Investigation of Landing Gear Impact Stress

• Main Authors: Po-yen Tseng, 曾泊彥
• Other Authors: Chih-I Chu
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/75181077308752836107

碩士 === 逢甲大學 === 機械工程學所 === 100 === This research explores the dynamic impacts of replacing main gear’s strut from a rigid body to a flexible body on air crafts’ landing stability. The objective used Partan’s modal analysis theory to superpose the transformation of landing gears from ridged strut to flexible strut. The objective also used Adams’ software to carry out dynamic simulation analysis. There are two reasons for using a combination of Partan’s and Adam’s theories instead of the conventional Finite element analysis approach. First, this approach takes less time to run. Second, it enables a multi-level analysis by taking differences in landing speed, landing gear thickness, and dynamic or static state of the landing gear into consideration. Vis this approach, The objective was able to compare the how the use of flexible or rigid strut affect cross wind landing and level landing under the circumstances or normal or lateral impact. The result indicates that the increase of landing gear thickness combined with higher landing speed can lead to higher impact and thus reduce aircrafts’ landing stability. As thickness increases, landing gear will become less flexible and therefore decrease its ability to absorb landing impact. The theoretical and practical implications of the findings are addressed at the concluding part of this thesis.