Vibration最新文献_第4页

Evaluation of Multi-Compartment Particle Dampers for the Attenuation of Dynamic Vibrations 多隔室粒子阻尼器对动态振动衰减的评价

Vibration Pub Date : 2023-07-14 DOI: 10.3390/vibration6030034

A. Papalou

引用次数: 0

Annoyance Caused by Simultaneous Noise and Vibration in Commercial Vehicles: Multimodal Interaction and the Effects of Sinusoidal Components in Recorded Seat Vibrations 商用车噪声和振动同时引起的烦恼：多模态相互作用和记录的座椅振动中正弦分量的影响

Vibration Pub Date : 2023-07-13 DOI: 10.3390/vibration6030033

Maria Mareen Maravich, Robert Rosenkranz, M. Altinsoy

{"title":"Annoyance Caused by Simultaneous Noise and Vibration in Commercial Vehicles: Multimodal Interaction and the Effects of Sinusoidal Components in Recorded Seat Vibrations","authors":"Maria Mareen Maravich, Robert Rosenkranz, M. Altinsoy","doi":"10.3390/vibration6030033","DOIUrl":"https://doi.org/10.3390/vibration6030033","url":null,"abstract":"Noise and whole-body vibrations (WBV) inside commercial vehicles can lead to annoyance and reduced comfort. As a result, negative effects on the driver can occur even below the legal exposure limits. In order to understand the annoyance perception and the interaction between noise and WBV, two perception experiments were conducted. For both experiments, recorded signals inside different commercial vehicles were used. Sound pressure and acceleration levels varied. In addition, the frequency content of the recorded vertical seat vibrations was reproduced in different modified variants. The varied parameters (sound pressure level, acceleration level and vibration frequency) were investigated within a three-factorial experimental design. It was found that noise and vibration levels, as well as the vibration spectrum, had a significant effect on total annoyance. Furthermore, an interaction between noise and vibration levels in both experiments could be observed. The results show that for the highest noise level, changing vibration exposure influences annoyance ratings less than the lowest noise level. The results also show that despite the same Wk-weighted RMS level of the WBV according to ISO 2631-1, vibration spectra with sinusoidal components or narrowband vibrations below <10 Hz were significantly perceived as more annoying during a ride in a vehicle.","PeriodicalId":75301,"journal":{"name":"Vibration","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47147373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of the Suspension Model in the Simulation of the Vertical Vibration Behavior of the Railway Vehicle Car Body 悬架模型对铁道车辆车体垂向振动特性仿真的影响

Vibration Pub Date : 2023-07-04 DOI: 10.3390/vibration6030032

M. Dumitriu, Ioana Izabela Apostol, D. I. Stănică

{"title":"Influence of the Suspension Model in the Simulation of the Vertical Vibration Behavior of the Railway Vehicle Car Body","authors":"M. Dumitriu, Ioana Izabela Apostol, D. I. Stănică","doi":"10.3390/vibration6030032","DOIUrl":"https://doi.org/10.3390/vibration6030032","url":null,"abstract":"The evaluation of the vibration behavior of railway vehicle car bodies based on the results of numerical simulations requires the adoption of an appropriate theoretical model of the suspension which considers the important factors that influence the vibration level of the car body. In this paper, the influence of the secondary suspension model on the vertical vibration behavior of the railway vehicle car body is investigated, based on the results of numerical simulations on the frequency response functions of the acceleration, the power spectral density of the acceleration and the root mean square of the acceleration of the car body. Numerical simulation applications are developed based on a rigid-flexible coupled vehicle model with seven degrees of freedom, corresponding to car body vibration modes: bounce, pitch, and first vertical bending mode, and bogie vibration modes: bounce and pitch. Four different models of secondary suspension are integrated into the vehicle model, namely a reference model and four analysis models. Analysis models include systems through which the pitch vibration of the bogies is transmitted to the car body, influencing its vibration behavior and, respectively, a system that takes the relative angular displacement between the car body and the bogie and a system that models the transmission system of the longitudinal forces between the bogie and the car body are analyzed. The effects of these two systems on the vibration behavior of the railway vehicle car body are analyzed both for each system separately and together. In the conclusions of the paper, the influence of the secondary suspension model on the vibration level at the resonance frequencies of the vertical bending of the car body and the pitch of the bogie is pointed out. It also highlights the important contribution of the transmission system of the longitudinal forces between the bogie and the car body in transmitting pitch vibrations of the bogies to the car body, with effects on the vibration level of the car body at high speeds.","PeriodicalId":75301,"journal":{"name":"Vibration","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43754075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

State-of-the-Art Review on the Seismic Performance Assessment of On-Ground Steel Cylindrical Tanks 地面钢圆柱储罐抗震性能评价研究进展

Vibration Pub Date : 2023-06-29 DOI: 10.3390/vibration6030031

M. Razzaghi

引用次数: 0

Numerical Approach to Optimize the Dynamic Behaviour of Structures Considering Structural Durability 考虑结构耐久性优化结构动力特性的数值方法

Vibration Pub Date : 2023-06-29 DOI: 10.3390/vibration6030030

W. Kaal, J. Baumgartner, Maximilian Budnik, C. Tamm

引用次数: 0

Ultrasonic Signal Time-Expansion Using DAC Frequency Modulation 基于DAC频率调制的超声信号时间扩展

Vibration Pub Date : 2023-06-27 DOI: 10.3390/vibration6030029

M. Rossi, Marco Frasca

引用次数: 0

Vibration Therapy for Cancer-Related Bone Diseases 振动疗法治疗癌症相关骨病

Vibration Pub Date : 2023-06-08 DOI: 10.3390/vibration6020028

Xin Song, A. Sassi, Kimberly Seaman, Chun-Yu Lin, L. You

{"title":"Vibration Therapy for Cancer-Related Bone Diseases","authors":"Xin Song, A. Sassi, Kimberly Seaman, Chun-Yu Lin, L. You","doi":"10.3390/vibration6020028","DOIUrl":"https://doi.org/10.3390/vibration6020028","url":null,"abstract":"Patients undergoing cancer treatments and/or suffering from metastatic bone lesions experience various skeletal-related events (SREs), substantially reducing functional independence and quality of life. Therefore, researchers are working towards developing new interventions by harnessing the bone’s innate anabolic response to mechanical stimulations. Whole body vibration (WBV) has recently gained interest due to its nature of being safe, effective, and easy to perform. In this review, we will summarize the most cutting-edge vibration studies of cancer models and bone-cancer cell interactions. We will also discuss various parameters, including age, vibration settings, and differences between bone sites, which may affect vibration efficacy. Studies have shown that WBV improves bone mineral density (BMD) and bone volume in patients and mice with cancer. WBV also reduces tumor burden and normalizes bone vasculature in mice. At the cellular level, vibration promotes interactions between bone cells and cancer cells, which reduce osteoclastogenesis and inhibit cancer metastatic potential. Hence, WBV could potentially serve as a new intervention or adjuvant treatment to attenuate cancer progression while preserving bone health.","PeriodicalId":75301,"journal":{"name":"Vibration","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48121580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing the Welfare of Technicians during Transits to Offshore Wind Farms 评估技术人员在过渡到海上风电场期间的福利

Vibration Pub Date : 2023-05-28 DOI: 10.3390/vibration6020027

Tobenna D. Uzuegbunam, Rodney Forster, T. Williams

{"title":"Assessing the Welfare of Technicians during Transits to Offshore Wind Farms","authors":"Tobenna D. Uzuegbunam, Rodney Forster, T. Williams","doi":"10.3390/vibration6020027","DOIUrl":"https://doi.org/10.3390/vibration6020027","url":null,"abstract":"Available decision-support tools rarely account for the welfare of technicians in maintenance scheduling for offshore wind farms. This creates uncertainties, especially since current operational limits might make a wind farm accessible but the vibrations from transits might be unacceptable to technicians. We explore technician exposure to vibration in transit based on the levels of discomfort and the likelihood of seasickness occurring on crew transfer vessels (CTVs). Vessel motion monitoring systems deployed on CTVs operating in the North Sea and sea-state data are used in a machine learning (ML) process to model the welfare of technicians based on operational limits applied to modelled proxy variables including composite weighted RMS acceleration (aWRMS) and motion sickness incidence (MSI). The model results revealed poor to moderate performance in predicting the proxies based on selected model evaluation criteria, raising the possibility of more data and relevant variables being needed to improve model performance. Therefore, this research presents a framework for an ML approach towards accounting for the wellbeing of technicians in sailing decisions once the highlighted limitations can be addressed.","PeriodicalId":75301,"journal":{"name":"Vibration","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48362140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vibration Distribution Measurement of Car Door and Engine Head Using OPPA Vibration Distribution Analyzer 用OPPA振动分布分析仪测量车门和发动机头部的振动分布

Vibration Pub Date : 2023-05-03 DOI: 10.3390/vibration6020026

Mona Yadi, Y. Morimoto, Y. Takaya

{"title":"Vibration Distribution Measurement of Car Door and Engine Head Using OPPA Vibration Distribution Analyzer","authors":"Mona Yadi, Y. Morimoto, Y. Takaya","doi":"10.3390/vibration6020026","DOIUrl":"https://doi.org/10.3390/vibration6020026","url":null,"abstract":"In order to address the issue of vibration, it is crucial to accurately measure the vibration distribution. The authors previously developed the one-pitch phase analysis (OPPA) method, which allows for rapidly capturing the three-dimensional shape of a flat object. By integrating this method into a system, an OPPA vibration distribution measurement system was created, utilizing a line light source consisting of LEDs or optical fibers and also a high-speed camera to measure the vibrations of three-dimensional objects without physical contact. To further extend the application of the OPPA method to larger objects, such as cars, in this paper, a new system is introduced using a commercially available projector using a liquid crystal display (LCD) instead of a liner light source and a glass grating. This new system, which employs an ultra-short throw projector, is highly sensitive in displacement measurements and provides a wide-area analysis. These kinds of projectors produce noises at the frequency of the cooling fan and the refresh rate of the LCD. However, in this study, these noise sources were also examined. The capabilities of the new system are demonstrated through its application to the measurement of vibrations in a car door and an engine head. The measurement system and examples of its application are presented.","PeriodicalId":75301,"journal":{"name":"Vibration","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46766118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Basic Study on Mechanical Vibration Suppression System Using 2-Degree-of-Freedom Vibration Analysis 基于二自由度振动分析的机械减振系统基础研究

Vibration Pub Date : 2023-05-01 DOI: 10.3390/vibration6020025

K. Ikeda, K. Kamimori, I. Kobayashi, J. Kuroda, Daigo Uchino, K. Ogawa, A. Endo, T. Kato, Xiaojun Liu, M. H. Peeie, H. Kato, T. Narita

引用次数: 0