Nonlinear Dynamic Response Optimization Using the Equivalent Static Loads for a Joined-Wing
Abstract
The joined-wing airplane proposed by Wolkovich in 1986 is defined as an airplane that incorporates tandem wings arranged to form diamond shapes in both top and front views. The joined-wing can lead to increased aerodynamic performances as well as reduction of the structural weight. However, the joined-wing has high geometric nonlinearity under the gust load. The gust load acts as a dynamic load. In previous researches, linear dynamic response optimization and nonlinear static responses optimization are performed. In this research, nonlinear dynamic response optimization of a joined-wing is carried out by using "equivalent static loads," a concept expanded and newly proposed for nonlinear dynamic response optimization. Equivalent static loads are the load sets which generate the same response field in linear static analysis as that from nonlinear dynamic analysis by repeated use of linear response optimization. For the verification of efficiency of the proposed method, a simple nonlinear dynamic response optimization problem is introduced. The problem is solved by using both the equivalent static loads method and the conventional method with sensitivity analysis using the finite difference method. The procedure for nonlinear dynamic response optimization of a joined-wing using equivalent static loads is explained and the optimum results are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2008
- Accession Number
- ADA487090
Entities
People
- Gyung-jin Park
Organizations
- Hanyang University