No description available.

No description available.

Thesis (M.S.)--University of Michigan, 1970.

No description available.

Previous tests of an explosion driven hydrodynamic shock tube revealed peak pressure data significantly lower than values predicted from the semiempirical scaling laws. It was hypothesized that part of the deviation was due to error in determining shock wave parameters and part might be due to measurement error caused by mechanical vibration of the tube. This investigation was conducted in two parts. In the first part, shock wave parameters were determined using a digital computer and curve fitting techniques to analyze digitized shock wave data. The second part involved determining the frequency components of the shock wave data noise content and comparing this to the dynamic characteristics of the tube which were investigated through an impulse testing technique. From these efforts higher values for the peak pressure were verified but no evidence was found that vibration of the tube caused significant degradation of shock wave test data.

In order to better simulate an explosive underwater environment, a new design of the existing explosion driven hydrodynamic conical shock tube has been proposed. This new concept calls for the removal of part of the old tube to accommodate a distributed breach plug. The distributed breach should enhance shock wave characteristics by minimizing the energy losses associated with plastic deformations which occur at detonation. This report makes use of a finite element program, SAP IV, to investigate the modal characteristics of the new distributed breach design. A dynamic response history analysis has also been performed in order to predict the response of the structure to loads characteristic of an ideal shock wave as it propagates along the tube axis. From these efforts some insight has been gained into the structural feasibility of the new design

An explosive driven, water filled, conical shock tube was designed and evaluated regarding its ability to amplify a charge weight and to produce hydrodynamic spherical shock waves. The results show that the shock waves in the tube are essentially spherical in nature--with an initial exponential shape, peak pressure attenuation as (1/R)1.13 and the time constant spreading roughly as (R).22. The charge weight was amplified by a factor of 3600 compared to a theoretical amplification of 7770. An estimate of the energy absorbed by the breach plug (which houses the charge) during an explosion was performed. The peak pressure data taken from the detonation of number 8 strength blasting caps were seen to satisfy the semiempirical scaling law. However, with the addition of plastic explosive to the blasting cap, peak pressure lower than that predicted by the scaling law was observed. At this time it is felt that a decreasing amplification factor with charge weight is the cause for the lower than predicted peak pressure. More data are needed to verify this hypothesis.

Thesis (M. Eng. Sc.)--University of Queensland, 2001. / Includes bibliographical references.

No description available.

Thesis (M.S.)--University of Wisconsin--Madison, 1966. / eContent provider-neutral record in process. Description based on print version record. Bibliography: l. 39.