boom n. 1.(雷、炮等的)隆隆声,轰轰声,(波浪的)澎湃声;(鼓等的)咚咚声;(蜂等的)嗡嗡声;(鹭鸶等的)鸣叫;有回响的声音。 2.(市面的)忽然兴旺,景气,繁荣,勃兴;(候选人等的)突然大得人心[出名];(形势的)突然好转;(城市等的)急速发展;(物价等的)暴涨;(人口等的)激增。 the war boom 战争景气。 a building boom 建筑业的兴旺。 vi. 1.(雷等)隆隆响;(波浪声)澎湃;(鼓等)咚咚地响;(蜂声)嗡嗡;(鹭鸶等)鸣叫。 2.(市面等)突然兴隆,繁荣;(物价等)暴涨;(人口等)激增;(城市等)急速发展;(形势等)突然好转;(候选人等)突然得人心[出名]。 Guns are booming. 炮声隆隆。 Not far off the Pacific boomed. 不远处,太平洋的涛声轰鸣。 vt. 1.用隆隆声发出。 2.(用广告等)推广销路;捧(候选人等)。 3.使迅速发展,使兴旺。 He boomed out the verse. 他用低沉的声音朗读诗句。 adj. 〔美国〕猛涨起来的,忽然发展[兴旺]起来的。 boom prices 猛涨起来的物价。 n. 1.【造船】帆的下桁,帆遄,横杠,吊杆;悬[转、起重]臂。 2.横江铁索,(港口的)水栅,栅栏;水上航标;【林业】筏堰。 vt. (以下桁)张开帆脚。 vi. (船)以最高速航行。 boom nets 【军事】栅栏揿〔战时港口的水底铁丝网〕。 heavy boom 重吊杠。 lower the boom on 〔口语〕 1. 禁止。 2. 严惩。
This paper is focussed on the deployable boom system ( dbs ) of geospace double star exploration project ( dsp ) of chinese accademy of sciences . the main content of the paper is as following : 1 针对中国科学院“地球空间双星探测计划”的有效载荷探头伸展机构,本文进行了机构动力学和结构动力学的理论分析和研究,主要内容如下:1
This paper gives out the theoretic bases of the deploying kinematic analysis of dbs, and based on the deploying principle of deployable booms, this paper derives an analytical model of deployable booms for dsp . considering the topology of the boom systems, this paper discussed the dbs's two placements on the satellite and two corresponding movements for the booms . in this paper, such two movements are discussed in depths, and digital simulations have been made to check the probability 本文给出了伸杆机构展开运动学分析的理论依据,从伸杆机构展开原理出发,建立了双星伸杆机构展开运动学模型,根据双星伸杆总体设计方案,分析了伸杆在星上的两种主要布置方式并做了相应的展开运动分析和数值模拟,得到了两种方式的结果并进行了分析比较,为设计方案的选择提供了依据。
This paper gives out the theoretic bases of the deploying kinematic analysis of dbs, and based on the deploying principle of deployable booms, this paper derives an analytical model of deployable booms for dsp . considering the topology of the boom systems, this paper discussed the dbs's two placements on the satellite and two corresponding movements for the booms . in this paper, such two movements are discussed in depths, and digital simulations have been made to check the probability 本文给出了伸杆机构展开运动学分析的理论依据,从伸杆机构展开原理出发,建立了双星伸杆机构展开运动学模型,根据双星伸杆总体设计方案,分析了伸杆在星上的两种主要布置方式并做了相应的展开运动分析和数值模拟,得到了两种方式的结果并进行了分析比较,为设计方案的选择提供了依据。
The analysis results show that the palcement styles and the rotating angles of such a large scale deployable boom systems are functional importantly . the motions and damps of the boom systems also take importance . if motions become larger, the time for the booms to reach their spreaded states is shorter, and the impact velocities become larger, the impact accelerations become larger too 分析结果表明,对于大尺度的伸杆机构,其布置方式和展开角度对其展开运动有重要的影响;同时也研究了铰链处外力矩对展开运动的影响,随着该力矩的增大,伸杆到达锁定状态的时间减少,碰撞时的速度增加,由此产生较大的加速度;分析了伸杆弹性和阻尼对伸杆展开过程的影响,弹性增大碰撞加速度增大,阻尼增大加速度减小,因此可将铰链处外力矩和伸杆阻尼作为伸杆展开运动调节的手段。