SAE J 1598-2016 Laboratory Testing of Vehicle and Industrial Heat Exchangers for Durability Under Vibration-Induced Loading.pdf

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4、70 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J1598_201606 SURFACE VEHICLE RECOMMENDED PRACTICE J1598 JUN2016 Issued 1988-07 R

5、evised 2016-06Superseding J1598 MAY2009 Laboratory Testing of Vehicle and Industrial Heat Exchangers for Durability Under Vibration-Induced Loading RATIONALE Corrections were made to grammar and punctuation. A suggestion was added to 4.1 regarding verification of test equipment durability in regards

6、 to the test plan. A comment was added to 5.3 to specify simultaneous 3-axis testing, if possible. References to cancelled document SAE J2676 were removed and replaced with SAE J1726, Charge Air Cooler Internal Cleanliness, Leakage, and Nomenclature. 1. SCOPE This SAE Recommended Practice is applica

7、ble to all liquid-to-gas, liquid-to-liquid, gas-to-gas, and gas-to-liquid heat exchangers used in vehicle and industrial cooling systems. This document outlines the test to determine durability characteristics of the heat exchanger from vibration-induced loading. 1.1 Purpose This document provides a

8、 test guideline for determining the durability of a heat exchanger under specified vibration loading. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications s

9、hall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J1542 Laboratory Testing of Vehicle and Industrial Heat Exchangers for Thermal Cycle Durab

10、ility SAE J1597 Laboratory Testing of Vehicle and Industrial Heat Exchangers for Pressure-Cycle Durability SAE J1726 Charge Air Cooler Internal Cleanliness, Leakage, and Nomenclature 3. OBJECTIVE To verify compliance with established criteria that ensures durability in a specific application. This d

11、ocument describes a system to induce stresses in a heat exchanger resulting from vibration loading. The process is accomplished by vibrating the unit at specified frequencies and amplitudes, or at specified frequencies and acceleration. SAE INTERNATIONAL J1598 JUN2016 Page 2 of 4 4. FACILITY REQUIRE

12、MENT The facility should provide the following as required: 4.1 Vibration equipment with controls on frequency, amplitude, and acceleration (for 50 Hz and below, electrohydraulic is suggested, higher frequencies may require electrodynamic). It should be verified that the test equipment will meet the

13、 parameters of the agreed upon test plan. Examples of test equipment include Triaxial Shaker, Sequential Axis Random Shaker, etc. 4.2 Test Fixture 4.2.1 Actual Installation 4.2.2 If actual installation is not available, a fixture should support the heat exchanger with orientation as in service or as

14、 specified. The fixture must be rigid so as not to induce any additional dynamic inputs. 4.3 Means of checking heat exchanger integrity. 4.4 Equipment to monitor motion of unit during test. 4.5 Source for pressurizing and heating test unit as required. 4.6 Additional equipment may include but not be

15、 limited to the following: a. Accelerometers b. Automatic data logging equipment c. Automatic emergency shutdown d. Cycle counters e. Digital signal analyzer f. Function generator (sine wave, random noise, square wave, ramp function, etc.) g. Load transducers h. Pressure gauges i. Pressure regulator

16、s j. Data recording equipment k. Safety features as specified by regulatory codes and common practices l. Strain measurement equipment m. Temperature monitoring and control equipment 5. TESTING 5.1 Test heat exchanger for integrity. 5.2 Install test unit on vibration test fixture as in 4.2.2, fill w

17、ith specified test fluid, and include all mounting hardware: isolators, tie rods, mounting brackets, etc. All heat exchanger mounted masses will affect the response characteristics of the test unit and should be attached. Examples of mounted masses for a radiator are: charge air cooler, condensers,

18、oil cooler, air dryers, shrouds, shutter, etc. Plumbing and termination points should also be considered. All fan systems shall have the vehicle level control strategy operational. SAE INTERNATIONAL J1598 JUN2016 Page 3 of 4 5.3 Set up control system to obtain the specified vibration cycle under one

19、 of the following modes: 5.3.1 Road or duty cycle (simulation or replication). It may be desirable to filter road cycle data to remove non damaging portions of the drive event (smooth road for example) to reduce overall test time. From a test time perspective, it is ideal to utilize test equipment c

20、apable of providing vibration input in the X, Y and Z axes simultaneously (triaxial). If that is not possible, then each axis should be run independently (sequential axis) for the prescribed test time. 5.3.2 Failure mode simulation. 5.3.3 Sine sweep at specified acceleration or amplitude. 5.3.4 Reso

21、nant frequency at specified energy input. 5.3.5 Random noise at specified acceleration levels. 5.3.6 Per established specification. 5.4 Pressurize and heat the test unit as required. CAUTION: Pressures exceeding specified maximum value can cause significant structural damage which will invalidate th

22、e test results. The system shall be capable of maintaining this pressure within 5% absolute pressure unless otherwise specified and should be measured within or as near the test units as possible. 5.5 Run test to specified duration or component failure. 5.6 Remove and test heat exchanger for leaks a

23、nd structural damage. Methods described in SAE J1726, Charge Air Cooler Cleanliness, Leakage and Nomenclature, should be used for air-to-air charge air coolers to determine if post-test leakage is acceptable. Qualitative inspection methods can also be used to evaluate post-test condition of heat exc

24、hanger. 6. TEST DOCUMENTATION 6.1 During and after test, document leakage rate(s), location(s), and structural failures for comparison to acceptance criteria. Methods described in SAE J1726, Charge Air Cooler Internal Cleanliness, Leakage, and Nomenclature, should be used for air-to-air charge coole

25、rs to determine if post-test leakage is acceptable. 6.2 Document the following: a. Condition of unit prior to test (new or previous history) b. Unit Orientation (Reference to 5.2) c. Test Mode (Reference to 5.3) d. Pressure and Temperature (Reference to 5.4) e. Duration of Test (Reference to 5.5) f.

26、 Location of leaks and structural damage (Reference to 5.6) 6.3 Testing should be adequately documented to allow test reproduction. Documentation to include a test log of the complete test, recording any changes in the heat exchanger and fixture. Test log to include cycles or hours, time of day for

27、all test starts and stops with reasons for stops. 6.4 This document is valid for durability comparison of vibration induced loadings. Correlation to field results must be developed on an individual basis. Other tests affecting heat exchanger durability are SAE J1542 (Thermal Cycle) and SAE J1597 (Pr

28、essure Cycle). These tests can be run in combination as well as independently. NOTE: Combination testing may make it difficult to determine cause of failure. SAE INTERNATIONAL J1598 JUN2016 Page 4 of 4 7. NOTES 7.1 Revision Indicator A change bar (I) located in the left margin is for the convenience

29、 of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE COOLING SYSTEMS STANDARDS COMMITTEE