model updatingreduced order modelstructural identificationCombining the accurate physical description of high‐fidelity mechanical formulations with the practical versatility of low‐order discrete models is a fundamental and open‐ended topic in structural dynamics. Finding a well‐balanced compromise between ...
The above equation represents a mass balance for the acid and contains three components; accumulation, convection, and reaction. For the sake of simplicity, the reaction is assumed to be first order in this model. Similarly, a mass balance for the solid is used to indicate the change of ...
The lumped mass matrix M is trivial to invert because it is diagonal. Each acceleration component is simply calculated as ai = Fi/Mii, which avoids the expense of solving a system of simultaneous linear equations, the single largest computational cost in traditional structural calculations. Since ...
To model a mechanical circuit in the COMSOL® software, the first step is to create the circuit and label all of its ports. For example, if a mass, spring, and damper are connected in parallel, the circuit will be comprised of three ports (1, 2, and 3). Mass can be assigned betw...
Model structure shows that the energy converts from electrical energy to mechanical energy, then to fluidic/acoustic energy, and finally to kinetic energy, as described in Figure 1(b). The droplet generator structure can be characterized by equivalent acoustic mass (representing stored kinetic energy...
The main motive in this work is to consider a standard structural configuration such as a cantilever structure model having a wide range of frequencies (Hz to few MHz) and analyse calculation accuracy on a given mesh. We present here a comparison of the consistent and lumped mass matrix ...
This paper illustrates the application of negative lumped masses in the analytical model to account for the experimental lumped masses.Dean M. FordShaling H. StarrIMAC-XIX: A Conference on Structural Dynamics
Saitoh M. On the performance of lumped parameter models with gyro-mass elements for the impedance function of a pile-group supporting a single-degree-of-freedom system. Earthquake Engineering & Structural Dynamics 2012; 41(4): 623-641. DOI: 10.1002/eqe.1147....
This brief note examines the lumped dynamic modeling of two simple structural systems: 3D-printed cantilevers, and circular aluminum panels. In each case a set of stiffness and natural frequency measurements are made based on simple experiments, with a view to examining effective mass, and a comp...
The test setup is a mass-spring-damper representation of a quarter car test rig used in the automotive industry for durability tests [26]. Section 5.1 describes the test setup. Section 5.2 presents the nonlinear model structure for the test setup and discusses the identification of the model ...