1) principle of minimum transformed energy
最小转换能原理
1.
Based on Benthien_Gurtin’s principle of minimum transformed energy in linear elastodynamics in Laplace space, functional in the form of single convolution integral is obtained by restoring the functional in the Laplace space back into the original space.
基于Benthien_Gurtin 给出的拉普拉斯空间上相应的最小转换能原理,将拉普拉斯空间上的泛函恢复到原空间后给出一个只含单重卷积形式的泛函。
2) minimal potential energy principle
最小势能原理
1.
Since,the total potential energy of woven fabrics,is in spline function with the yarn shape curve,the minimal potential energy principle is satisfied when the system is stable.
首先对被施加外部荷载的织物建立数学模型,由于相应的机织织物结构的总势能U是关于纱线形状曲线的泛函,当系统稳定时满足最小势能原理,通过求泛函极值,获得机织织物结构中纱线路径的较为真实的形状曲线,从而为描述机织织物结构几何模型和力学模型提供了相应的理论途径。
3) principle of least energy consumption
最小耗能原理
1.
The thermodynamics theory and the principle of least energy consumption were applied to studying the energy consumption and damage evolution of short-fibre composites under repeated low velocity impact.
运用热力学理论和最小耗能原理,研究了反复低速冲击下短纤维复合材料的能量耗散与损伤演变,给出了冲击循环下材料耗散能表达式,建立了与复合材料割线模量降低率相关的损伤变量表达式和损伤演变方程。
2.
Regarding the process of rock yield deformation and failure as a process of energy release and energy dissipation,a failure criterion of deep rocks subjected to coupling effects of confining pressure and temperature is proposed according to the principle of least energy consumption.
将岩石的屈服破坏过程视为能量释放和能量耗散的过程,根据最小耗能原理导出了温度和压力耦合作用下的深部岩石屈服破坏准则。
3.
any course of energy consumption will be carried out by means of least consumption of energy corresponding to the condition of restraint,called principle of least energy consumption has been verified in this paper.
本文证明了“任何耗能过程都将在与其相应的约束条件下,以最小耗能的方式行”这一重要结论,并将此重要结论称为最小耗能原理。
4) principle of minimum potential energy
最小位能原理
1.
Based on the principle of minimum potential energy, the helical buckling of a drillstring is studied, with its top end free circumferentially and lower end hinged.
基于最小位能原理,研究了斜直井内钻柱的非线性螺旋屈曲问题。
2.
Based on the principle of minimum potential energy,the helical buckling of a drillstring with its top end free circumferentially and lower end hinged is studied.
借助于圆柱面坐标系,基于最小位能原理,用 Rayleigh-Ritz 法研究了斜直井内钻柱的非线性螺旋屈曲问题。
5) minimum energy principle
能量最小原理
1.
The design and construction of separate tunnels,small net-spacing tunnels and double-arch tunnels should follow the principle of trying to maintain the initial state of the surrounding rock mass and the minimum energy principle.
独立隧道、小净距隧道和连拱隧道三种隧道设计与施工都要遵循"基本维持围岩原始状态"和"能量最小原理"。
6) principle of minimum free energy
最小自由能原理
1.
Multiphase equilibrium mathematical model for the copper flash smelting process is established based on the Gibbs principle of minimum free energy.
基于吉布斯最小自由能原理,建立了铜闪速熔炼过程的多相平衡数学模型。
补充资料:弹性力学最小余能原理
弹性力学的能量原理之一,它可表述为:整个弹性系统在真实状态下所具有的余能(见应变能),恒小于与其他可能的应力相应的余能。其中可能应力是指满足平衡方程和力的边界条件的应力,记为σ。整个弹性系统的余能表示式为:
,式中左侧为真实应力σij对应的余能;右侧第一项为弹性体的余能,u*(σij)为余能密度,Ω是物体所占的空间;第二项为已知边界位移的余能,B1为给定位移的边界面,ūi为给定的位移分量,pi为面力分量,dB为B1上的面积微元;式中重复下标表示约定求和。这样,最小余能原理可表示为:
U*(σij)≤U*(σ),式中的等号只有当可能应力是真实应力时才成立。最小余能原理实质上等价于弹性体的变形连续条件。它可作为弹性力学直接解法和有限元法计算的重要基础。
参考书目
胡海昌著:《弹性力学的变分原理及其应用》,科学出版社,北京,1981。
,式中左侧为真实应力σij对应的余能;右侧第一项为弹性体的余能,u*(σij)为余能密度,Ω是物体所占的空间;第二项为已知边界位移的余能,B1为给定位移的边界面,ūi为给定的位移分量,pi为面力分量,dB为B1上的面积微元;式中重复下标表示约定求和。这样,最小余能原理可表示为:
U*(σij)≤U*(σ),式中的等号只有当可能应力是真实应力时才成立。最小余能原理实质上等价于弹性体的变形连续条件。它可作为弹性力学直接解法和有限元法计算的重要基础。
参考书目
胡海昌著:《弹性力学的变分原理及其应用》,科学出版社,北京,1981。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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