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The Shock and Vibration Digest最新文献

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Oil and gas well drilling: A vibrations perspective 油气钻井:振动视角
The Shock and Vibration Digest Pub Date : 2003-03-01 DOI: 10.1177/0583102403035002564
P. Spanos, A. Chevallier, N. Politis, M. Payne
{"title":"Oil and gas well drilling: A vibrations perspective","authors":"P. Spanos, A. Chevallier, N. Politis, M. Payne","doi":"10.1177/0583102403035002564","DOIUrl":"https://doi.org/10.1177/0583102403035002564","url":null,"abstract":"The process of oil well rotary drilling is discussed from a vibrations perspective. Furthermore, a synopsis of the equipment used and of the procedures followed is included. Performance modeling and monitoring are discussed, along with data acquisition and utilization. Axial, torsional, and lateral vibrations are reviewed. Typical operational difficulties such as sticking, buckling, and fatiguing of strings are also reviewed. Finally, emerging techniques of analysis such as stochastic treatment, and optimization are discussed. To enhance the utility of the paper, references readily available in the form of books or archival journal publications are primarily cited. Furthermore, mathematical rigor and phenomenological completeness are sporadically moderated to conform with paper length limitations.","PeriodicalId":405331,"journal":{"name":"The Shock and Vibration Digest","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125649927","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: 105
Limiting performance analysis of impact isolation systems for injury prevention 用于伤害预防的碰撞隔离系统的极限性能分析
The Shock and Vibration Digest Pub Date : 2001-11-01 DOI: 10.1177/058310240103300601
D. Balandin, N. Bolotnik, W. Pilkey
{"title":"Limiting performance analysis of impact isolation systems for injury prevention","authors":"D. Balandin, N. Bolotnik, W. Pilkey","doi":"10.1177/058310240103300601","DOIUrl":"https://doi.org/10.1177/058310240103300601","url":null,"abstract":"A review of recent research on the limiting performance analysis of impact isolation systems for injury prevention is presented. A limiting performance analysis establishes the absolute optimum for a performance index measuring the quality of an isolation system by solving an optimal control problem. Problems related to the optimal design of a crashworthy helicopter seat, automobile seat belts, and sporting helmets are discussed. Best and worst disturbance techniques are also reviewed. These techniques are employed to investigate the responses of injury prevention components to the shape of the impact pulse.","PeriodicalId":405331,"journal":{"name":"The Shock and Vibration Digest","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116868643","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: 6
Excitation of Vibration in Large Structures 大型结构的振动激励
The Shock and Vibration Digest Pub Date : 2001-11-01 DOI: 10.1177/058310240103300602
L. Koss
{"title":"Excitation of Vibration in Large Structures","authors":"L. Koss","doi":"10.1177/058310240103300602","DOIUrl":"https://doi.org/10.1177/058310240103300602","url":null,"abstract":"Vibration exciters (shakers) for low natural frequency structures are reviewed. Relationships are developed between exciter mass imbalance, structural properties, and displacement. A new concept of force frequency shifting is also presented.","PeriodicalId":405331,"journal":{"name":"The Shock and Vibration Digest","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114833878","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: 4
Structural-Acoustic Studies of Sandwich Structures: A Review 夹层结构的结构声学研究综述
The Shock and Vibration Digest Pub Date : 2001-09-01 DOI: 10.1177/058310240103300502
O. Elbeyli, Priya Thamburaj, Jian-Qiao Sun
{"title":"Structural-Acoustic Studies of Sandwich Structures: A Review","authors":"O. Elbeyli, Priya Thamburaj, Jian-Qiao Sun","doi":"10.1177/058310240103300502","DOIUrl":"https://doi.org/10.1177/058310240103300502","url":null,"abstract":"This paper reviews the literature on the structural-acoustic analyses of sandwich structures. Emphasis is on the research done in the past 10 years. Modeling studies of sandwich structures and their solution methods are discussed. Both analytical and experimental studies are included in the review. The research reviewed herein deals with sandwich structures with a soft foam core only. Studies of constrained layer dampers and piezoelectric materials that are also sandwich constructions are not included in this paper. Studies of the hygrothermal effects on these structures are also excluded. Finite element and finite difference analyses of sandwich structures are not covered in this review because they deserve a separate discussion owing to the large number of publications.","PeriodicalId":405331,"journal":{"name":"The Shock and Vibration Digest","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127249111","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: 5
Active Balancing and Vibration Control of Rotating Machinery: A Survey 旋转机械主动平衡与振动控制研究进展
The Shock and Vibration Digest Pub Date : 2001-09-01 DOI: 10.1177/058310240103300501
Shiyu Zhou, Jianjun Shi
{"title":"Active Balancing and Vibration Control of Rotating Machinery: A Survey","authors":"Shiyu Zhou, Jianjun Shi","doi":"10.1177/058310240103300501","DOIUrl":"https://doi.org/10.1177/058310240103300501","url":null,"abstract":"Vibration suppression of rotating machinery is an important engineering problem. In this paper, a review of the research work performed in real-time active balanc- ing and active vibration control for rotating machinery, as well as the research work on dynamic modeling and analy- sis techniques of rotor systems, is presented. The basic methodology and a brief assessment of major difficulties and future research needs are also provided.","PeriodicalId":405331,"journal":{"name":"The Shock and Vibration Digest","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130363707","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: 242
A Comparison of Some Common System-Modeling Approaches 几种常用系统建模方法的比较
The Shock and Vibration Digest Pub Date : 2001-07-01 DOI: 10.1177/058310240103300402
P. Avitabile
{"title":"A Comparison of Some Common System-Modeling Approaches","authors":"P. Avitabile","doi":"10.1177/058310240103300402","DOIUrl":"https://doi.org/10.1177/058310240103300402","url":null,"abstract":"System models can be developed from a variety of sources. Full-space finite element models and reduced-space finite element models are common approximations from an analytical standpoint. Modal models and impedance models are also widely used for the description of experimental systems. Several different system-modeling approaches are reviewed and applicable theory presented. Some similarities between the different techniques are discussed. Results from the different techniques are compared to show similarities and differences using a simple model. Usefulness of each of the techniques from an application standpoint is discussed. Current limitations and future needs are cited in the concluding remarks.","PeriodicalId":405331,"journal":{"name":"The Shock and Vibration Digest","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128749678","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: 3
A perspective on the vibration overtest problem 对振动过度试验问题的看法
The Shock and Vibration Digest Pub Date : 2001-05-01 DOI: 10.1177/058310240103300301
D. Spanos, G. Davis
{"title":"A perspective on the vibration overtest problem","authors":"D. Spanos, G. Davis","doi":"10.1177/058310240103300301","DOIUrl":"https://doi.org/10.1177/058310240103300301","url":null,"abstract":"The traditional vibration test methodology of controlling the interface environment at the test article only to a motion-based specification is often too conservative, inducing potentially excessive vibration responses at hardware resonant frequencies. This problem has been recognized for quite some time, and a synopsis of the various remedial procedures proposed in the literature is presented. Of these, the dual-control or force-limited vibration test has recently emerged as a viable solution for ameliorating overtest conditions on a wide variety of hardware. The underlying theoretical basis of the dual-control technique is derived using Thevenin's and Norton's theorems for equivalent mechanical systems. Practical implementation considerations in selecting the appropriate control variables are also discussed. References are provided to cover this topic and to serve as a useful database for potential new users.","PeriodicalId":405331,"journal":{"name":"The Shock and Vibration Digest","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131316442","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
Bending and Twisting Vibration Control of Flexible Structures Using Piezoelectric Materials 基于压电材料的柔性结构弯曲和扭转振动控制
The Shock and Vibration Digest Pub Date : 2001-05-01 DOI: 10.1177/058310240103300302
R. C. Wetherhold, O. Aldraihem
{"title":"Bending and Twisting Vibration Control of Flexible Structures Using Piezoelectric Materials","authors":"R. C. Wetherhold, O. Aldraihem","doi":"10.1177/058310240103300302","DOIUrl":"https://doi.org/10.1177/058310240103300302","url":null,"abstract":"A number of thin structural elements such as plates, shells, beams, and panels experience both bending and twisting vibration in response to external loadings. To control the vibration and reject disturbances, structural excitation is produced by actuators according to a control law. Of primary importance is the ability to actuate all types of vibration observed (bending, twisting, in-plane, etc.), since observed modes that cannot be actuated can lead to instability. In this paper, possible ways to actuate both bending and twisting are discussed, including structural coupling through the use of orthotropic materials, orthotropic actuators, external masses or stores attached to the structure, and directionally attached piezoelectrics. The importance of having sensors with suitable material symmetry is reviewed. Examples are given on how to excite plate bending and twisting as well as on how to suppress vibration in a beam with structural and/or mass coupling that links bending and twisting.","PeriodicalId":405331,"journal":{"name":"The Shock and Vibration Digest","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125912651","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: 11
Review of two methods for calculating explosive Air blast 爆炸性空气爆炸的两种计算方法综述
The Shock and Vibration Digest Pub Date : 2001-03-01 DOI: 10.1177/058310240103300201
Jeffrey M. K. Chock, R. Kapania
{"title":"Review of two methods for calculating explosive Air blast","authors":"Jeffrey M. K. Chock, R. Kapania","doi":"10.1177/058310240103300201","DOIUrl":"https://doi.org/10.1177/058310240103300201","url":null,"abstract":"Blast profiles and two primary methods of determining them are reviewed for use in the creation of a computer program for calculating blast pressures, which serves as a design tool to aid engineers or analysts in the study of structures subjected to explosive air blast. These methods were integrated into the computer program BLAST.F to generate air blast pressure profiles by one of two methods, that of the Army's Explosions in Air manual and a method outlined by Kingery and Bulmash in their work. These methods were compared after the creation of the program and can conservatively model the effects of spherical air blast and hemispherical surface burst. The code BLAST.F was used in conjunction with a commercial finite element code (NASTRAN) in a demonstration of method on a 30 by 30-inch aluminum 2519 quarter plate of fixed boundary conditions in hemispherical ground burst and showed good convergence with 256 elements for deflection and good agreement in equivalent stresses of a point near the blast between the 256 and 1024 element examples. Application of blasts to a hypothetical wing composed of aluminum 7075-T6 was also conducted showing good versatility of method for using this program with other finite element models.","PeriodicalId":405331,"journal":{"name":"The Shock and Vibration Digest","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122088883","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: 27
Chebyshev polynomials in the study of transverse vibrations of nonuniform rectangular orthotropic plates 非均匀矩形正交各向异性板横向振动研究中的切比雪夫多项式
The Shock and Vibration Digest Pub Date : 2001-03-01 DOI: 10.1177/058310240103300202
R. Lal, U. Gupta, C. Goel
{"title":"Chebyshev polynomials in the study of transverse vibrations of nonuniform rectangular orthotropic plates","authors":"R. Lal, U. Gupta, C. Goel","doi":"10.1177/058310240103300202","DOIUrl":"https://doi.org/10.1177/058310240103300202","url":null,"abstract":"An analysis is presented for free transverse vibrations of thin, rectangular orthotropic plates with thickness varying exponentially in one direction only and resting on an elastic foundation of Winkler type. Following the Levy approach, that is, two parallel edges being simply supported, the fourth order differential equation with variable coefficients governing the motion of such plates has been solved numerically by using the Chebyshev polynomials for three different combinations of clamped, simply supported, and free boundary conditions at the other two edges. The effect of the elastic foundation together with the orthotropy, aspect ratio, and thickness variation on the natural frequencies of vibration is illustrated for the first three modes of vibration. Mode shapes have been presented for two different values of the taper parameter, keeping other plate parameters fixed, for all three boundary conditions. A comparison of the results with those available in literature has been presented.","PeriodicalId":405331,"journal":{"name":"The Shock and Vibration Digest","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127208600","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: 24
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