A STUDY OF LONGITUDINAL DYNAMIC STABILITY CRITERIA FOR TORPEDOES,
Abstract
The limitations of conventional longitudinal dynamic stability analyses are assessed for the case of a deeply submerged torpedo with a level, straight course equilibrium condition. It is found that the motion equations used previously for stability analyses are valid only when applied to a neutrally buoyant body with the center of gravity directly above or below the center of buoyancy. In other cases, the equilibrium elevator and pitch angles are not zero and this causes certain first order hydrodynamic and inertial terms to appear in the equations which have been ignored in past analyses. The most important of these are hydrodynamic derivatives of vertical force and pitch moment with respect to longitudinal velocity. It is shown that these omissions can cause erroneous predictions of dynamic stability. The results of the study are incorporated in a set of simplified longitudinal stability criteria. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1963
- Accession Number
- AD0601739
Entities
People
- A. Strumpf
- G. Anguil
Organizations
- Stevens Institute of Technology