Download or read book The Development of Dynamic Performance Standards for Civil Aircraft Seats written by Stephen J. Soltis and published by . This book was released on 1995* with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Dynamic Performance Standards for General Aviation Aircraft Seats written by Society of Automotive Engineers, Inc and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seat Dynamic Performance Standards for a Range of Aircraft Sizes Technical Note written by Stephen Soltis and published by . This book was released on 1990 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Methodology for Aircraft Seat Certification by Dynamic Finite Element Analysis written by Prasannakumar Bhonge and published by . This book was released on 2008 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic aircraft seat regulations are identified in the Code of Federal Regulations 1(CFR), 14 CFR Parts 23.562 and 25.562 for crashworthy evaluation of a seat in a dynamic environment. The regulations specify full-scale dynamic testing on production seats. The dynamic tests are designed to demonstrate the structural integrity of the seat to withstand an emergency landing event and occupant safety. The Society of Automotive Engineers (SAE) standard, AS8049, supports detailed information on dynamic seat testing procedures and acceptance criteria. Full-scale dynamic testing in support of certification is expensive and repeated testing due to failures drastically increases the expense. Involvement of impact environments, flexibility in interior configurations and complexity of seat engineering designs make analysis of these problems quite complex, so that classical hand calculations are practically impossible. Efforts have been made to improve the occupant safety and to reduce the testing costs through substantiation via computer modeling analysis techniques. Development in Dynamic Finite Element Analysis (DFEA) methodology helps the aircraft industry in designing and certifying seats and other interiors more economically and confidently. The objective of this study is to provide a methodology for aircraft seat certification by using DFEA techniques. The goal of the Finite Element Analysis (FEA) in product development is not only to design a seat but also to substantiate the certification tests or replace the certification tests. The case of a certification by substantiation tests increases the necessity of validation of the Finite Element model. The US government Advisory Circular (AC) 20-146 demonstrates the methodology for dynamic seat "Certification by Analysis" for use in Parts 23, 25, 27 and 29 airplanes and rotorcraft. This AC provides guidance on how to validate the computer model and under what conditions the model may be used in support of certification or Technical Standard Order (TSO) approval/ authorization and same validation process utilizes in this research work. In the methodology of this dissertation, the seat certification process for business jet aircraft is defined in 3 stages: 1. Evaluation of seat critical options by using a simple FE - one-dimensional (1D) seat model, 2. Non linear FE analysis of seat worst loading condition and validation with the test results, 3. Substantiation of certification test or tests by using validated FE model and updation of the certification plan. Best FE modeling practices for dynamic aircraft seats, material testing procedures and component validation are presented here using nonlinear FE codes such as the LS-DYNA, with two case studies of aircraft passenger seats. Case 1 - Combined Vertical / Longitudinal velocity change dynamic test condition (15g side facing passenger seat - Part 23). Case 2 - Longitudinal velocity change dynamic test condition, (16g forward facing business jet passenger seat - Part 25). Comparisons of the DFEA and test results indicate reasonable correlations, establishing confidence in the DFEA methodology.
Download or read book Analytical Methods for Aircraft Seat Design and Evaluation written by Aircraft SEAT Committee and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SAE Aerospace Recommended Practice (ARP) defines a means of assessing the credibility of computer models of aircraft seating systems used to simulate dynamic impact conditions set forth in Federal Regulations 14 CFR Part 23.562, 25.562, 27.562, and 29.562. The ARP is applicable to lumped mass and detailed finite element seat models. This includes specifications and performance criteria for aviation specific virtual anthropomorphic test devices (v-ATDs). A methodology to evaluate the degree of correlation between a seat model and dynamic impact tests is recommended. This ARP also provides testing and modeling best practices specific to support the implementation of analytical models of aircraft seat systems. Supporting information within this document includes procedures for the quantitative comparison of test and simulation results, as well as test reports for data generated to support the development of v-ATDs and a sample report. For this revision, Section 4, Seat System Validation is held in reserve. Analytical modeling tools have been developed to facilitate design and dynamic evaluation of aircraft seating systems. A principal goal of these modeling efforts is to use the model to accurately predict the results of a physical test. An accurate model could potentially be used to evaluate the seating system in lieu of physical test, saving both development time and cost. A means of establishing confidence in this predictive ability is needed. Towards that end, this document has been developed to define specifications for numerical ATD (Anthropometric Test Device) models suitable for aviation impact test simulations, provide procedures for validation of both lumped mass and detailed finite element seat models, and convey the current best practices to assist engineering analysts in developing efficient, accurate models.
Download or read book A Human Factors Engineering Approach to the Development and Dynamic Evaluation of a Prototype Aircrew Seat for Military Aircraft written by James David Whiteley and published by . This book was released on 1988 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents the results of an investigation which contrasted the currently available C-130A aircrew seat with two custom-made prototype/modified C-130 aircrew seats. Twelve active duty Air Force males participated in a series of dynamic vibration exposure tests which simulated the actual flying environment. Performance tasks, subjective surveys, spinal creep measurements and seat pan pressure measurements were accomplished. Analyses of variance were performed on data collected. Performance was noticeably better, especially during the third period, when subjects were seated in the modified aircrew seats. During the second time period, there were statistically significant differences between the three aircrew seats when performing the Pattern Comparison task. Aircrew general comfort was also responsive to seat type. In each of the three time periods there were statistically significant differences between seat types; the modified aircrew seats being universally favored as the most comfortable seats. There were also significant differences between aircrew body part discomfort results. Both buttock and thigh discomfort proved to be statistically responsive to seat type. In each instance, the current seat was rated as causing far more pain and discomfort than the other seats. From a design standpoint, both the MOD-REG and MOD-CONF received much higher scores than did the current seat.
Download or read book Crash Dynamics Program Transport Seat Performance and Cost Study Benefit Study written by Mark R. Cannon and published by . This book was released on 1986 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the work that was performed to support the Federal Aviation Administration's Crash Dynamics Program. An element of the program was the Controlled Impact Demonstration (CID) of a Boeing 720 aircraft. Work related to the CID involved developing modifications of commercial transport passenger seats to improve their structural crashworthiness, then installing them alongside standard, unmodified seats aboard the test aircraft. This was followed by posttest analyses of the CID data and examination of the test specimens. Other supporting work included a literature review of the development of transport seats from the 1950's to the present, an investigation of the elements affecting transport seats' performance in a crash environment, and recommended changes that would improve the seats' survival. Additionally, a study was performed of severe survivable transport accidents between 1970 and 1983 to determine the effect transport seat performance had on passenger survival, and to identify instances where an improved seat/restraint system might have been beneficial.
Download or read book Methods for Determining the Seat Reference Point SRP and the Buttock Reference Point BRP for Seats in Transport Aircraft Civil Rotorcraft and General Aviation Aircraft written by Aircraft SEAT Committee and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Aerospace Recommended Practice (ARP) defines acceptable methods for determining the seat reference point (SRP), and the documentation requirements for that determination, for passenger and crew seats in Transport Aircraft, Civil Rotorcraft, and General Aviation Aircraft. The methods for determining the Seat Reference Point (SRP) for aircraft seats were originally contained in AS8049 and were recently moved to ARP5526. The SRP is a feature of the seat that is used in multiple SAE aircraft seat documents, as well as regulatory standards and guidance. These methods should be located in a separate document, where they can be referenced by other documents, maintained independent of changes to other documents and eventually stabilized. The method used for determining the Buttock Reference Point (BRP) for aircraft seats has not been clearly defined, is a feature that is used in multiple documents, and should also be located in this document.
Download or read book Federal Register written by and published by . This book was released on 1983-08-15 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Virtual Nonlinear Multibody Systems written by Werner Schiehlen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains an edited versIOn of lectures presented at the NATO ADVANCED STUDY INSTITUTE on VIRTUAL NONLINEAR MUL TIBODY SYSTEMS which was held in Prague, Czech Republic, from 23 June to 3 July 2002. It was organized by the Department of Mechanics, Faculty of Mechanical Engineering, Czech Technical University in Prague, in cooperation with the Institute B of Mechanics, University of Stuttgart, Germany. The ADVANCED STUDY INSTITUTE addressed the state of the art in multibody dynamics placing special emphasis on nonlinear systems, virtual reality, and control design as required in mechatronics and its corresponding applications. Eighty-six participants from twenty-two countries representing academia, industry, government and research institutions attended the meeting. The high qualification of the participants contributed greatly to the success of the ADVANCED STUDY INSTITUTE in that it promoted the exchange of experience between leading scientists and young scholars, and encouraged discussions to generate new ideas and to define directions of research and future developments. The full program of the ADVANCED STUDY INSTITUTE included also contributed presentations made by participants where different topics were explored, among them: Such topics include: nonholonomic systems; flexible multibody systems; contact, impact and collision; numerical methods of differential-algebraical equations; simulation approaches; virtual modelling; mechatronic design; control; biomechanics; space structures and vehicle dynamics. These presentations have been reviewed and a selection will be published in this volume, and in special issues of the journals Multibody System Dynamics and Mechanics of Structures and Machines.
Download or read book 30th Aerospace Mechanisms Symposium written by and published by . This book was released on 1996 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP written by and published by . This book was released on 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Accidental Injury written by Narayan Yoganandan and published by Springer. This book was released on 2014-11-17 with total page 855 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a state-of-the-art look at the applied biomechanics of accidental injury and prevention. The editors, Drs. Narayan Yoganandan, Alan M. Nahum and John W. Melvin are recognized international leaders and researchers in injury biomechanics, prevention and trauma medicine. They have assembled renowned researchers as authors for 29 chapters to cover individual aspects of human injury assessment and prevention. This third edition is thoroughly revised and expanded with new chapters in different fields. Topics covered address automotive, aviation, military and other environments. Field data collection; injury coding/scaling; injury epidemiology; mechanisms of injury; human tolerance to injury; simulations using experimental, complex computational models (finite element modeling) and statistical processes; anthropomorphic test device design, development and validation for crashworthiness applications in topics cited above; and current regulations are covered. Risk functions and injury criteria for various body regions are included. Adult and pediatric populations are addressed. The exhaustive list of references in many areas along with the latest developments is valuable to all those involved or intend to pursue this important topic on human injury biomechanics and prevention. The expanded edition will interest a variety of scholars and professionals including physicians, biomedical researchers in many disciplines, basic scientists, attorneys and jurists involved in accidental injury cases and governmental bodies. It is hoped that this book will foster multidisciplinary collaborations by medical and engineering researchers and academicians and practicing physicians for injury assessment and prevention and stimulate more applied research, education and training in the field of accidental-injury causation and prevention.
Download or read book Mitigation written by Jeffrey A Pike and published by SAE International. This book was released on 2011-09-08 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nearly 50,000 Americans die from brain injuries annually, with approximately half of all Traumatic Brain Injuries (TBI) being transportation-related. TBI is a critical and ever-evolving safety topic, with equally important components of injury prevention, consequences, and treatment. This book is part of a 3-volume set which presents a comprehensive look at recent head injury research and applies protective strategies to various injury scenarios, such as passenger vehicles, sports, and blast injuries, or to a particular demographic group, such as children or seniors. This volume features 14 technical papers. Editor Jeffrey A. Pike has selected the most relevant technical papers spanning the early 1990s through the beginning of 2011, including several older papers which provide an essential historical perspective. Each volume in the series also includes a table of references arranged by topic and a new chapter tying together anatomy, injury, and injury mechanism topics. Buy the Set and Save! Head Injury Biomechanics The three-volume set consists of these individual volumes: Head Injury Biomechanics, Volume 1--The Skull Head Injury Biomechanics, Volume 2--The Brain Head Injury Biomechanics, Volume 3--Mitigation
Download or read book Crashworthiness Analysis of Commuter Aircraft Seats written by D. H. Laananen and published by . This book was released on 1993 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crashworthiness of Transportation Systems Structural Impact and Occupant Protection written by Jorge A.C. Ambrósio and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: A systematic treatment of current crashworthiness practice in the automotive, railroad and aircraft industries. Structural, exterior and interior design, occupant biomechanics, seat and restraint systems are dealt with, taking account of statistical data, current regulations and state-of-the-art design tool capabilities. Occupant kinematics and biomechanics are reviewed, leading to a basic understanding of human tolerance to impact and of the use of anthropometric test dummies and mathematical modelling techniques. Different types of restraining systems are described in terms of impact biomechanics. The material and structural behaviour of vehicle components is discussed in relation to crash testing. A variety of commonly used techniques for simulating occupants and structures are presented, in particular the use of multibody dynamics, finite element methods and simplified macro-elements, in the context of design tools of increasing complexity, which can be used to model both vehicles and occupants. Audience: An excellent reference for researchers, engineers, students and all other professionals involved in crashworthiness work.
Download or read book Conference Proceedings written by and published by . This book was released on 1996 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
