Advanced methods for 3-D inelastic structural analysis for hot engine structures

Three-dimensional Inelastic Analysis Methods are described. These methods were incorporated into a series of new computer codes embodying a progression of mathematical models (mechanics of materials, specialty finite element, boundary element) for streamlined analysis of hot engine structures such as: (1) combustor liners, (2) turbine blades, and (3) turbine vanes. These models address the effects of high temperatures and thermal/mechanical loadings on the local (stress/strain) and global (displacements, frequencies, amplitudes, buckling) structural behavior of the three respective components. The methods and the three computer codes, referred to as MOMM (Mechanics Of Materials Model), MHOST (MARC-Hot Section Technology), and BEST3D (Boundary Element Stress Technology), have been developed and are briefly described

On 3-D inelastic analysis methods for hot section components (base program)

A 3-D Inelastic Analysis Method program is described. This program consists of a series of new computer codes embodying a progression of mathematical models (mechanics of materials, special finite element, boundary element) for streamlined analysis of: (1) combustor liners, (2) turbine blades, and (3) turbine vanes. These models address the effects of high temperatures and thermal/mechanical loadings on the local (stress/strain)and global (dynamics, buckling) structural behavior of the three selected components. Three computer codes, referred to as MOMM (Mechanics of Materials Model), MHOST (Marc-Hot Section Technology), and BEST (Boundary Element Stress Technology), have been developed and are briefly described in this report

3-D inelastic analysis methods for hot section components (base program)

A 3-D inelastic analysis methods program consists of a series of computer codes embodying a progression of mathematical models (mechanics of materials, special finite element, boundary element) for streamlined analysis of combustor liners, turbine blades, and turbine vanes. These models address the effects of high temperatures and thermal/mechanical loadings on the local (stress/strain) and global (dynamics, buckling) structural behavior of the three selected components. These models are used to solve 3-D inelastic problems using linear approximations in the sense that stresses/strains and temperatures in generic modeling regions are linear functions of the spatial coordinates, and solution increments for load, temperature and/or time are extrapolated linearly from previous information. Three linear formulation computer codes, referred to as MOMM (Mechanics of Materials Model), MHOST (MARC-Hot Section Technology), and BEST (Boundary Element Stress Technology), were developed and are described

Discourse analysis of corporate codes of ethics : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Accountancy at Massey University, Manawatū, New Zealand

Ethics has always been an important element in economic activities. Ethical guidelines in the form of values, beliefs, norms, guidelines and rules have been developed over the years to set boundaries for appropriate business behaviour. Although time and context may have changed, the core of ethical problems inherent in business remains. In recent years, increased public concerns about corporate ethics have seen extant ethical rules being codified into formal codes of ethics. As a crucial part of corporate discourse, a code of ethics of an organisation signals its ethical commitment to self-restraint and selfregulation. It is often observed that corporate codes are instituted only after some legitimacy-threatening events and that they are used as a strategy to restore trust and organisational legitimacy. The impetus for this study arose from a desire to provide an understanding of the discursive role of corporate codes of ethics in (re)claiming public trust and legitimacy in light of increasing challenges to corporate legitimacy. As corporate codes are taken as the basis for discourses designed to provide ethical guidance, they constitute an important means to uphold trust and legitimacy for organisations. The study examines 100 global corporate codes of ethics using a three-level analytical framework based on discourse theory to capture the relationship between the “text” and the “context” of the codes. In the process of discourse analysis, it explores the historical (inclusive of cultural, social, and economic) context of code development (macro level), employs institutional theory to interpret the institutional context of corporations (meso level), and examines the content/text of the codes (micro level) by drawing on Aristotle’s three rhetorical justifications (logos, ethos, and pathos) to ascertain how the sample companies persuade their audiences to accept their ethical commitments. There is evidence that the code language employed by the 100 sample global companies is sufficiently persuasive to support the pragmatic, cognitive, and moral legitimising causes. However, it is found that the content of codes is comparatively light in ethical substance as it tends to focus on behavioural constraints specifically designed to address the pressing legitimacy issues and the compliance of rules relating to these constraints

Application of advanced computational codes in the design of an experiment for a supersonic throughflow fan rotor

Increased emphasis on sustained supersonic or hypersonic cruise has revived interest in the supersonic throughflow fan as a possible component in advanced propulsion systems. Use of a fan that can operate with a supersonic inlet axial Mach number is attractive from the standpoint of reducing the inlet losses incurred in diffusing the flow from a supersonic flight Mach number to a subsonic one at the fan face. The design of the experiment using advanced computational codes to calculate the components required is described. The rotor was designed using existing turbomachinery design and analysis codes modified to handle fully supersonic axial flow through the rotor. A two-dimensional axisymmetric throughflow design code plus a blade element code were used to generate fan rotor velocity diagrams and blade shapes. A quasi-three-dimensional, thin shear layer Navier-Stokes code was used to assess the performance of the fan rotor blade shapes. The final design was stacked and checked for three-dimensional effects using a three-dimensional Euler code interactively coupled with a two-dimensional boundary layer code. The nozzle design in the expansion region was analyzed with a three-dimensional parabolized viscous code which corroborated the results from the Euler code. A translating supersonic diffuser was designed using these same codes