Application of viscous and Iwan modal damping models to experimental measurements from bolted structures

BJ Deaner, MS Allen, MJ Starr… - … of Vibration and …, 2015 - asmedigitalcollection.asme.org
Measurements are presented from a two-beam structure with several bolted interfaces in
order to characterize the nonlinear damping introduced by the joints. The measurements (all …

Application of quasi-static modal analysis to a finite element model and experimental correlation

E Jewell, MS Allen, I Zare, M Wall - Journal of Sound and Vibration, 2020 - Elsevier
Bolted joints not only provide critical connections in assembled structures but are also a
significant source of damping. The damping induced by joints is often nonlinear, which is …

Nonlinear characterization of a bolted, industrial structure using a modal framework

DR Roettgen, MS Allen - Mechanical Systems and Signal Processing, 2017 - Elsevier
This article presents measurements from a sub assembly of an off-the-shelf automotive
exhaust system containing a bolted-flange connection and uses a recently proposed modal …

A numerical study on the limitations of modal Iwan models for impulsive excitations

RM Lacayo, BJ Deaner, MS Allen - Journal of Sound and Vibration, 2017 - Elsevier
Structures with mechanical joints are difficult to model accurately. Even if the natural
frequencies of the system remain essentially constant, the damping introduced by the joints …

[PDF][PDF] Quasi-static Modal Analysis based on Implicit Condensation for Structures with Nonlinear Joints.

MS Allen, RM Lacayo, MR Brake - 2016 - osti.gov
Significant insight can be gained into the dynamics of a structure with bolted interfaces by
observing the change in the effective modal natural frequency and damping of each mode of …

Parameter estimation and investigation of a bolted joint model

OV Shiryayev, SM Page, CL Pettit, JC Slater - Journal of Sound and …, 2007 - Elsevier
Mechanical joints are a primary source of variability in the dynamics of built-up structures.
Physical phenomena in the joint are quite complex and therefore too impractical to model at …

Modal analysis of jointed structures

DD Quinn - Journal of Sound and Vibration, 2012 - Elsevier
Structural systems are often composed of multiple components joined together at localized
interfaces. Compared to a corresponding monolithic system these interfaces are designed to …

Observations of modal coupling due to bolted joints in an experimental benchmark structure

M Wall, MS Allen, RJ Kuether - Mechanical Systems and Signal Processing, 2022 - Elsevier
The goal of this paper is to present a set of measurements from a benchmark structure
containing two bolted joints to support future efforts to predict the damping due to the joints …

Updating structural models containing nonlinear Iwan joints using quasi-static modal analysis

RM Lacayo, MS Allen - Mechanical systems and signal processing, 2019 - Elsevier
Structures with bolted joints are known to exhibit amplitude-dependent shifts in the natural
frequency and damping of its modes that are challenging to model accurately. These two …

A four-parameter Iwan model for lap-type joints

DJ Segalman - 2005 - asmedigitalcollection.asme.org
The constitutive behavior of mechanical joints is largely responsible for the energy
dissipation and vibration damping in built-up structures. For reasons arising from the …