The Experts below are selected from a list of 5028 Experts worldwide ranked by ideXlab platform

Da Wei Liu - One of the best experts on this subject based on the ideXlab platform.

  • Strength Analysis for Lifting Mechanism of Dump Truck Based on Virtual Prototype and Finite Element Technology
    Advanced Materials Research, 2013
    Co-Authors: Long Long Zhu, Da Wei Liu, Wei Fan
    Abstract:

    In order to study the strength analysis of dump truck with a T-type Lifting Mechanism, a detailed multi-body dynamic model of a dump truck was established by using SIMPACK software. With this rigid-flexible coupling model, which includes front suspension, balanced rear suspension, carriage, Lifting Mechanism, tyre model and so on. Dynamical analysis was carried on the dump truck, the variation of application force of Lifting Mechanism with Lifting angle was obtained. Finite element model of a dump truck was established by using Hypermesh software. Strength Analysis was studied on the dump truck. This study will provide scientific reference for the structural design and improvements of Lifting Mechanism.

  • Fatigue Life Analysis of Lifting Mechanism Rod Based on Virtual Prototyping and FEM
    Advanced Materials Research, 2013
    Co-Authors: Da Wei Liu, Long Long Zhu
    Abstract:

    In order to calculate fatigue life of dump truck Lifting Mechanism’s structure components, a virtual prototyping model of Lifting Mechanism was built with Multi-body Dynamic Simulation Software ADAMS. The variation of applied force of Lifting Mechanism rod with Lifting angle was obtained from dynamic analysis of Lifting Mechanism. A finite element (FEM) model of the rod was established using FEM Software MSC.PATRAN/NASTRAN, and its structural strength was analyzed. On this basis, S-N curve of the rod and linear cumulative damage law was combined to calculate the rod’s fatigue life with Fatigue Analysis Software MSC.Fatigue using nominal stress method. This study provided a reference for the design and improvement of the Lifting Mechanism.

  • Dynamic Analysis of Lifting Mechanism Based on Rigid-Flexible Coupling
    Advanced Materials Research, 2013
    Co-Authors: Da Wei Liu, Bin Tian
    Abstract:

    To obtain realistic dynamic characteristics of the Lifting Mechanism, the liftarm and drawbar were regarded as flexible bodies. The modal neutral file (MNF) of liftarm and drawbar were obtained from modal analysis conducted by finite element analysis (FEA) software MSC.Patran/Nastran . Then the MNF were translated into ADAMS, a rigid-flexible coupling model of the lift Mechanism was built by replacing the rigid bodies with MNF. The forces of each hinge points in the rigid-flexible system, which were obtained from dynamic analysis, were compared with the rigid ones. The results showed that forces obtained from the rigid-flexible system were smaller than the rigid ones, which provided a reference for the design and improvement of the Lifting Mechanism.

  • Dynamic Characteristics Simulation for Lifting Mechanism of Dump Truck Based on Virtual Prototype
    Applied Mechanics and Materials, 2012
    Co-Authors: Rong Chao Jiang, Da Wei Liu, Zhong Chang Wang, Wei Fan
    Abstract:

    In order to study the dynamic characteristics of dump truck with a T-type Lifting Mechanism, a detailed multi-body dynamic model of a dump truck was established by using SIMPACK software. With this model, which includes front suspension, balanced rear suspension, carriage, Lifting Mechanism, tyre model and so on, the kinematics and dynamics of the dump truck were studied by simulation. The variation of angular velocity, angular acceleration and applied force of carriage, tension rod and cylinder with Lifting angle were obtained. This study will provide scientific reference for the structural design and strength analysis of Lifting Mechanism.

Stanislaw D. Augustynowicz - One of the best experts on this subject based on the ideXlab platform.

  • Insulation-Testing Cryostat With Lifting Mechanism
    2010
    Co-Authors: James E. Fesmire, Adam G. Dokos, B. E. Scholtens, Z. F. Nagy, Stanislaw D. Augustynowicz
    Abstract:

    The figure depicts selected aspects of an apparatus for testing thermal-insulation materials for cryogenic systems at temperatures and under vacuum or atmospheric conditions representative of those encountered in use. This apparatus, called "Cryostat-100," is based on the established cryogen-boil-off calorimeter method, according to which the amount of heat that passes through an insulation specimen to a cryogenic fluid in a container, and thus the effective thermal conductance of the specimen, is taken to be proportional to the amount of the cryogenic fluid that boils off from the container. The design of Cryostat-100 is based partly on, and incorporates improvements over, the design of a similar prior apparatus called "Cryostat-1" described in "Improved Methods of Testing Cryogenic Insulation Materials" (KSC-12107 & KSC- 12108), NASA Tech Briefs, Vol. 24, No. 12 (December 2000), page 46. The design of Cryostat-100 also incorporates the best features of two other similar prior apparatuses called "Cryostat-2" (also described in the cited prior article) and "Cryostat- 4." Notable among the improvements in Cryostat-100 is the addition of a Lifting Mechanism that enables safe, rapid, reliable insertion and removal of insulation specimens and facilitates maintenance operations that involve Lifting. As in Cryostat-1, the cold mass is a vertical stainless-steel cylindrical vessel subdivided into a larger measurement vessel with smaller thermal-guard vessels at both ends. During operation, all three vessels are kept filled with liquid nitrogen near saturation at ambient pressure (temperature .77.4 K). The cold mass of Cryostat-100 has a length of 1 m and diameter of 168 mm. Each specimen has a corresponding nominal length and inner diameter and a nominal thickness of 25.4 mm. Specimens that are shorter and have thicknesses between 0 and 50 mm are also acceptable. Bulk-fill, foam, clam-shell, multilayer insulation, and layered materials can be tested over a very wide range of thermal transmission: apparent thermal conductivity from 0.01 to 60 mW/m-K and heat flux from 0.1 to 500 W/sq m. A test in Cryostat-100 can be conducted at any desired gas pressure between ambient atmospheric pressure at one extreme and a vacuum with residual pressure

  • Insulation-Testing Cryostat With Lifting Mechanism
    2010
    Co-Authors: James E. Fesmire, Adam G. Dokos, B. E. Scholtens, Z. F. Nagy, Stanislaw D. Augustynowicz
    Abstract:

    The figure depicts selected aspects of an apparatus for testing thermal-insulation materials for cryogenic systems at temperatures and under vacuum or atmospheric conditions representative of those encountered in use. This apparatus, called "Cryostat-100," is based on the established cryogen-boil-off calorimeter method, according to which the amount of heat that passes through an insulation specimen to a cryogenic fluid in a container, and thus the effective thermal conductance of the specimen, is taken to be proportional to the amount of the cryogenic fluid that boils off from the container. The design of Cryostat-100 is based partly on, and incorporates improvements over, the design of a similar prior apparatus called "Cryostat-1" described in "Improved Methods of Testing Cryogenic Insulation Materials" (KSC-12107 & KSC- 12108), NASA Tech Briefs, Vol. 24, No. 12 (December 2000), page 46. The design of Cryostat-100 also incorporates the best features of two other similar prior apparatuses called "Cryostat-2" (also described in the cited prior article) and "Cryostat- 4." Notable among the improvements in Cryostat-100 is the addition of a Lifting Mechanism that enables safe, rapid, reliable insertion and removal of insulation specimens and facilitates maintenance operations that involve Lifting. As in Cryostat-1, the cold mass is a vertical stainless-steel cylindrical vessel subdivided into a larger measurement vessel with smaller thermal-guard vessels at both ends. During operation, all three vessels are kept filled with liquid nitrogen near saturation at ambient pressure (temperature .77.4 K). The cold mass of Cryostat-100 has a length of 1 m and diameter of 168 mm. Each specimen has a corresponding nominal length and inner diameter and a nominal thickness of 25.4 mm. Specimens that are shorter and have thicknesses between 0 and 50 mm are also acceptable. Bulk-fill, foam, clam-shell, multilayer insulation, and layered materials can be tested over a very wide range of thermal transmission: apparent thermal conductivity from 0.01 to 60 mW/m-K and heat flux from 0.1 to 500 W/sq m. A test in Cryostat-100 can be conducted at any desired gas pressure between ambient atmospheric pressure at one extreme and a vacuum with residual pressure

Long Long Zhu - One of the best experts on this subject based on the ideXlab platform.

  • Strength Analysis for Lifting Mechanism of Dump Truck Based on Virtual Prototype and Finite Element Technology
    Advanced Materials Research, 2013
    Co-Authors: Long Long Zhu, Da Wei Liu, Wei Fan
    Abstract:

    In order to study the strength analysis of dump truck with a T-type Lifting Mechanism, a detailed multi-body dynamic model of a dump truck was established by using SIMPACK software. With this rigid-flexible coupling model, which includes front suspension, balanced rear suspension, carriage, Lifting Mechanism, tyre model and so on. Dynamical analysis was carried on the dump truck, the variation of application force of Lifting Mechanism with Lifting angle was obtained. Finite element model of a dump truck was established by using Hypermesh software. Strength Analysis was studied on the dump truck. This study will provide scientific reference for the structural design and improvements of Lifting Mechanism.

  • Fatigue Life Analysis of Lifting Mechanism Rod Based on Virtual Prototyping and FEM
    Advanced Materials Research, 2013
    Co-Authors: Da Wei Liu, Long Long Zhu
    Abstract:

    In order to calculate fatigue life of dump truck Lifting Mechanism’s structure components, a virtual prototyping model of Lifting Mechanism was built with Multi-body Dynamic Simulation Software ADAMS. The variation of applied force of Lifting Mechanism rod with Lifting angle was obtained from dynamic analysis of Lifting Mechanism. A finite element (FEM) model of the rod was established using FEM Software MSC.PATRAN/NASTRAN, and its structural strength was analyzed. On this basis, S-N curve of the rod and linear cumulative damage law was combined to calculate the rod’s fatigue life with Fatigue Analysis Software MSC.Fatigue using nominal stress method. This study provided a reference for the design and improvement of the Lifting Mechanism.

Wei Fan - One of the best experts on this subject based on the ideXlab platform.

  • Strength Analysis for Lifting Mechanism of Dump Truck Based on Virtual Prototype and Finite Element Technology
    Advanced Materials Research, 2013
    Co-Authors: Long Long Zhu, Da Wei Liu, Wei Fan
    Abstract:

    In order to study the strength analysis of dump truck with a T-type Lifting Mechanism, a detailed multi-body dynamic model of a dump truck was established by using SIMPACK software. With this rigid-flexible coupling model, which includes front suspension, balanced rear suspension, carriage, Lifting Mechanism, tyre model and so on. Dynamical analysis was carried on the dump truck, the variation of application force of Lifting Mechanism with Lifting angle was obtained. Finite element model of a dump truck was established by using Hypermesh software. Strength Analysis was studied on the dump truck. This study will provide scientific reference for the structural design and improvements of Lifting Mechanism.

  • Dynamic Characteristics Simulation for Lifting Mechanism of Dump Truck Based on Virtual Prototype
    Applied Mechanics and Materials, 2012
    Co-Authors: Rong Chao Jiang, Da Wei Liu, Zhong Chang Wang, Wei Fan
    Abstract:

    In order to study the dynamic characteristics of dump truck with a T-type Lifting Mechanism, a detailed multi-body dynamic model of a dump truck was established by using SIMPACK software. With this model, which includes front suspension, balanced rear suspension, carriage, Lifting Mechanism, tyre model and so on, the kinematics and dynamics of the dump truck were studied by simulation. The variation of angular velocity, angular acceleration and applied force of carriage, tension rod and cylinder with Lifting angle were obtained. This study will provide scientific reference for the structural design and strength analysis of Lifting Mechanism.

James E. Fesmire - One of the best experts on this subject based on the ideXlab platform.

  • Insulation-Testing Cryostat With Lifting Mechanism
    2010
    Co-Authors: James E. Fesmire, Adam G. Dokos, B. E. Scholtens, Z. F. Nagy, Stanislaw D. Augustynowicz
    Abstract:

    The figure depicts selected aspects of an apparatus for testing thermal-insulation materials for cryogenic systems at temperatures and under vacuum or atmospheric conditions representative of those encountered in use. This apparatus, called "Cryostat-100," is based on the established cryogen-boil-off calorimeter method, according to which the amount of heat that passes through an insulation specimen to a cryogenic fluid in a container, and thus the effective thermal conductance of the specimen, is taken to be proportional to the amount of the cryogenic fluid that boils off from the container. The design of Cryostat-100 is based partly on, and incorporates improvements over, the design of a similar prior apparatus called "Cryostat-1" described in "Improved Methods of Testing Cryogenic Insulation Materials" (KSC-12107 & KSC- 12108), NASA Tech Briefs, Vol. 24, No. 12 (December 2000), page 46. The design of Cryostat-100 also incorporates the best features of two other similar prior apparatuses called "Cryostat-2" (also described in the cited prior article) and "Cryostat- 4." Notable among the improvements in Cryostat-100 is the addition of a Lifting Mechanism that enables safe, rapid, reliable insertion and removal of insulation specimens and facilitates maintenance operations that involve Lifting. As in Cryostat-1, the cold mass is a vertical stainless-steel cylindrical vessel subdivided into a larger measurement vessel with smaller thermal-guard vessels at both ends. During operation, all three vessels are kept filled with liquid nitrogen near saturation at ambient pressure (temperature .77.4 K). The cold mass of Cryostat-100 has a length of 1 m and diameter of 168 mm. Each specimen has a corresponding nominal length and inner diameter and a nominal thickness of 25.4 mm. Specimens that are shorter and have thicknesses between 0 and 50 mm are also acceptable. Bulk-fill, foam, clam-shell, multilayer insulation, and layered materials can be tested over a very wide range of thermal transmission: apparent thermal conductivity from 0.01 to 60 mW/m-K and heat flux from 0.1 to 500 W/sq m. A test in Cryostat-100 can be conducted at any desired gas pressure between ambient atmospheric pressure at one extreme and a vacuum with residual pressure

  • Insulation-Testing Cryostat With Lifting Mechanism
    2010
    Co-Authors: James E. Fesmire, Adam G. Dokos, B. E. Scholtens, Z. F. Nagy, Stanislaw D. Augustynowicz
    Abstract:

    The figure depicts selected aspects of an apparatus for testing thermal-insulation materials for cryogenic systems at temperatures and under vacuum or atmospheric conditions representative of those encountered in use. This apparatus, called "Cryostat-100," is based on the established cryogen-boil-off calorimeter method, according to which the amount of heat that passes through an insulation specimen to a cryogenic fluid in a container, and thus the effective thermal conductance of the specimen, is taken to be proportional to the amount of the cryogenic fluid that boils off from the container. The design of Cryostat-100 is based partly on, and incorporates improvements over, the design of a similar prior apparatus called "Cryostat-1" described in "Improved Methods of Testing Cryogenic Insulation Materials" (KSC-12107 & KSC- 12108), NASA Tech Briefs, Vol. 24, No. 12 (December 2000), page 46. The design of Cryostat-100 also incorporates the best features of two other similar prior apparatuses called "Cryostat-2" (also described in the cited prior article) and "Cryostat- 4." Notable among the improvements in Cryostat-100 is the addition of a Lifting Mechanism that enables safe, rapid, reliable insertion and removal of insulation specimens and facilitates maintenance operations that involve Lifting. As in Cryostat-1, the cold mass is a vertical stainless-steel cylindrical vessel subdivided into a larger measurement vessel with smaller thermal-guard vessels at both ends. During operation, all three vessels are kept filled with liquid nitrogen near saturation at ambient pressure (temperature .77.4 K). The cold mass of Cryostat-100 has a length of 1 m and diameter of 168 mm. Each specimen has a corresponding nominal length and inner diameter and a nominal thickness of 25.4 mm. Specimens that are shorter and have thicknesses between 0 and 50 mm are also acceptable. Bulk-fill, foam, clam-shell, multilayer insulation, and layered materials can be tested over a very wide range of thermal transmission: apparent thermal conductivity from 0.01 to 60 mW/m-K and heat flux from 0.1 to 500 W/sq m. A test in Cryostat-100 can be conducted at any desired gas pressure between ambient atmospheric pressure at one extreme and a vacuum with residual pressure