Nonlinear Response Analysis of Soil Layers Under Severe Earthquake

The precise model and the analysis of nonlinear response are important for the landing gear research. In this paper, the FEM model of landing gear was established. The shock absorber is modeled with the nonlinear spring and damper. Random displacements were applied for simulating runway unevenness at aircraft taxiing. Through the simulation, the nonlinear FEM dynamic response of landing gear was acquired. The results show that: the stress of landing gear is large in the landing progress, especially for the random displacements; the weakness of landing gear is the axle sleeve. So the material and technology of the axle sleeve are important in the design of landing gear.

Download Full-text

Nonlinear response analysis of marine risers

Computers & Structures ◽

10.1016/0045-7949(92)90145-p ◽

1992 ◽

Vol 43 (2) ◽

pp. 281-295 ◽

Cited By ~ 6

Author(s):

S. Ahmad ◽

T.K. Datta

Keyword(s):

Nonlinear Response ◽

Response Analysis ◽

Marine Risers

Download Full-text

Nonlinear Analysis of Hysteretic-Friction Isolation System with Displacement-Constraint Device

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.90-93.3173 ◽

2011 ◽

Vol 90-93 ◽

pp. 3173-3179

Author(s):

Gui Feng Zhao ◽

Yu Hong Ma ◽

Yong Shan Zhang ◽

Zuo Yu Sun

Keyword(s):

Nonlinear Analysis ◽

Nonlinear Response ◽

Processing Method ◽

Response Analysis ◽

Analysis Program ◽

Isolation System ◽

Isolation Layer ◽

Displacement Constraint ◽

Inflection Points ◽

Judgment Condition

For the displacement-constraint device with hysteric-friction isolation system, the judgment condition of soft-collision between the isolation layer and displacement-constraint device is put forward, the motion equation of the isolation system in consideration of friction and soft-collision is established, the nonlinear analysis program is worked out, and several kinds of inflection points in the program are given and the corresponding processing method of the inflection points is introduced. The nonlinear response analysis of the isolation system results indicate the displacement-restraint device can ensure the upper structure safety; also can decrease the displacement of the isolated layer.

Download Full-text