Structural Stiffness Analysis Research Articles

Simulation and design optimization of embedded steam baking integrated machine bottom plate structure

To address the challenges related to excessive deformation of the bottom plate during the opening and closing of the steam-baking integrated machine door, a comprehensive approach that incorporates finite element simulation and experimental testing was employed to investigate the plate’s deformation characteristics. Various structural parameters influencing the bottom plate were evaluated, and a series of enhancement strategies for the bottom plate structure were proposed. Following the optimization process, subsidence deformation of the bottom plate was reduced by 64%, and warpage deformation was reduced by 13.6%. Thus, a solid groundwork was established for subsequent structural stiffness analysis and optimization endeavors in the realm of embedded steam-baking integrated machines.

A latest-generation fluoride with excellent structural stiffness for ultra-efficient photoluminescence and specific four-peak emission temperature sensing

LiYF4:Ln3+ exhibits multi-wavelength-excitation self-sensitization, ultra-efficient PL and specific four-peak emission temperature sensing, as confirmed from crystal structure, electronic band, morphological, and structural stiffness analysis.

전개형 경량 위성 안테나 반사판의 재료분석 및 형상 최적화

In this paper, we reviewed major design parameters for a solid type of deployable antenna and its structural design. We performed modal analysis for a single reflector panel made of aluminum and CFRP (carbon fiber reinforced plastic) to confirm the appropriateness of selected materials. We then predicted the elastic modulus of CFRP using the principles of unidirectional composite elasticity stiffness predictions such as the ROM (Rule of Mixture) and HSR (Hart Smith 10% Rule). To optimize the shape of the antenna reflector, a structural stiffness analysis was performed using derived numerical optimization factors. Six structural stiffness analyses were performed using the constructed experimental design method. The resulting optimal shape conditions are proposed to meet the structural stiffness requirements while minimizing weight.

Structural Stiffness Analysis on Doors having Pyramidal Truss Cores in an Urban Transit Vehicle

Structural Stiffness Analysis on Doors having Pyramidal Truss Cores in an Urban Transit Vehicle

Position and stiffness analysis of a new asymmetric 2PRR–PPR parallel CNC machine

In this paper, structural stiffness analysis of a new 3-axis asymmetric planar parallel manipulator, a 2 P RR–P P R structural kinematic chain, is investigated. The manipulator is proposed as a tool holder for a 5-axis hybrid computer numerical control (CNC) machine. First, the structure of the robot is introduced and inverse kinematics solution is presented. Secondly, stiffness matrix of the robot is determined using a continuous method based on Castigliano’s theorem and calculation of strain energy of the robot components. This method removes the need for commonly used simplifying assumptions and, therefore, results in good accuracy. For this purpose, force and strain energy for each segment of the robot are analyzed. Finally, to verify the analytical results, commercial FEM software is used to simulate the physical structure of the manipulator. A numerical example is presented which confirms the correctness of the analytical formulations.

Research Status and Prospects of Cable Domes

Advances in the research on cable domes were summarized and reviewed, such as structural improvements and innovation, prestressed mode and optimize designing of cable dome structure, dynamic and wind resistance performance analysis, construction technology, model experiment and sensitivity analysis. Some topics worthy further research were proposed, including seismic property study, improvement and innovation in construction techniques and methods, fire resistance study, stiffness analysis of structures, general design methods and software. This work will provide a meaningful reference for the design and application of cable domes.

Design of a Modified DELTA Parallel Mechanism Based on Structural Stiffness Analysis

In our previous work, we developed a compact 6-DOF haptic interface. The haptic interface contains a modified DELTA parallel-link positioning mechanism. A stiffness of the modified DELTA mechanism is affected by elastic deformations of both parts and bearings. Therefore, to design such a parallel mechanism, we should analyze structural stiffness of a parallel mechanism, including elastic deformation of both parts and bearings. Then, we have proposed an analysis method of structural stiffness for a parallel mechanism. ln this paper, we design a modified DELTA mechanism with a suitable stiffness, using our stiffness analysis method.

Closure to “Discussion of ‘Compliant Foil Bearing Structural Stiffness Analysis: Part I—Theoretical Model Including Strip and Variable Bump Foil Geometry’” (1992, ASME J. Tribol., 114, p. 400)

Closure to “Discussion of ‘Compliant Foil Bearing Structural Stiffness Analysis: Part I—Theoretical Model Including Strip and Variable Bump Foil Geometry’” (1992, ASME J. Tribol., 114, p. 400)

Compliant Foil Bearing Structural Stiffness Analysis: Part I—Theoretical Model Including Strip and Variable Bump Foil Geometry

This paper presents a theoretical model of corrugated foil strip (bump foil) deformation in compliant foil bearings and dampers. The friction forces between bump foils and the housing or the top foil, local interaction forces, variable load distributions, and bump geometries are taken into consideration. Following the trend of earlier published experimental data, the bumps near the fixed end have a much higher predicted stiffness (lower deflection) than those near the free end. Higher friction coefficients tend to increase stiffness and may pin down bumps near the fixed end. An increase in the friction coefficient between the top foil and the bump is a more effective method of achieving both Coulomb damping and higher stiffness. In addition to bump geometry, the load distribution profile greatly influences bump stiffness. A follow-up paper will present the experimental verification and discuss the comparison between theoretical and experimental results.

Posttensioned Trusses: Analysis and Design

More than 80% of the steel truss bridges inventoried in the United States are structurally deficient and/or functionally obsolete. Posttensioning these bridges using different posttensioned tendon layouts can be a cost‐effective method to strengthen them to meet current and future loading and traffic requirements. A method for the structural stiffness analysis of posttensioned trusses is suggested. The stiffness matrices of straight, one‐drape, and two‐drape tendon layouts are developed. The tendon layout need not coincide with the truss members. However, it can be externally or internally attached to the truss. A closed‐form solution for the relationship between the cross‐sectional area, posttensioning force of the tendon, and the desired final member stress after posttensioning is derived for a statically determinate truss. Posttensioning enlarges the elastic range, increases the fatigue resistance, increases redundancy, and reduces deflection and member stresses. Thus, the remaining life of a truss bri...