缩聚方法

固体火箭发动机模态分析的缩聚方法

Modal analysis of solid rocket motors by means of a reduced method

一种改进的模型缩聚方法

An improved method for structural finite element modal reduction

航天器结构动力模型修正中的缩聚方法

Matrix Reduction Method for Updating Dynamic Model

将矩阵幂迭代法与移频技术相结合，建立了一种新的结构动力缩聚方法。

Combining the matrix power accelerated subspace iteration method with the shift technique , this paper presents a novel structural dynamic condensation method .

与其他状态空间模型缩聚方法相比，该方法节省了大量计算时间并降低了迭代运算所需的计算机资源。

As compared with the other state-space condensation procedures , the improved iterative condensation method can reduce the computational time and decrease the required computer resources .

本文采用动力缩聚方法对减速齿轮箱船体基座的有限元分析模型经阻尼处理前、后的固有特性及动响应进行了分析计算。

The dynamic responses and the inherent properties , before and after damping treatment , of the base for gear reducer are analyzed by using FEM method .

利用试验数据修正航天器结构动力模型时，使用缩聚方法使有限元自由度与试验自由度匹配。

When the spacecraft structural dynamic model is updated using test data , the freedom of FEM can be matched with test freedom by means of reduction method .

本文以废旧聚酯瓶为原料，采用固相缩聚的方法，合成了特性粘度0.7～1.2范围的高分子量PET，使回收的聚酯瓶能得以重新被利用。

PET with a specific viscosity of 0 . 7-1 . 2 was synthesized from waste polyester bottle by solid - state polycondensation .

采用DMT与BD、EG共缩聚的方法制取的共聚酯是无规共聚酯。

The copolymer manufactured by DMT Copolymerized with BD and EGis belonged to the random copolyester .

本文采用低温溶液缩聚的方法，用polyethyleneglycolBis（4-carboxyphenyl）ethers（聚乙二醇双（4-羧苯）醚，简称PEG3）与对苯二胺首次成功地合成了热致性的液晶聚酰胺。

New thermotropic liquid crystalline polyamides were prepared from polyethyleneglycol bis ( 4-caroxylhenyl ) ethers ( PEG3 ) and p-phenylenediamine by using solution condensation method at a relative low temperature .

以双酚A（BPA）和间苯二甲酰氯（IC）作为反应体系，采用界面缩聚的方法得到了NF－1（nanofiltrationmembrane）复合纳滤膜。双酚A多段滴流床反应气提模型试验分析

Composite nanofiltration membrane ( NF1 ) was obtained by the interfacial polymerization using bisphenolA ( BPA ) and isophthaloyl chloride ( IC ) . ANALYSIS OF REACTION AND STRIPPING PROCESS WITH MULTI STAGES TRICKLE BED REACTOR IN THE MODEL TEST OF BPA

采用4,6-二氨基间苯二酚（DAR）与对苯二甲酸（TPA）缩聚的方法制备PBO聚合物溶液，在180~200℃使聚合物形成液晶态，利用干喷湿纺制法制备纤维。

The PBO polymer solution was synthesized by means of polycondensation of 4,6-diaminoresorcinol ( DAR ) and terephthalic acid ( TPA ) . At 180 ~ 200 ℃, the polymer starts to form liquid crystal state , and the fiber can be synthesized by using the dry-jet wet-spinning method .

通过共缩聚的方法，制备了具有良好的耐水性能和胶合性能的苯酚－三聚氰胺－尿素－甲醛树脂。

Through copolycondensation methed , a phenol-melamine - urea - formaldehyde resin was prepared .

用原位缩聚的方法合成聚对苯二甲酸丙二酯/蒙脱土纳米复合材料（PTT/MMT），所得的材料为剥离型纳米复合材料。

Poly ( trimethylene terephthalate )( PTT ) / montmorillonites ( MMT ) nanocomposites were synthesized by in-situ condensation polymerization .

以甲基和苯基氯硅烷为单体，采用水解缩聚的方法合成有机硅树脂，并对影响有机硅树脂合成的有关因素进行了研究。

The silicone resin is synthesized using hydrolysis-polycondensation method from phenyl and methyl chlorosilane , and the factors influencing this synthesis are investigated .

本文从逆迭代法出发，导出了一种有限元模型动力缩聚迭代方法。

Based on the inverse iteration method , an iterative technique for dynamic condensation of finite element models has been derived in this paper .

以多胺为主要原料制备了含有活性基团的单体，再通过均聚、共聚或缩聚的方法制备了一系列含有氨基二硫代甲酸基团的聚合物。

Monomers containing active functional groups were prepared from polyamine and achieved a series of polymers with dithiocarbamate by homopolymerization , copolymerization or polycondensation methods .

用PET缩聚反应动力学方法研究自制无锑催化剂的催化效果，无锑催化剂对缩聚反应速率常数及反应时间的影响。

The catalytic effectiveness of a self-made antimony-free catalyst was studied by PET polycondensation kinetic analysis . The effect of antimony-free catalyst on polycondensation reaction rate constant and reaction time was investigated .

针对模型缩聚的SEREP方法，提出利用矩阵分解技术进行动力系统主副自由度的算法。

A method to select the master and the slave DOFs in finite element model of dynamic structures is provided by using matrix decomposition technique .

人们相继采用接枝、后磺化、直接缩聚和共混等方法来制备PBI基质子交换膜。

A series of Polybenzimidazole based PEM was prepared by grafting , post-sulfonation , direct polycondensation , and blending .

利用狭缝形喷丝板，将热缩聚和催化缩聚两种不同方法制得的中间相沥青纺制成中空纤维。

Abstract : Siot spinnerettes were used to prepare hollow pitch fibers from mesophase pitchs which were made from two different methods : thermal condensation and catalytic condensation .

提出了一种基于矩阵广义逆的有限元模型动力缩聚移频迭代方法。

Based on the general inverse technique of matrices , an iterative method of dynamic condensation of finite element models with considering shifting frequency is presented in this paper .

研究了乳酸熔融缩聚和溶剂回流脱水缩聚两种聚合方法及几种扩链剂对乳酸聚合物相对分子质量的影响。

The influence of melt polycondensation and solvent refluxing methods of lactide polymerization and chain extension agents on relative molecular weight of polylactide was studied .

综述了催化剂对聚乳酸熔融缩聚的影响，以及对乳酸熔融缩聚传统方法的改进。

The amelioration of the traditional method of the PLA melt polycondensation is also discussed .

为了改善动力缩聚法的收敛率，笔者基于矩阵幂迭代法，建立了一种新的动力缩聚方法。

In order to improve the convergence rate of the dynamic condensation method , a new dynamic condensation method based on matrix power accelerated subspace iteration method is developed in this paper .