NDLI: Impact Tests in Pure and Aerated Water

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Niels, A. Lange Rung, Thomas
Copyright Year	2011
Abstract	Impact loads due to slamming or ditching are an important issue in marine and aircraft engineering. Accordingly, many experimental, theoretical and numerical investigations have been performed. The paper reports the build-up of a test rig, which was designed to study vertical guided motion impact tests, and the results of an experimental study on impact loads into pure and aerated water. Attention is given to the loads experienced by a rigid circular-cylinder section (diameter = 0.2 m, length = 0.5 m) during guided, constant-speed impact. The investigations involve a variety of entry speeds up to 3m/s and gas-content levels. The obtained data offers a basis for an analysis of the sensitivity of the impact loads on the gas content. Fair compliance with literature reported experimental and theoretical results — using e.g. von Ka´rma´n or Wagner theories — has been obtained for pure water impact loads. For impact tests in aerated water, a significant reduction of the measured pressure peaks becomes apparent. Finally, the paper illustrates the feed back of the experimental results into an impact-load model, taking the fluid compressibility into account.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
Starting Page	559
Ending Page	567
Page Count	9
File Format	PDF
ISBN	9780791844380
DOI	10.1115/OMAE2011-49725
Volume Number	Volume 6: Ocean Engineering
Conference Proceedings	ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
Language	English
Publisher Date	2011-06-19
Publisher Place	Rotterdam, The Netherlands
Access Restriction	Subscribed
Subject Keyword	Water Fluids Compressibility Impact testing Aircraft Pressure Stress Circular cylinders
Content Type	Text
Resource Type	Article

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