The Boeing Company

Jung-Chuan Lee

Mostafa Rassaian

Peter S Guard

Paul E Mikulencak

Joshua M Montgomery

David W Twigg

Josh M Montgomery

Richard William Brigman

Mark A Stadum

Terry N Christenson

A computer-performed method of designing a structure. User-selected design parameters are input to a parametric model of the structure. Boundary conditions and load conditions are applied to the model to determine a response of the structure to the conditions. Based on the load conditions, an analysis method is selected. The modeled response is analyzed using the selected analysis method to obtain power spectral density (PSD) values for the model. The PSD values are averaged over a user-selected frequency range to evaluate the design parameters for acoustic transmission loss. This method provides a high degree of flexibility in formulating structural design analyses.

Analyzing structural design relative to vibrational and/or acoustic loading

A computer implemented method, apparatus, and computer usable program code for analyzing durability of electronic components. A finite element model for the chassis is created. A set of finite element models for a set of printed wiring assemblies are created, wherein the printed wiring assemblies are for use with chassis and include the electronic components. The finite element model for the chassis is combined with the set of finite element models to form a combined finite element model. A finite element analysis of the combined finite element model is performed to form results. The combined model results are transferred to the printed wiring board models. Using the transferred results, stresses and strains are calculated for individual solder joints/leads. A fatigue analysis is performed for the electronic components in the set of printed wiring assemblies based on these stresses and strains, using the results to identify the durability of the electronic components.

Method and apparatus for integrated hierarchical electronics analysis

A window for a subsonic passenger aircraft that provide maximum optical visibility while minimizing the amount of exterior acoustic noise transmitted through the windows to the passenger cabin during flight of the aircraft includes at least one substantially transparent window pane having the shape of an ellipse. The ellipse has a major axis and a minor axis, and the major axis is about twice as long as the minor axis and is disposed generally perpendicular to the direction of flight of the aircraft. In one exemplary embodiment, the window has a height of about 20 inches and a transparent area of about 141 square inches, and includes a pair of substantially similar window panes disposed in a parallel, spaced-apart relationship circumscribed by a mounting bezel. A plurality of the windows are each mounted with the bezels in spaced-apart rows in each of the opposite sidewalls of the aircraft fuselage.

Optimal aircraft window shape for noise control

Growing community of inventors

Federal Way, WA, United States of America

Jung-Chuan Lee