Effects of test fixture connections and interference of the BARC structure on its dynamical responses

Takeshita, A.; Sedillo, H.; Jankowski, K.; Barba, Jesús; Bouma, Adam; Billingsley, Ethan; Abdelkefi, Abdessattar

doi:10.1016/j.ijmecsci.2022.107186

Cited by 5 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Researchers have heavily studied the BARC system since its inception and many variations in experimental setup exist in the literature, one of the most notable being the variations in boundary conditions between the BARC and shaker [ 14 , 15 , 16 , 17 ]. These variations present a challenge for researchers to compare results as shown in [ 18 ] where the authors proved that decreasing the distance between bolted joints connecting the box assembly significantly decreases the resulting natural frequencies of the system and may cause contact nonlinearities with the fixture.…”

Section: Introductionmentioning

confidence: 99%

Insights on the Impacts of Accelerometer Location on the Dynamics and Characteristics of Complex Structures

Takeshita,

Madrid,

Granillo

et al. 2023

Sensors

View full text Add to dashboard Cite

There exists a high level of difficulty in understanding the physical responses of complex dynamical systems. To this end, researchers have previously used different measurement techniques, such as displacement sensors or accelerometers, in the laboratory to capture a system’s dynamics. A well-known structure in the literature is the Box Assembly with Removable Component (BARC) whose purpose is to gain a deep understanding of testing complex systems. Further breaking down the structure, the Removable Component (RC) portion is often used as a relatively simplified version which retains significant complexity from the original system. However, the placement of accelerometers on the RC have varied greatly throughout the literature which presents a challenge in comparing results and may not accurately represent the system’s dynamics. Finite Element Analysis (FEA) is performed for three common accelerometer locations to determine how their placement affects the frequencies and mode shapes for the RC and results are compared against those without accelerometers. Free vibration experiments are carried out to understand the variation of frequencies and damping for each accelerometer location to obtain the overall response for the first mode of vibration. Next, random vibration experiments are run to gain insight on the interaction between linear and nonlinear responses based on excitation level, while showing the influence of an accelerometer’s location on system dynamics. The results demonstrate that the location of the accelerometer is highly influential on the linear and nonlinear characteristics of the system. It is proved that for the first mode of vibration, nonlinear softening and nonlinear damping behaviors may take place due to the interaction between the location of accelerometers, direction of excitation, and response axis analyzed.

show abstract

Section: Introductionmentioning

confidence: 99%

Insights on the Impacts of Accelerometer Location on the Dynamics and Characteristics of Complex Structures

Takeshita,

Madrid,

Granillo

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

A Genetic Algorithm-Based Optimization Approach for Fixture Design that Preserves Desired Dynamic Response Characteristics

Meyer,

Koester,

Joshua

et al. 2023

Conference Proceedings of the Society for Experimental Mechanics Series

View full text Add to dashboard Cite

Avi̇yoni̇k Ürün Doğrulamasinda Ti̇treşi̇m Fi̇kstürü Tasarimi

YILDIRIM,

MERAL,

GÜVEN

et al. 2023

UUJFE

View full text Add to dashboard Cite

Bu çalışma kapsamında, havacılık sektöründe kullanılan aviyonik bir ürün için, titreşim fikstürü tasarlanarak doğrulanmıştır. Sonlu elemanlar yöntemi kullanılarak modal analizler gerçekleştirilmiştir. Modal analizlerle tasarımı doğrulanan model, üretildikten sonra titreşim testlerine tabi tutulmuştur. Titreşim testleri esnasında ivmeölçerler yardımıyla veri toplanarak analiz sonuçları ile karşılaştırmalı olarak sunulmuştur. Korelasyonu sağlanan analiz ve test sonuçları ile titreşim fikstür tasarımının uygunluğu değerlendirilmiştir.

show abstract

Effects of test fixture connections and interference of the BARC structure on its dynamical responses

Cited by 5 publications

References 14 publications

Insights on the Impacts of Accelerometer Location on the Dynamics and Characteristics of Complex Structures

Insights on the Impacts of Accelerometer Location on the Dynamics and Characteristics of Complex Structures

A Genetic Algorithm-Based Optimization Approach for Fixture Design that Preserves Desired Dynamic Response Characteristics

Avi̇yoni̇k Ürün Doğrulamasinda Ti̇treşi̇m Fi̇kstürü Tasarimi

Contact Info

Product

Resources

About