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★ MIL-S-901 - military of the united states standards ..



MIL-S-901
                                     

★ MIL-S-901

Military Specification MIL-S-901D is a military specification for High Impact mechanical shock which applies to equipment mounted on ships. Two levels apply. Grade A items are items which are essential to the safety and continued combat capability of the ship. Grade B items are items whose operation is not essential to the safety and combat capability of the ship but which could become a hazard to personnel, to Grade A items, or to the ship as a whole as a result of exposure to shock. "Grade C", signifying that no shock qualification is required, is also sometimes referenced in acquisition documents even though the term has no official standing in the specification document. Qualification testing is performed on a specified machine or on a barge floating in a pond where an explosive charge is detonated at various distances and depths in the pond to impart shock to the barges. See Barge Test.

Publication Date: March 17, 1989

In mil-S-901D specification covers the requirements for impact testing on Board the vessel, machinery, equipment, systems and structures, excluding submarine penetration of the hull. The purpose of these requirements is to verify the ability of shipboard installations to withstand shock loadings which may be incurred during wartime service due to the effects of nuclear or conventional weapons.

Tests are classified according to one of the following categories of tests, as indicated.

  • Medium weight. The medium weight test is a test performed on the medium weight shock machine. Weight of the test item including fixture to attach it to the test machine shall be less than 7.400 pounds.
  • Lightweight. The lightweight test is a test performed on the lightweight shock machine. Weight of the test item including fixture to attach it to the test machine shall be less than 550 pounds.
  • Heavyweight. The heavyweight test is a test performed on a standard or large floating shock platform.

Items must be checked, must be classified under one of the following names mentioned:

  • Grade A. Grade A items are items which are essential to the safety and continued combat capability of the ship.
  • Grade B. Grade B items are items whose operation is not essential to the safety and combat capability of the ship but which could become a hazard to personnel, to grade A items, or to the ship as a whole as a result of exposure to shock.

Items must be checked, must be classified under one of the following classes as indicated:

  • Class I. Class I equipment is defined as that which is required to meet these shock requirements without the use of resilient mountings installed between the equipment and the ship structure or foundation.
  • Class II. Class II equipment is defined as that which is required to meet these shock requirements with the use of resilient mountings installed between the equipment and the ship structure or shipboard foundation.
  • Class III. Unless otherwise specified, class III equipment is defined as that which has shipboard application both with and without the use of resilient mountings and is therefore required to meet both class I and class II requirements.

Tests should be classified in accordance with one of the following types, as specified:

  • Type A. A type A test is a test of a principal unit. This is the preferred test. Principal units are items which are directly supported by the ship structure or by a foundation which is directly attached to the ship structure, and items mounted in piping systems, ducting systems, and similar systems which are supported by ship structure. The shock response of a principal unit is primarily a function of the rigidity and mass of the item and the shipboard mounting structure, the shipboard mounting location, and the configuration of the item. Such items typically include diesel-generator sets, air conditioning plants, switchboards, radio transmitters, steam generators, missile launchers, and valves if installed in piping which is supported by ship structure.
  • Type C. A type C test is a test of a subassembly. Subassemblies are items which are a part of a principal unit or a subsidiary component. The shock response of the subassembly is significantly affected by that of the associated principal unit or subsidiary component, but the shock response of the principal unit or subsidiary component is not significantly affected by the subassembly. Examples are thermometers, gauges, meters, relays, and resistors. The distinction between subassembly and assembly or part as used herein may be different than that used in various equipment specifications or other acquisition documents.
  • Type B. A type B test is a test of a subsidiary component. Subsidiary components are items which are the major parts of a principal unit. The shock response of the subsidiary component is significantly affected by that of the associated principal unit and all associated subsidiary components. The shock responses of the associated principal unit and all associated subsidiary components are significantly affected by that of the subsidiary component. Examples are the diesel engine of a diesel-generator set, the electric motor of an air conditioning unit, or the power supply section of a radio transmitter.
                                     

1. Barge Test. (Тест Баржа)

Test on a barge or heavy test requires the test object for installation on floating barges. For standard floating platform, 60 lb HBX-1 explosive charge placed 24 feet under water at various distances from the barge and blew up. There are four shots. The first is on the longitudinal axis, 40 meters from the barge. Frames 2, 3 and 4 are placed perpendicular to the ship at distances of 30, 25 and 20 feet. Distance refers to the proximal side of a floating platform.

On a large floating platform, 300 pounds of HBX-1 at a depth of 20 feet under water and the distances 110, 80, 65 and 50 metres from the barge with the first shot and in the longitudinal and in the other three shots abeam of the ship.

A hammer can be used for preliminary evaluation of the product and identify weaknesses, but ultimately, the points must be certified in accordance with MIL-s-901D will be checked on the barge.

                                     

2. Applicability to products. (Применимость к продуктам)

Suppliers can and some do take significant latitude with how they test their products, and how they report the test results. As a consequence, the requirements of "compliance with MIL-s-901" can be misleading. Users who need reliable products should verify the test methods I, the observance of which is approved, B), which restricts the parameter actually has been tested, and III whether the tests were carried out to internal or external independent testing.

                                     

3. Products: electric motors. (Продукция: электродвигатели)

Military standard MIL-DTL-17060GSH confirms two types of electric motors, an a / C service and maintenance

  • Service C motors. Service C motors shall be marine type commercial motors. Service C motors shall meet the requirements of MIL-S-901 for Grade B shock.
  • Service A motors. Service A for driven auxiliaries including propulsion, which are essential to the military effectiveness of a ship, should be heavy-duty, high impact, shock-resistant motors. Service A motors shall meet MIL-E-917 and the requirements of MIL-S-901 for Grade A. Nonmagnetic electric motors for mine countermeasures vessel and electric motors for submarine service shall always meet Service A.

High-impact shock test for motors are defined in weight categories. Tests for light engines shall be delivered nine blows when the engine is running without load at rated speed. Nine shocks transmitted from the motor to the Parking lot. The tests specified in MIL-s-901 medium-weight engines should be conducted when the engine is running without load at rated speed or with the engine stationary. Motors can be provided for each of a series of three punches

Motors weighing 250 pounds or less should be tested on the lightweight shock testing machine. Motors weighing more than 250 pounds to 6.000 pounds shall be tested for average weight impact testing machine. Motors weighing more than 6.000 pounds shall be tested on a floating shock test platform or barge test.



                                     
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Encyclopedic dictionary

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Shock Isolation Systems Milcots.

Опубликовано: 24 окт. 2018 г. Naval Enclosure Subsystems 901D. Grade A, Type 1 Hi Shock requirements per MIL S 901. The valves described are a sampling of the designs available meeting Navy specifications. Quality Assurance ESL Labs ESL Technology Inc. FER7KVA HW 120V 10A CHGR EXT BAT DVR MIL S 901. FER7KDDFAAAFL. Overview Specifications Resources Support. Back to search. Serial Number. Underwater Shock Test MIL S 901D N66604 19 Q 2485 GovTribe. Military Specification MIL S 901D is a military specification for High Impact mechanical shock which applies to equipment mounted on ships.





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Specialty Testing Norman Filter Company.

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NSRP SHOCK FAMILARIZATION.

For shipboard equipment to qualify as shock hardened, it must pass a shock test in accordance with the U.S. military shock test specification, MIL S 901. Shock Extension NNS Suppliers. The MIL S 901D medium weight shock machine consists of a. 3.000 pound pendulum hammer, a 4.400 pound anvil table that the test equipment is mounted to.


Dynamics NU LABS.

The authors have observed cases when equipment passing. MIL S 901 shock qualification testing using one method e.g., the medium weight failed when tested. Transformer Rectifier Units Abbott Technologies. MIL DTL 901E is a detail specification defining the high impact shock testing requirements for machinery, equipment, systems, and structures aboard surface. MIL STD 810, MIL STD 461, MIL STD 901 & more. Advanced composite propeller material. Tested and meets MIL S 901 shock test​. Ambient temperature range: 54C to 85C. Steady state voltage range: 22. ASTM F998 Close Coupled Pump M Series Carver Pump. MIL S 901 MIL STD 167 1 MIL STD 883 MIL DTL 83526 MIL E 5400 MIL ​PRF.


MIL S 901D Barge Testing YouTube.

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Comparison of Shock Test Methods of MIL‐S‐901 Derived from.

Military Specification MIL S 901D is a military specification for High Impact mechanical shock which applies to equipment mounted on ships. Two levels apply. ShockGuide060901.pdf. Lightweight: MIL S 901D to 550 lbs. Purpose of test is to verify the ability of shipboard installations to withstand shock loadings which may be incurred during​. Jay El P N 10820 Ducommun. HI TEST is NAVSEA approved for MIL S 901 hi impact shock testing. We are the only facility that offers 24 7 testing without local restrictions. Our collection of. MIL S 901: Everything You Need to Know Trenton Systems. MIL S 901 MIL STD 167 1 MIL STD 883 MIL DTL 83526 MIL E 5400 MIL ​PRF Следующая Войти Настройки. MIL S 901 Shock Testing of NEW Bi Directional Fan Coil LinkedIn. We specialize in meeting military specifications for shipboard equipment such as MIL STD 167 Mechanical Vibration of Shipboard Equipment and MIL S 901D.





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MIL DTL 901E, the revision to MIL S 901D of 1989 has been approved and released as of 20 June 2017. For most Navy shipboard shock practitioners, the most. Hammer blow test from MIL S 901 Mechanical Acoustics Vibration. Those isolation frames are engineered to allow large displays to handle severe shock and vibration requirements, like the MIL S 901D grade A. The shock. Getac X500 MIL S 901D NAVSEA Qualified Shipboard Mount. References Include: Mil S 901D, Shock Tests H I High Impact Shipboard Machinery, Equipment and Systems, Requirements for. NAVSEA 0908 LP 000 ​3010,. Military Testing to MIL STD 810, MIL STD 883, MIL STD MET Labs. Occasionally I receive questions regarding the equivalent SRS for a MIL S 901 shock test. Alas, I have no experience with MIL S 901 testing.


COMPARISON OF SHOCK TEST METHODS OF MIL S 901.

General Micro Systems SD19 Smart Display Passes MIL S 901D Shock Test. 19 ​inch RuggedView™ smart LCD display remains intact and. Damped 2DOF Model of MIL S 901D Medium Sound & Vibration. Specified by MIL S 901D. Comparisons between predicted and measured response are provided for a single strut as well as the fully shock isolated platform. MIL DTL 901E vs MIL S 901D Crystal Group Crystal Rugged. This is an important consideration when budgeting a new requirement that calls for qualification to MIL S 901 and MIL STD 167 1 shock and vibration.


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For qualification under MIL standards including: MIL STD 461, MIL STD 704, MIL STD 1275, MIL STD 810, MIL S 901, RTCA DO 160 and many others. Finite Element Analysis MRD Engineering. Опубликовано: 15 июн. 2015 г.





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