1,721,053 research outputs found
A test rig for the investigation of the dynamic response of a bladed disk with underplatform dampers
No full textThe paper presents the planning, structure and preliminary results of a new test rig for the validation of numerical models that calculate the dynamic response of bladed disks with underplatform dampers (UPDs
The residual stress state due to machining of turbine components: experimental investigation
No full textInfluence of cutting parameters on residual stresses induced by milling in pressure die-cast aluminium alloy components
No full textAcoustoelastic effect in different metallic materials”, Atti XXV AIAS National Conference
No full text
Competitive time marching solution methods for systems with friction-induced nonlinearities
Full text linkFinding efficient and accurate solution methods for nonlinear equilibrium equations is a challenging task. This is the case of systems with friction-induced nonlinearities, e.g., friction-damped turbomachinery assemblies and automotive applications such as brakes. In order to tackle this strategic task, several methods have been developed, both in the time and in the frequency domains.
Time marching methods are regarded as the most accurate option, but their computational cost becomes prohibitive when friction nonlinearities are present. This poses a problem in all those cases where alternative frequency domain methods cannot be applied effectively, e.g., if transients, non-periodic excitation/solution, or highly nonlinear systems are of interest. The purpose of this paper is to propose three independent methods to make time-marching more competitive. Two of these methods can be applied to any existing direct integration scheme with minimal adjustments, but the computational time cut they introduce is significant. The last method is instead tailored for systems where the inertia force contribution is negligible. All methods are thoroughly validated numerically using a standard Newmark-β integration scheme as a reference
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