共查询到20条相似文献,搜索用时 928 毫秒
1.
熊显萍 《数学的实践与认识》2018,(16)
研究了N维空间中带非线性阻尼项的欧拉-泊松方程组的径向对称解的爆破问题.当t≥0时,定义了泛函H(t)和测试函数φ(r),采用积分法得到了当H(0)满足一定条件时在非光滑边界条件下方程组的非平凡径向对称解将在有限时间内发生爆破.采用相似的方法也得到了一维空间中径向对称解的相应结论. 相似文献
2.
利用一个特殊不等式得到一类具记忆项的非线性阻尼双曲方程解的爆破条件.方程描述了具记忆时滞的粘弹性梁问题. 相似文献
3.
该文研究了一类具非线性记忆项的高阶阻尼双曲系统的初值问题,利用试验函数方法,给出了弱解的一个爆破结果. 相似文献
4.
《应用泛函分析学报》2017,(1)
本文研究一类具时滞和记忆项的非线性粘弹性波动方程的初边值问题.对初始条件、时滞项、记忆项、非线性源项和阻尼项附加适当的条件,利用凸性方法证明了能量解的爆破性,从而推广了已有文献的结果. 相似文献
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《数学的实践与认识》2019,(24)
研究一类具阻尼项的二阶广义Emden-Fowler型变时滞的泛函差分方程的振动性,通过引入二重序列H_(n,s),并结合一些经典不等式,获得了该类差分方程振动的4个新的充分条件,所得结果反应了时滞项和阻尼项在差分系统振动中的影响作用. 相似文献
7.
本文考虑了一个带有非线性阻尼项的粘弹性方程组.通过使用扰动能量的方法,我们得到了整体解的能量泛函依据松弛函数的衰减速率按指数衰减或者多项式衰减. 相似文献
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研究四阶带有阻尼项的非线性波动方程的解的初边值问题,利用位势井方法,证明了当初值满足一定条件时解发生爆破.将有关该系统爆破性质的研究结果一般化,通过证明得到了该系统较好的性质. 相似文献
10.
《数学的实践与认识》2019,(20)
利用经典的算子半群理论,研究了一类具有非线性阻尼和非线性外力项的梁方程的初边值问题,证明了系统解的存在唯一性,然后引入一个算子半群;利用经典的算子半群分解方法,证明了系统存在整体吸引子. 相似文献
11.
In this paper, the analytical blowup solutions of the N-dimensional radial symmetric compressible Euler equations are constructed. Some previous results of the blowup solutions for the compressible Euler equations with constant damping are generalized to the time-depending damping case. The generalization is untrivial because that the damp coefficient is a nonlinear function of time t.
相似文献12.
《Mathematical Methods in the Applied Sciences》2018,41(12):4754-4762
The blowup phenomenon of solutions is investigated for the initial boundary value problem of the 3‐dimensional compressible damped Euler equations. It is shown that if the initial functional associated with a general test function is large enough, the solutions of the damped Euler equations will blow up on finite time. Hence, a class of blowup conditions is established. Moreover, the blowup time could be estimated. 相似文献
13.
在初始资料的某些限制下证明有限初始能量的相对论欧拉方程组柯西问题光滑解的爆破.该文的爆破条件不需要初始资料具有紧支集,部分补充了Pan和Smoller的经典爆破结果(2006). 相似文献
14.
This paper deals with the blow-up phenomenon, particularly, the geometric blow-up mechanism, of classical solutions to the Cauchy problem for quasilinear hyperbolic systems in the critical case. We prove that it is still the envelope of the same family of characteristics which yields the blowup of classical solutions to the Cauchy problem in the critical case. 相似文献
15.
Zhaoyang Yin 《Journal of Mathematical Analysis and Applications》2003,283(1):129-139
We establish the local well-posedness for a new periodic integrable equation. We show that the equation has classical solutions that blowup in finite time as well as classical solutions which exist globally in time. 相似文献
16.
Zhouping Xin 《纯数学与应用数学通讯》1998,51(3):229-240
We present a sufficient condition on the blowup of smooth solutions to the compressible Navier-Stokes equations in arbitrary space dimensions with initial density of compact support. As an immediate application, it is shown that any smooth solutions to the compressible Navier-Stokes equations for polytropic fluids in the absence of heat conduction will blow up in finite time as long as the initial densities have compact support, and an upper bound, which depends only on the initial data, on the blowup time follows from our elementary analysis immediately. Another implication is that there is no global small (decay in time) or even bounded (in the case that all the viscosity coefficients are positive) smooth solutions to the compressible Navier-Stokes equations for polytropic fluids, no matter how small the initial data are, as long as the initial density is of compact support. This is in contrast to the classical theory of global existence of small solutions to the same system with initial data being a small perturbation of a constant state that is not a vacuum. The blowup of smooth solutions to the compressible Euler system with initial density and velocity of compact support is a simple consequence of our argument. © 1998 John Wiley & Sons, Inc. 相似文献
17.
Hamideh B. Mohammadi Amin Esfahani 《Mathematical Methods in the Applied Sciences》2019,42(8):2854-2876
In this paper, we study the Cauchy problem for the generalized Boussinesq‐type equation with strong damping. By defining a suitable solution space with time‐weighted norms and under smallness condition on the initial data, we establish the global existence and decay property of the solutions. Under certain conditions on the initial data, we also provide blowup of the solutions. 相似文献
18.
Yong Zhou 《Mathematische Nachrichten》2005,278(11):1341-1358
In this paper we consider a nonlinear wave equation with damping and source term on the whole space. For linear damping case, we show that the solution blows up in finite time even for vanishing initial energy. The criteria to guarantee blowup of solutions with positive initial energy are established both for linear and nonlinear damping cases. Global existence and large time behavior also are discussed in this work. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
19.
对于可压缩的三维Euler方程,当其初值为振幅ε的小扰动且具有球对称性质时,我们研究了经典解的生命区间.并证明无论初值的扰动多么小,经典解都在有限时间内爆破. 相似文献
20.
YIN Huicheng 《中国科学A辑(英文版)》2000,43(3):252-266
For a class of special three-dimensional
quasilinear wave equations, we study the blowup mechanism of classical solutions. More
precisely, under the nondegenerate conditions, any radially symmetric solution with small
initial data is shown to develop singularities in the second order derivatives while the
first order derivatives and itself remain continuous, moreover the blowup of solution is
of “cusp type”. 相似文献