Welcome, I am so sorry that you are having such a difficult time with your daughter, the violence you mention is especially concerning. Please, do everything you need to in order to keep yourself and other family members safe. This may be as simple as setting a boundary around not remaining in the room when she starts to escalate, and in more extreme cases, it could possibly mean involving the authorities.
With that in mind, I would suggest that you start reading some of the information on the tabs at the top of the page, such as: the top 100 traits, what to do and what not to do, as well as resources that may be of help to you in finding help for your daughter. You will also find the forum to be a community of people who are understanding and knowledgeable, and will offer feedback and advice without judgement. The title of your post mentions escalating BPD. Has this been diagnosed? Are you able to get your daughter to speak with a therapist? In my experience, if it is truly BPD, she may be hesitant to seek help, but perhaps with your help and support she can find the help that she needs. Good luck to you.