The environmental tests is a branch of the reliability tests. The environmental tests has recently been important in the industry. High and low temperature tests has been performed in the basic tests of the environmental tests. So high and low temperature tests has been extensively increased in the industry. The MIL-STD-810G w/Change 1 is used as the basic standards to perform the environmental tests. In this paper, It is reviewed in the method for high and low temperature test of the MIL-STD-810G w/Change 1. The product has to operate in climates of the world in which is expected to be used. The climates of the world is different climatic conditions depending on the location. The product is produced, transported and stored in each different condition. So the product is exposed in a variety of conditions, such as high and low temperature. The purpose of the temperature tests obtains data to help evaluate effects of high(or low) temperature conditions on safety, integrity, and performance during storage, operation, and manipulation.

MIL-STD-810G w/Change 1의 고온 및 저온 시험 방법에 대한 고찰

Test Observations of the Characteristics of the Acoustic Field Generated by High Intensity Loudspeaker Testing

Spacecraft and its payload structures are subject to severe acoustic loading during launch and ascension through the atmosphere. These harsh acoustic environments can potentially damage mission critical components and jeopardize mission success. It is well-known that high-quality vibro-acoustic predictions are vital to achieve the optimal spacecraft and payload structure designs with reduced weight. It is also widely recognized that the well-established knowledge base of damping loss factor of the structure is one of the key elements to accurately characterize and predict the structural dynamic responses under acoustic excitations. This paper focuses on assessing the influences of damping loss factor to the correlation errors between the coupled finite element/boundary element method vibro-acoustic analysis predictions and acoustic reverberation chamber test data of the Surface Water and Ocean Topography Mission Payload. The current work also aims at addressing the identification of the major sources of discrepancies, and exploration of development on the improved modal damping distribution for vibro-acoustic analysis. 

Correlation Study of SWOT Payload Acoustic Prediction and Test

/pdf/acoustic-analysis-of-spacecraft-cavities-using-the-boundary-2kw4ykcwui.pdf

Acoustic Analysis of Spacecraft Cavities using the Boundary Element Method

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Acoustic Analysis of Spacecraft Cavities using the Boundary Element Method