PDF Price
$99.00
ADD TO CART
The Acoustical Society of America (ASA)’s mechanical vibration standards include the S2 series, which cover specifications to reduce the effects of rhythmic vibration on sensitive equipment and how to measure the intensity of such vibration. A popular standard series listed is the S2.80 subseries, which cover measurement of machine vibration in turbines as well as tolerances and ways to mitigate vibration to ensure longevity of such equipment.
This Standard contains guidelines for limiting the machinery and operating equipment vibration on board ships for the purposes of habitability and mechanical suitability. The mechanical suitability guidelines result in a suitable environment for installed equipment and precludes many major vibration problems, such as imbalance, misalignment, or other damage to the machinery and operating equipment. To obtain data to compare with the guidelines, this Standard also specifies data acquisition and processing procedures.
This standard provides consensus quantitative definitions of explosion characteristics for a single point explosion in air, along with methodologies for scaling these characteristics for a wide range of yield and ambient air conditions.
This Standard applies to the preparation of a standard material for calibration of instruments for measuring the dynamic mechanical properties of viscoelastic materials.
This standard is designed to acquaint the user with the general principles of calibration of shock and vibration pickups and to describe concisely several standard methods which have proven to give reliable and reproducible results.
This Standard defines a method for measuring the dynamic mechanical properties of viscoelastic materials using longitudinal resonance in a bar-shaped test sample. The dynamic mechanical properties are expressed in terms of the frequency dependence of Young’s modulus and loss factor at a given reference temperature. The Standard provides information for constructing such equipment and analyzing the results obtained.
This Standard defines a method for measuring the dynamic mechanical properties of viscoelastic materials using a cantilever beam technique. The dynamic mechanical properties are expressed in terms of the frequency dependence of Young’s modulus and loss factor at a given reference temperature. The Standard provides information for constructing such equipment and analyzing the results obtained.
This Standard specifies the procedure for generating a graphical presentation of the frequency and temperature dependence of the complex modulus of viscoelastic materials.
Establishes uniform procedures for acquiring, processing, presenting, and evaluating shipboard vibration data for sea-going merchant ships of all lengths, and, where applicable, for inland ships and tugboats. It is applicable to both turbine and diesel-driven ships, with single or multiple shafts, but not to outboard-engine driven boats nor to air-driven vessels such as air-cushion vehicles.
This national standard defines vibration test requirements for shipboard equipment and machinery components. The tests are intended to locate resonances of the equipment and impose endurance tests at these frequencies, if any. The frequency range of the tests is 4 Hz to 50 Hz (100 Hz for reciprocating machinery-mounted equipment).
This standard establishes uniform procedures for determining the acceptance of new marine propulsion machinery with respect to vibration of seagoing and inland ships of all lengths, excluding icebreakers
This standard is the first part of a series of five standards covering the experimental determination of mechanical mobility of structures by a variety of methods appropriate for different test situations. The present Part I of this series covers basic concepts and definitions and serves as a guide for the selection, calibration, and evaluation of the transducers and instruments used in mobility measurements. The material in Part I is common to most mobility measurement tasks. This document supersedes ANSI Standard S2.6-1963(R1976). The future parts of this series will cover specific mobility measurement situations such as the use of steady-state rectilinear excitation, steady-state torsionat excitation, measurements of the entire mobility matrix using steady-state excitation, and mobility measurements using impact excitation, as well as other forcing functions which use Fourier transform techniques for data reduction. The present document (Part I of this series) has four appendices containing selected references to the literature, a discussion of the relationships between mechanical mobility and impedance, a discussion of mobility as a frequency response function, and conversion factors from SI to conventional English units as applicable to mobility and related ratios.
This standard is the second part of a set of five standards covering the experimental determination of mechanical mobility of structures by a variety of methods appropriate for different test situations. Part I of the set (ANSI S2.31-1979) covers basic concepts and definitions as well as instruments used in mobility measurements. The material in Part I is common to most mobility measurement tasks. The present Part II of the set describes measurements in situations where single-point translational excitation with an attached vibration exciter is appropriate.
This guide delineates the methods and procedures which may be used to determine the structural mobility properties, translational and rotational, of a system of points on a structure. This guide is to be used for guidance only, since the state of the art is still in flux.
The purpose of this standard is to provide a unified terminology and format for the presentation of performance and other characteristics of auxiliary analog equipment for shock and vibration measurement.
This standard specifies rules for the presentation of important characteristics for electro-mechanical shock and vibration transducers (seismic pick-ups), the electrical outputs of which are known functions of the uniaxial, multiaxial, or angular accelerations, velocities, or displacements of objects the motions of which are being measured.
This American National Standard is to be used for testing equipment that will be subjected to shock. It defines test requirements and severity thresholds for a large range of shock environments, including but not limited to shipping, transport, and rugged operational environments. This standard will allow vendors to better market and users to more easily identify equipment that will operate or simply survive in rugged shock environments.
This nationally adopted international standard establishes general conditions and procedures for the measurement and evaluation of vibration using measurements made on rotating, non-rotating, and non-reciprocating parts of complete machines. It is applicable to measurements of both absolute and relative radial shaft vibration with regard to the monitoring of radial clearances, but excludes axial shaft vibration. The general evaluation criteria, which are presented in terms of both vibration magnitude and change of vibration, relate to both operational monitoring and acceptance testing. They have been provided primarily with regard to securing reliable, safe, long-term operation of the machine while minimizing adverse effects on associated equipment. Guidelines are also presented for setting operational limits.
This nationally adopted international standard is applicable to land-based gas turbines, steam turbines and generators (whether coupled with gas and/or steam turbines) with power outputs greater than 40 MW, fluid-film bearings and rated speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min or 3 600 r/min. The criteria provided in this document can be applied to the vibration of the gas turbine, steam turbine and generator (including synchronizing clutches). This document establishes provisions for evaluating the severity of the following in-situ, broad-band vibration: a) structural vibration at all main bearing housings or pedestals measured radial (i.e. transverse) to the shaft axis; b) structural vibration at thrust bearing housings measured in the axial direction; c) vibration of rotating shafts radial (i.e. transverse) to the shaft axis at, or close to, the main bearings.
This nationally adopted international standard establishes procedures and unbalance tolerances for balancing rotors with rigid behaviour. It specifies a) the magnitude of the permissible residual unbalance, b) the necessary number of correction planes, c) the allocation of the permissible residual unbalance to the tolerance planes, and d) how to account for errors in the balancing process. This document does not cover the balancing of rotors with flexible behaviour. Procedures and tolerances for rotors with flexible behaviour are dealt with in ANSI/ASA S2.81/Part 12/ISO 21940-12.
This nationally adopted international standard presents typical configurations of rotors with flexible behaviour in accordance with their characteristics and balancing requirements, describes balancing procedures, specifies methods of assessment of the final state of balance, and establishes guidelines for balance quality criteria. Can also serve as a basis for more involved investigations, e.g. when a more exact determination of the required balance quality is necessary. If due regard is paid to the specified methods of manufacture and balance tolerances, satisfactory running conditions can be expected. Is not intended to serve as an acceptance specification for any rotor, but rather to give indications of how to avoid gross deficiencies and unnecessarily restrictive requirements. Structural resonances and modifications thereof lie outside the scope of this document. The methods and criteria given are the result of experience with general industrial machinery. It is possible that they are not directly applicable to specialized equipment or to special circumstances. Therefore, in some cases, deviations from this document are possible.
This nationally adopted international standard specifies the requirements for identifying errors in the unbalance measuring process of a rotor; assessing the identified errors; taking the errors into account. Specifies balance acceptance criteria, in terms of residual unbalance, for both directly after balancing and for a subsequent check of the balance quality by the user. For the main typical errors, this document lists methods for their reduction in an informative annex.
This nationally adopted international standard defines terms on balancing. It complements ANSI/ASA S2.1/ISO 2041, which is a general vocabulary on mechanical vibration and shock.
Establishes the requirements to promote appropriate exchange of information regarding the application and selection of isolation for the reduction of vibrations generated by equipment and machines. Use of this standard can improve communication among engineers, manufacturers and end-users concerned with vibration isolation. (With erratum)
This standard presents the required nomenclature to improve communications among the many technological fields concerned with material damping that are used for resilient mountings so there will be a clear understanding by both the user and the manufacturer. Since the intention of this standard is to encourage better communication between the manufacturer and the user, the material set forth herein should be regarded as a nomenclature for specifying damping properties of the resilient materials. It is intended to outline, in standardized form, what information should be presented to enable the experienced designer to apply them for selecting the resilient material for machine mountings correctly. Also, the standard defines terminology in a further effort to ease the problem of communication between user and manufacturer.