Sökning: "viscous damping"

Visar resultat 11 - 15 av 15 uppsatser innehållade orden viscous damping.

  1. 11. Influence of the Non-linear Effects in the Design of Viscous Dampers for Bridge Cables

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Yalda Acar; Pontus Jingstål; [2014]
    Nyckelord :Bridge cables; external viscous damper; half-power bandwidth method; loss factor; non-linear vibration; Brokabel; externa viskösa dämpare; half-power bandwidth metoden; förlustfaktor; icke-linjära vibrationer;

    Sammanfattning : In this master thesis the performance of external viscous dampers attached to cables in cable-stayed bridges have been studied. A comparison has been performed between a linear and a non-linear cable model. The comparison was carried out for two bridge cables, one from the Dubrovnik Bridge and the other from the Normandie Bridge. LÄS MER

  3. 12. Development of a Parallel Finite-element Tool for Dynamic Soil-structure Interaction : A Preliminary Case Study on the Dynamic Stiffness of a Vertical Pile

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Mårten Ullberg; [2012]
    Nyckelord :dynamic stiffness and damping; finite-element analysis; steady-state analysis; parallel calculations; PETSc; piles; pile-groups;

    Sammanfattning : This thesis has two major goals; first to develop scalable scripts for steady-state analysis, then to perform a case study on the dynamic properties of a vertical pile. The scripts are based on the numerical library PETSc for parallel linear algebra. This opens up the opportunity to use the scripts to solve large-scale models on supercomputers. LÄS MER

  4. 13. Physical Modeling and Simulation Analysis of an Advanced Automotive Racing Shock Absorber using the 1D Simulation Tool AMESim

    Master-uppsats, Fluida och mekatroniska system; Tekniska högskolan

    Författare :Maryam Sadeghi Reineh; [2012]
    Nyckelord :Passive shock absorber; hydraulic; 1D modeling;

    Sammanfattning : Shock absorbers are crucial components of a vehicle’s chassis responsible for the trade-off between stability, handling, and passenger comfort. The aim of the thesis is to investigate the physical behavior of an advanced automotive racing shock absorber, known as TTR, developed by Öhlins Racing AB. LÄS MER

  5. 14. Determining the pressure distribution on submerged 2D bodies using dissipative potential flow.

    Master-uppsats, KTH/Marina system

    Författare :Mirjam Fürth; [2011]
    Nyckelord :;

    Sammanfattning : Globalization is reaching the furthest corners of the world and with globalizations comes a rising demand on transportation. In shipping; a significant cost both to the ship owners and the environment are the fossil fuels used for propulsion, even a small reduction in the wave resistance can bring considerable reductions both in operating costs and emissions for such ships. LÄS MER

  7. 15. Modellering och reglering av mjölkningsrobot

    Uppsats för yrkesexamina på grundnivå, Institutionen för systemteknik

    Författare :Fredrik Karlsson; Mattias Kastman; [2002]
    Nyckelord :Reglerteknik; modellering; reglering; pneumatik; robot; friktion; ventil; cylinder; Reglerteknik;

    Sammanfattning : In this master thesis a robot arm belonging to an automatic milking machine from DeLaval is investigated. The robot arm is controlled by a pneumatic cylinder and a valve. The goal of the master thesis is to investigate instability problems and to find out if it is possible to solve them by using gain scheduling. LÄS MER