1、 INCH-POUND MIL-STD-167-1A2 November 2005 SUPERSEDING MIL-STD-167-1(SHIPS)1 May 1974 DEPARTMENT OF DEFENSE TEST METHOD STANDARD MECHANICAL VIBRATIONS OF SHIPBOARD EQUIPMENT (TYPE I ENVIRONMENTAL AND TYPE II INTERNALLY EXCITED) AMSC 7651 AREA ENVR DISTRIBUTION STATEMENT A. Approved for public release
2、; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-167-1A FOREWORD 1. This standard is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agenci
3、es of the Department of Defense. 2. This standard establishes requirements and acceptance criteria for: a. Environmental vibration testing of shipboard equipment. b. Balancing shipboard rotating equipment subjected to internally induced vibration during operation. 3. Shipboard equipment that conform
4、s to the requirements of MIL-STD-167-1A is found to satisfactorily perform its functions aboard ship. Equipment for which compliance with MIL-STD-167-1A is not specified or is waived could experience failures induced by vibration in shipboard service. 4. MIL-STD-167-1A, environmental vibration testi
5、ng, and MIL-S-901D, equipment shock testing, provide complementary requirements for the survivability of shipboard equipment. 5. This specification was revised to address the following: a. Requirements for test instrumentation and testing machines. b. Guidance in the selection of response prominence
6、s for endurance testing. c. Revisions to requirements for applicable frequency ranges. d. Revisions to attachment methods for equipment. e. Updated for conformance with MIL-STD-962D, “Defense Standards Format and Content”. 6. Comments, suggestions, or questions on this document should be addressed t
7、o Commander, Naval Sea Systems Command, ATTN: SEA 05Q, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to commandstandardsnavsea.navy.mil, with the subject line “Document Comment”. Since contact information can change, you may want to verify the currency of this
8、address information using the ASSIST Online database at http:/assist.daps.dla.mil. i Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-167-1A CONTENTS PARAGRAPH PAGE1. SCOPE1 1.1 Scope .1 1.2 Applicability1 1.3 Classification .1 2. APPLICABLE D
9、OCUMENTS.1 2.1 General 1 2.2 Government documents.1 2.2.1 Specifications, standards, and handbooks.1 2.3 Order of precedence.1 3. DEFINITIONS.1 3.1 Acceptance authority .1 3.2 Amplitude, single.2 3.3 Amplitude, vibratory displacement2 3.4 Balancing.2 3.4.1 Balancing, multi-plane2 3.4.2 Balancing, si
10、ngle-plane (static).2 3.4.3 Balancing, two-plane (dynamic).2 3.5 Critical speed .2 3.6 Environmental vibration 2 3.7 Equipment2 3.8 Grade, balance quality .2 3.9 Internally excited vibration2 3.10 Isolation mount2 3.11 Mass unbalance2 3.12 Maximum design rpm2 3.13 Method of correction .2 3.14 Mode2
11、3.15 Plane, correction 2 3.16 Plane, measuring3 3.17 Residual unbalance3 3.18 Resonance3 3.19 Response prominence 3 3.20 Rotor, flexible3 3.21 Rotor, rigid 3 3.22 Simple harmonic motion3 3.23 Test fixture resonance3 3.24 Transmissibility .3 4. GENERAL REQUIREMENTS .3 4.1 Notification of tests .3 4.2
12、 Identification of component compliance .3 4.3 Disposition of tested equipment 3 5. DETAILED REQUIREMENTS.4 5.1 Type I environmental vibration 4 iiProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-167-1A PARAGRAPH PAGE5.1.1 Basis of acceptabili
13、ty4 5.1.2 Test procedures.4 5.1.2.1 Testing machine.4 5.1.2.2 Additional test instrumentation4 5.1.2.3 Methods of attachment 5 5.1.2.3.1 Shipboard equipment5 5.1.2.3.2 Shipboard portable and test equipment.5 5.1.2.3.3 Orientation for vibration test.5 5.1.2.3.4 Isolation mountings 5 5.1.2.3.5 Interna
14、l isolation or shock mountings.5 5.1.2.4 Vibration tests5 5.1.2.4.1 Equipment operation.6 5.1.2.4.2 Exploratory vibration test .6 5.1.2.4.3 Variable frequency test .6 5.1.2.4.4 Exception6 5.1.2.4.5 Alternative test amplitudes .6 5.1.2.4.6 Endurance test.6 5.1.2.4.7 Endurance test for mast mounted eq
15、uipment7 5.1.2.5 Test documentation7 5.1.2.5.1 Test plan .7 5.1.2.5.2 Test report.7 5.1.3 Exemption.7 5.1.4 Extension of previous testing8 5.1.4.1 Extension documentation.8 5.2 Type II internally excited vibration 8 5.2.1 Basis of acceptability8 5.2.2 Balance procedure for rigid rotors8 5.2.2.1 Bala
16、ncing methods for rigid rotors 8 5.2.2.2 Balance limits for rigid rotors9 5.2.3 Balance procedure for flexible rotors .9 5.2.3.1 Balance limits for flexible rotors .9 5.2.3.2 Vibration test procedure 9 5.2.3.2.1 Mounting 9 5.2.3.2.2 Measurements.9 5.2.3.2.3 Instruments .9 6. NOTES10 6.1 Intended use
17、.10 6.2 Acquisition requirements.10 6.3 Associated Data Item Descriptions (DIDs)11 6.4 Tailoring guidance for contractual application 11 6.5 Superseding data11 6.6 Subject term (key word) listing .11 6.7 Changes from previous issue .11 6.8 Guidance documents12 iiiProvided by IHSNot for ResaleNo repr
18、oduction or networking permitted without license from IHS-,-,-MIL-STD-167-1A TABLES PAGEI. Vibratory displacement of environmental vibration.6 II. Duration of endurance test in a given orthogonal direction at each test frequency.7 III. Vibratory displacement of environmental vibration for mast mount
19、ed equipment .7 IV. Types of balancing 8 FIGURES PAGE1. Type I environmental vibration limits (black bars represent a graphical presentation of table I expressed in displacement, velocity, and acceleration).13 2. Vibration acceptance criteria for Type II vibration .14 3. Minimum static deflection of
20、 mounting for Type II vibration test 15 Appendix A16 A.1 SCOPE16 A.1.1 Scope .16 A.2 PROCEDURE.16 A.2.1 Determining and displaying transmissibility .16 A.2.1.1 Transmissibility magnitudes .16 A.2.1.2 Transmissibility and frequency.16 A.2.2 Identifying response prominences .16 A.2.3 Selecting enduran
21、ce test frequencies .17 A.2.3.1 Non-response prominence frequencies where functional or structural integrity is affected .17 A.2.3.2 Frequencies where response prominences have been identified.17 A.2.4 Guidance for specifiers 18 ivProvided by IHSNot for ResaleNo reproduction or networking permitted
22、without license from IHS-,-,-MIL-STD-167-1A 1. SCOPE 1.1 Scope. This standard specifies procedures and establishes requirements for environmental and internally excited vibration testing of Naval shipboard equipment installed on ships with conventionally shafted propulsion (see 6.1.e and 6.1.f). 1.2
23、 Applicability. The test methods specified herein are applicable to shipboard equipment subjected to mechanical vibrations from the environment and from internal excitation caused by unbalanced rotating components of Naval shipboard equipment. For those mechanical vibrations associated with reciproc
24、ating machinery and lateral and longitudinal vibrations of propulsion system and shafting, see MIL-STD-167-2. 1.3 Classification. The following types of vibration are covered in this standard: Type I - Environmental vibration Type II - Internally excited vibration 2. APPLICABLE DOCUMENTS 2.1 General
25、. The documents listed in this section are specified in sections 3, 4, or 5 of this standard. This section does not include documents cited in other sections of this standard or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this
26、 list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this standard, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbo
27、oks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-M-17191 - Mounts, Resilient: Portsmouth Bonded Spool Type MIL-M-17508 - Mounts, Resilie
28、nt: Types 6E100, 6E150, 7E450, 6E900, 6E2000, 5E3500, 6E100BB, 6E150BB, 7E450BB, and 6E900BB MIL-M-19379 - Mounts, Resilient, Mare Island Types 11M15, 11M25, and 10M50 MIL-M-19863 - Mount, Resilient: Type 5B5, 000H MIL-M-21649 - Mount, Resilient, Type 5M10, 000-H MIL-M-24476 - Mounts, Resilient: Pip
29、e Support, Types 7M50, 6M150, 6M450, 6M900, and 5M3500 (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Order of p
30、recedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. DEFINITIONS 3.1 Accepta
31、nce authority. As used in this standard, the term “acceptance authority” means the government activity (or its designated representative) having approval authority to determine vendor compliance with the requirements of this standard. 1 Provided by IHSNot for ResaleNo reproduction or networking perm
32、itted without license from IHS-,-,-MIL-STD-167-1A 3.2 Amplitude, single. See amplitude, vibratory displacement. 3.3 Amplitude, vibratory displacement. Vibratory displacement amplitude is the maximum displacement of simple linear harmonic motion from the position of rest. This is also referred to as
33、single amplitude. It is expressed in inches, mils (0.001 inch), or mm (0.001 meter). 3.4 Balancing. Balancing is a procedure by which the radial mass distribution of a rotor is adjusted so that the mass centerline approaches the geometric centerline of the rotor, and, if necessary, adjusted in order
34、 to ensure that the vibration of the journals and/or forces on the bearings, at a frequency corresponding to operational speed, are within specified limits. 3.4.1 Balancing, multi-plane. Multi-plane balancing refers to any balancing procedure that requires unbalance correction in more than two axial
35、ly separated correction planes. 3.4.2 Balancing, single-plane (static). Single-plane (static) balancing is a procedure by which the mass distribution of a rigid rotor is adjusted in order to ensure that the residual static unbalance is within specified limits and which requires correction in only on
36、e plane. (Note: Single-plane balancing can be done on a pair of knife edges without rotation of the rotor but is now more usually done on centrifugal balancing machines.) 3.4.3 Balancing, two-plane (dynamic). Two-plane (dynamic) balancing is a procedure by which the mass distribution of a rigid roto
37、r is adjusted in order to ensure that the residual unbalance in two specified planes is within specified limits. 3.5 Critical speed. Critical speed is the speed of a rotating system that corresponds to a natural frequency of the system. 3.6 Environmental vibration. Environmental vibration is vibrato
38、ry force, which is imposed on equipment installed aboard ships, caused by the hydrodynamic forces on the propeller blades interacting with the hull and by other sources. 3.7 Equipment. Equipment is any machine, subsystem, or part thereof, which is intended to be installed aboard ship. 3.8 Grade, bal
39、ance quality. Balance quality grade, G, refers to the amount of permissible unbalance of a rotor. The balance quality grade is the product of the maximum permissible eccentricity (distance between the shaft axis and the rotor center of gravity (in mm) and the rotational velocity (radians/sec). The u
40、nits for balance quality grade, G, are mm/sec. By this definition, a particular grade rotor will be allowed a mass eccentricity (e=G/), which is inversely proportional to the operating speed. 3.9 Internally excited vibration. Internally excited vibration is vibration of machinery generated by mass u
41、nbalance of a rotor. 3.10 Isolation mount. An isolation mount is a device used to attenuate the force transmitted from the equipment to its foundation. 3.11 Mass unbalance. Mass unbalance occurs when the mass centerline does not coincide with the geometric centerline of a rotor. 3.12 Maximum design
42、rpm. Maximum design rpm is the highest shaft rpm for which the ship is designed. 3.13 Method of correction. A method of correction is a procedure whereby the mass distribution of a rotor is adjusted to reduce unbalance, or vibration due to unbalance, to an acceptable value. Corrections are usually m
43、ade by adding material to, or removing it from, the rotor. 3.14 Mode. Mode is the manner or pattern of vibration at a natural frequency and is described by its natural frequency and relative amplitude curve. 3.15 Plane, correction. A correction plane is a plane transverse to the shaft axis of a roto
44、r in which correction for unbalance is made. 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-167-1A 3.16 Plane, measuring. A measuring plane is a plane transverse to the shaft axis in which the amount and angle of unbalance is determined. 3.
45、17 Residual unbalance. Residual unbalance is unbalance of any kind that remains after balancing. 3.18 Resonance. Resonance is the magnification of structural response, which occurs when a linear lightly damped system is driven with a sinusoidal input at its natural frequency. Resonances are the caus
46、e of many, but not all, response prominences. 3.19 Response prominence. Response prominence is a general term denoting a resonance or other distinct maximum, regardless of magnitude, in a transmissibility function, including local maxima which may exist at the frequency endpoints of the transmissibi
47、lity function. Typically, a response prominence is identified by the frequency of its maximum response, which is the response prominence frequency. A response prominence of a system in forced oscillation exists when any change, for both plus and minus increments however small, in the frequency of ex
48、citation results in a decrease of the system response at the observing sensor registering the maximum. A response prominence may occur in an internal part of the equipment, with little or no outward manifestation at the vibration measurement point, and in some cases, the response may be detected by
49、observing some other type of output function of the equipment, such as voltage, current, or any other measurable physical parameter. Instruction on how to identify response prominences is provided in Appendix A. 3.20 Rotor, flexible. A flexible rotor is one that does not meet the criteria for a rigid rotor. The unbalance of a flexible rotor cha
