【正文】 Chinese)[10] ZHAI P X. Axial piston pump[M]. Beijing: China Coal Industry Publishing House, 1978. (in Chinese)[11] JAROSLAV I, MONIKA I. Hydrostatic pumps and motors[M]. India: Academia Books International, 2001.[12] NA C L. The distribution principles of pressible fluid in axial piston pump[M]. Beijing: The Publishing House of Ordnance Industry, 2003. (in Chinese)基于虛擬樣機(jī)技術(shù)的軸向柱塞泵的建模與仿真文摘: 一個(gè)特定的重點(diǎn)放在軸向活塞泵的虛擬樣機(jī)技術(shù)(VPT)。, 5176。然后一個(gè)特別的強(qiáng)調(diào)是放在動力學(xué)模型和水力模型,模擬的流量脈動、壓力脈動、運(yùn)動原理、應(yīng)力和應(yīng)變分布的中間軸與柱塞的操作。一個(gè)柱塞泵的虛擬樣機(jī)在2002年由德國的亞琛技術(shù)大學(xué)用商業(yè)液壓和動態(tài)軟件制造。 (3)斜盤傾角的變化由旋轉(zhuǎn)驅(qū)動在一個(gè)定義的工作范圍內(nèi)。為了構(gòu)建液壓模型,有一些假設(shè)如下：（1）柱塞泵運(yùn)行穩(wěn)定和中間軸的旋轉(zhuǎn)速度定義常數(shù)。由于一個(gè)泵有九個(gè)柱塞,所以整個(gè)泵模型包括9個(gè)綜合活塞模型,如圖6所示。泵的輸出流量和壓力被直接使用于液壓系統(tǒng)來驅(qū)動負(fù)載。,5176。在柱塞上的這個(gè)最大應(yīng)力大約是222 。但隨著建模的開發(fā)和計(jì)算,這個(gè)VPT有可能有助于開發(fā)新一代有更高性能的柱塞泵樣機(jī)。應(yīng)力和應(yīng)變能描述強(qiáng)度和變形程度。在柱塞泵中,柱塞用于吸油和排油，所以流體作用于活塞力是可變的和復(fù)雜的。因此,液壓接口,動態(tài)界面和柔性體界面是根據(jù)工作環(huán)境建立的。因?yàn)閮煞N不同的孔的不同角度是180176。在動態(tài)軟件,所有這些運(yùn)動副和運(yùn)動參數(shù)被添加到相應(yīng)的部分。有幾種假說如下。有時(shí)甚至可以取代物理模擬試驗(yàn)并且節(jié)省開發(fā)成本。流體特征被液壓軟件計(jì)算。Modeling and Simulation on Axial Piston Pump Based on Virtual Prototype TechnologyAbstract: A particular emphasis is placed on the virtual prototype technology (VPT) of axial piston pump. With this technology it is convenient and flexible to build a plicated 3D virtual based on real physical model. The actual kinematics pairs of the parts were added on the model. The fluid characters were calculated by hydraulic software. The shape of the parts, the flexible body of parts, etc. were improved in this prototype. So the virtual prototype of piston pump can work in puter like a real piston pump, and the flow ripple, pressure pulsation, motion principle, stress of parts, etc. can be investigated. The development of the VPT is introduced at the beginning, and the modeling process of the virtual prototype is explained. Then a special emphasis is laid on the relationship between the dynamics model and the hydraulic model, and the simulations on the flow ripple, pressure pulsation, motion principle, the stress and strain distribution of the middle shaft and piston are operated. Finally, the advantages and disadvantages of the VPT are discussed. The improved virtual prototype of piston pump more tally with the real situation and the VPT has a great potential in simulation on hydraulic ponents.Key words: virtual prototype, axial piston pump, dynamics1 Introduction?Axial piston hydrostatic pump is an important hydraulic ponent, which is widely applied both in industry and mobile machine. As the piston pump has plicated structure and posite highspeed motion, so it is difficult to do exactly research on the pump. The pump model is always simplified to a great degree. And the simplifications bring considerable deviation. With the development of puter and multibody dynamics, the virtual prototype technology (VPT) is used for studying hydraulic system and ponents. Virtual prototype technology is a new engineering technology. With the VPT plex mechanism system model can be made and its dynamics characteristic can be simulated at a very real condition by integrating modeling tools from several different fields and simulation methods. The core of VPT is the dynamics model, which have several interfaces to connect other models, such as hydraulic model and fitness element method (FEM) model. So the virtual prototype built based on VPT can simulate most of the pump performances, and the simulation results of the virtual prototype are very close to the test results of the physics prototype. Sometimes the simulation can even replace physics test and save the development cost[1]. Hydraulic virtual prototype technology integrate the advanced 3D CAD modeling method and hydraulic simulation technology to predict performance and study characteristics of a machine[1]. Because of the plicated structure and nonlinear characteristics of the hydraulicsolid coupling, it is timeconsuming and expensive with traditional tryanderror design way, and the analysis results of traditional way are not accurate enough[2]. The virtual prototype of hydraulic machine, such as the axial piston pump, is a better way to predict the performance of hydraulic ponent[3]. With the mercial hydraulic and dynamic softwares, a virtual prototype of piston pump was made by Aachen Technique University, Germany, in 2002[4]. The hydraulic characteristics and frictions between the key tribopairs were analyzed[5?6]. In order to optimize the incline angle of the swash plate, a virtual prototype of a bent axis piston pump was made in 2003[7]. The concept of virtual prototype of piston pump was proposed in 2004, the output pressure and flow ripple, the strain and stress of the key parts were all analyzed[8]. It is very useful for the optimi