道路交通外文文翻译--公路防撞护栏体系-公路隧道(编辑修改稿)

道路交通外文文翻译--公路防撞护栏体系-公路隧道(编辑修改稿)内容摘要：

tate a kind of research approach of traffic accident to e to test to bump into. It can get automobile sport orbit and sport posture in the course of striking , such true believable technical parameters as the number value of shock power ,etc. of deformation and damage characteristic and colliding of the automobile and guardrail , thus offered the scientific basis for the dependability of other research approach ine results of design and verification of the safe and reliable guardrail structure. Now, various countries bump into the test of the real car of the system to regard as the basic prerequisite studied to the guardrail . Because the way side guardrail itself is a barrier , in a situation that the condition is permitted, the side guardrail of the way should be set up as much as possible and far away from the runway. So, the vehicle which deviates from the runway can perhaps is it answer to sail in the runway again having no accidents most heavy . Way side object exceed from runway edge sure to after worthing , take as the barrier , driver can because reducing speed last position. This distance is called and leant towards the location horizontally . This distance varies with speed, must pay attention to guaranteeing the proper transition is designed when No. link with other structures thing in side guardrails。 Should also pay attention to guaranteeing the proper distance between the guardrail and barrier . The deformation when the guardrail collides is not only an important factor that the form is chosen, but also an important factor set up . When the barrier especially protected is a rigidity object, the distance between the guardrail and object should be large in order to prevent the vehicle from stumbling hindering on the rigidity object enough. Set up the side guardrail of the way to guaranteeing the function on the way with safe side is great rationally, but the diversification of the side guardrail form of the way and influence factor of establishment make the design of the side guardrail of the way very plicated numerously Guardrail as superhighway a important one safety devices most one of , can prevent vehicle from go out highway or intrude upon to to go the lane, have function of reducing accident losses , guaranteeing the traffic safety, for improving sense of safety and fortableness that the department rides personnel, it is indispensable to improve the economy of highway transportation and social benefit. The guardrail is one of the most important safety devices of expressway . According to the difference which can suck the way, the guardrail is divided into the following 3 typical forms : Rigidity guardrail , the semirigid guardrail and flexible guardrail . The function of the guardrail is: When the automobile and guardrail collide , under one39。 s own situation not destroyed , absorb the energy of colliding partly, and channel the automobile into the runway , guarantee the automobile does not cross the guardrail and rushes into the relative lane or puts the bank protection rollingly . So the requisition for guardrail is: Must have enough intensity and proper rigidity , there should the stronger one that can suck the characteristic and certain direction ability at the same time. Obviously, it is different that systematic security with colliding to the automobile the semirigid guardrail of study on security that the automobile collides is studied, in automobile collide security research results that make can is it guide semirigid design of guardrail to use for directly either in studying。 Or regard the automobile as and have no form of geometry and the particle of the size or simple spring quality damping system, is it is it study semirigid guardrail for line elastomer semirigid designing technique of guardrail wait for such as anticollision mechanism to e to simplify at the same not already while studying considered the ball plasticity of the semirigid guardrail moves on the influence of the law to the automobile big and out of shape, consider geometry form , size and automobile car body structure of automobile play plasticity to be heavy and out of shape to semirigid guardrail heavy influence out of shape too, have not considered the emergency rate effect of the material and inertia effect are to the automobile car body structure and large influence out of shape of semirigid guardrail , have not considered the influence of each and one39。 s own the automobile and semirigid guardrail and contact and friction each other even more. In a word , have not considered any coupling dynamics phenomenon . Obviously, the essence that the designing technique of semirigid guardrail received like this can not reflect the question , result its unfavorable to special, great malignant traffic accident prevent and cure improvement of petence. We think , two inalienable ponents in the system that the automobile and semirigid guardrail collide in the automobile bumps into this incident of semirigid guardrail , the mutual coupling of two , influencing each other , form an organic whole together. While the automobile bumps into the semirigid guardrail , the automobile will keep in touch with the semirigid guardrails , and position and area of contact that are exposed to will change with sport of the automobile , the contact area changed will produce the contact strength and frictional force changed changed , under acting on monly in contact strength and frictional force changed of changing, semirigid guardrail and automobile car body structure will take place size and whom position change heavy and out of shape (this kind is big and out of shape and often closely related to the emergency rate effect of the material and inertia effect), This kind heavy to can cause new contact while being out of shape (including automobil。