Abstract. The dynamic load-sharing characteristics of aircraft face gear dual-power split transmission system (FGDPSTS) are taken as the research object. Considering factors time-varying meshing stiffness, comprehensive error, backlash, support clearance, spline torsional and model was constructed based on lumped-parameter method. loaded tooth contact analysis (LTCA) simulation method used to c...

The precision rotary vector reducer with involute variable tooth thickness (PRVT) is a high-performance transmission device, which very suitable for aerospace, medical machinery, industrial robots, automation equipment, and other fields, its torsional stiffness an important performance index. This paper establishes dynamics model of the whole machine based on Lagrangian method by considering ge...

The elastic vibration of the wheelset is a potential factor inducing wheel-rail defects. It important to understand natural characteristics flexible for slowing down defect growth. To estimate free railway with multidiameter axle, transfer matrix method (TMM) applied. matrices four types beam models are derived including Euler–Bernoulli beam, Timoshenko without mass and shearing stiffness, mass...

Considering viscoelastic saturated soil, The transient dynamic response of an elastic pile is studied. The pile-soil system is divided into thin layers, the control equations of the soil are solved respectively by using Laplace transform. Considering the mixed boundary-value conditions at the interface of pile and soil, expression is derived to describe the relationship between the inner force ...

Crack path selection in mixed mode fracture tests of adhesive bonds, including those with locally weakened interfaces Adhesives offer many advantages over discrete mechanical fasteners such as bolts and rivets. By eliminating the holes or other mechanical fasteners, components may often be made thinner that will save weight, time, and costs. Because adhesives are often applied continuously and ...

BACKGROUND Several strategies to reduce construct stiffness have been proposed to promote secondary bone healing following fracture fixation with locked bridge plating constructs. However, stiffness reduction is typically gained at the cost of construct strength. In the present study, we tested whether a novel strategy for stiffness reduction, termed far cortical locking, can significantly redu...

An active flutter suppression using linear sub-optimal control scheme is investigated for a 2dof airfoil system with nonlinear torsional stiffness and limited deflection amplitude of its single actuator. The suppression of limit cycle oscillations in the nonlinear closed-loop system is achieved through maximization of the stability region of its linearized system. The critical value of the cont...