single-degree-of-freedom dynamic model is described, with displacement-
and velocity-dependent nonlinearities represented by power laws. The model is intended to …

As part of the flutter clearance and aircraft certification process, a Ground Vibration Test
(GVT) was performed on the first Airbus A400M out of production line. The A400M is a …

For lighter, stronger and more flexible aerospace structures, the nonlinear phenomena
observed during ground vibration tests and in-service operations are first sorted out. Two …

This paper shows some important results from a test campaign conducted on the Dardo
Aspect, a wet-laminate full-composite very-light airplane (VLA). Both static and dynamic …