搜索结果: 1-15 共查到“工学 stiffness”相关记录15条 . 查询时间(0.046 秒)
Dynamic covalent bonds in self-healing, shape memory, and controllable stiffness hydrogels
Thiol-thioester exchange double-network hydrogels chitosan-based hydrogels on-demand dissolution acid-based hydrogels
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2024/1/11
Emerging technologies are increasingly reliant on materials that deliver multiple functionality. For example, hydrogels using dynamic covalent crosslinks have proven well-suited for the preparation of...
Phase based stiffness tuning algorithm for a magnetorheological elastomer dynamic vibration absorber
magnetorheological elastomer vibration absorber phase stiffness tuning vibration control
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2015/3/24
This paper presents a phase based stiffness tuning algorithm to overcome the uncertainty of the relation between the magnetic current and the natural frequency for magnetorheological elastomer (MRE) d...
Development of a real-time tunable stiffness and damping vibration isolator based on magnetorheological elastomer
ON–OFF control MRE voice coil motor isolator variable stiffness and damping
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2015/3/30
A tunable stiffness and damping vibration isolator based on magnetorheological elastomers (MREs) is developed. In this isolator, four MRE elements are used as the tunable springs, whose stiffness can ...
基于侧向变刚度的轮胎多边形磨损机理分析（Mechanism of Polygonal Wear of Tire Based on Variable Stiffness of Lateral）
车辆 轮胎 多边形磨损 变刚度 机理
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2010/12/29
考虑轮胎接地摩擦的非线性特性，建立了基于侧向变刚度的轮胎多边形磨损模型，并对系统的稳定性进行了分析，指出轮胎的自激振动是一种由系统Hopf分岔引起的稳定周期振动现象，通过数值仿真得到了引起胎面自激振动的车速和车轮前束角范围。结果表明：轮胎多边形磨损为一种典型的非线性自激振动现象，其发生与胎面的侧向振动有关，磨损边数近似等于胎面的侧向振动频率与车轮转动频率之比。所建模型能够很好地解释轮胎多边形磨损的...
Vehicle gearbox dynamics: centre distance influence on mesh stiffness and spur gear dynamics
vehicle gearbox spur gear mesh stiffness centre distance dynamics diagnostic
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2010/10/29
Vehicle gearbox dynamics is characterized by time varying mesh stiffness. The paper presents a survey of methods used for determining mesh stiffness and the analysis of the centre distance influence o...
结合面切向接触刚度分形模型建立与仿真（Fractal Model of Tangential Contact Stiffness of Joint Interfaces and Its Simulation）
结合面 切向接触刚度 分形模型 微接触面积分布函数
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2009/12/28
基于接触分形理论和微接触面积分布函数，建立了计及微接触面积分布的域扩展因子影响的结合面切向接触刚度分形模型，并通过数字仿真直观揭示了结合面切向接触刚度与结合面诸参数之间的非线性关系以及这些相关参数对切向接触刚度的影响规律。仿真研究结果表明，结合面切向接触刚度随着结合面法向载荷的增大而增大，随结合面切向载荷的增大而减小，随结合面分形特征长度尺度参数的增大而减小，但随结合面分形维数的变化规律比较复杂。
结合面法向接触刚度分形模型建立与仿真（Fractal Model and Simulation of Normal Contact Stiffness of Joint Interfaces and Its Simulation）
结合面 法向接触刚度 分形模型 仿真
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2009/11/24
基于接触分形理论和微接触大小分布函数，建立了计及微接触大小分布的域扩展因子影响的结合面法向接触刚度的分形模型，并通过对所建模型的数字仿真，直观地揭示了结合面法向接触刚度与结合面诸参数之间的非线性关系，探讨了这些相关参数对法向接触刚度的影响规律。研究仿真结果表明，结合面法向接触刚度随着结合面法向载荷的增大而增大，随结合面分形特征长度尺度参数的增大而减小，但随结合面分形维数的变化规律比较复杂。
Parameters which Affect the Stiffness of Bitumen and Bituminous Hot Mixes
Bitumen Bituminous Mixes Stifiness Parameters
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2009/10/13
This paper deals with bitumen and bituminous mixes, using suitable mathematical models that take into account the parameters a ecting their elastic and plastic sti nesses. These parameters are stress ...
Lateral Stiffness of Unreinforced Masonry Circular Columns under Cracked Conditions
Unreinforced masonry Circular columns Seismic behavior Lateral stioness Cracking
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2009/10/10
Both walls and columns are main structural elements of monumental buildings. In resisting seismic forces,the lateral sti ness of these elements is an essential parameter. Earthquakes may cause cracks ...
The SIMP-SRV Method for Stiffness Topology Optimization of Continuum Structures
Topology optimization Discrete variable SIMP method SRV constraint
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2009/8/19
This paper presents an algorithm of optimal cutting tool selection for machining of the pointbased surface that is defined by a set of surface points rather than parametric polynomial surface equation...
冲击载荷下磁流变变刚度变阻尼缓冲系统减振控制（Absorbing Control of Magneto-rheological Variable Stiffness and Damping System under Impact Load）
磁流变液 半主动控制 变刚度 冲击载荷
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2010/4/1
针对传统缓冲着陆装置阻尼刚度不可调节的局限性，提出采用基于磁流变技术的自适应变阻尼变刚度缓冲装置。首先从理论上研究了采用磁流变阻尼器实现刚度阻尼等效控制的原理，分析了刚度阻尼调节范围；进而设计了基于能量守恒原理和天棚阻尼控制技术的飞行器缓冲着陆的自适应控制器，最后通过数值分析考察缓冲器和控制策略的有效性。分析结果表明，与被动缓冲装置相比，基于磁流变技术的缓冲装置不仅能降低着陆冲击过程的峰值载荷，而...
Study on a Dynamic Stiffness-tuning Absorber with Squeeze-strain Enhanced Magnetorheological Elastomer
Magnetorheological Elastomer Vibration absorbers
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2015/3/30
This article presents the design and analysis of a novel dynamic stiffness tuning vibration absorber working with Magnetorheological elastomers (MRE). In this design, the MRE worked in a shear mode, b...
Describing Functions For Effective Stiffness andEffective Damping of Hystersis Structures
Describing function hysteresis structures energy dissipation devices equivalent period ratio
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2009/2/19
For a hysteresis structure with energy dissipation devices, the force-displacement relation is nonlinear such that it is very difficult to evaluate the actual damping and stiffness coefficients, even ...
TWO-LEVEL SEISMIC DESIGN METHOD USING POST-YIELD STIFFNESS AND ITS APPLICATION TO UNBONDED BAR REINFORCED CONCRETE PIERS
post-yield stiffness two-level seismic design UBRC structure small section pier
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2008/12/22
The two-level seismic design method using post-yield stiffness is proposed. The post-yield stifiness on the load —displacement relationship of the RC pier is found to be effective for the reduction o...
New Aproach in the Evaluation of Soil Stiffness Coeficients
Soil Stiffness Coeficients structure soil
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2010/8/18
General numerical methods based on the discretization of the surface between structure and soil in finite elements are developed and, by their help, the stiffness matrix is determined. There are consi...